- liuchengense, Pleuronodoceras liuchengense J.K. Zhao & al., 1978 † - (PLEURONODOCERATIDAE) (FOSSIL)
- liuchengense, Neotainoceras liuchengense J.K. Zhao & al., 1978 † - (TAINOCERATIDAE) (FOSSIL)
- Liuchengoceras, Genus Liuchengoceras Zhao & al., 1978 † (LIUCHENGOCERATIDAE) (FOSSIL)
- LIUCHENGOCERATIDAE Zhao & al., 1978 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-XENODISCOIDEA [Superfamily]) (FOSSIL)
- liuchowensis, Strigogoniatites liuchowensis J.K. Zhao, 1955 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- liufaui, Turbonilla liufaui A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- liufengshanensis, Wuxuanella liufengshanensis Cook & Pan, 2004 † - (MURCHISONIIDAE) (FOSSIL)
- liui, Antillophos liui S.Q. Zhang & S.P. Zhang, 2014 - (NASSARIIDAE)
- liui, Pseudogastrioceras liui W.K.C. Sun, 1947 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- liuiana, Mekongia liuiana T.C. Yen, 1937 - (VIVIPARIDAE)
- liujiangensis, Tusayana liujiangensis Pojeta, Zhang & Yang, 1986 † - (TUSAYANIDAE) (FOSSIL)
- liujinae, Formosana liujinae W.J.M. Maassen, 2008 - (CLAUSILIIDAE)
- liuovatus, Lamellidens liuovatus (Z. Zhuang & J. He, 2013) - (UNIONIDAE)
- liuqiaoensis, Claraia liuqiaoensis He & al., 2007 † - (PTERINOPECTINIDAE) (FOSSIL)
- lius, Capulus lius W.P. Woodring, 1928 † - (CAPULIDAE) (FOSSIL)
- lius, Conus imitator lius W.P. Woodring, 1928 † - (CONIDAE) (FOSSIL)
- lius, Malluvium lius J.C. Melvill, 1906 † - syn of: Hippocardia ohioense F.B. Meek, 1871 † - (HIPPONICIDAE) (FOSSIL)
- liuyangensis, Trigonodus liuyangensis (Gu & H.X. Liu, 1976 †) - (PACHYCARDIIDAE) (FOSSIL)
- liuyangensis, Pteronitella liuyangensis Zhang, 1977 † - (PTERINEIDAE) (FOSSIL)
- liuzhaiensis, Kargalites liuzhaiensis W.C. Zhou, 1987 † - (MARATHONITIDAE) (FOSSIL)
- Liuzhouceras, Genus Liuzhouceras Zhao , 1980 † (CYCLOLOBIDAE) (FOSSIL)
- livengoodensis, Bellerophon livengoodensis Blodgett, 1992 † - (BELLEROPHONTIDAE) (FOSSIL)
- livens, Alopia lischkeana livens (E.A. Bielz, 1853) - (CLAUSILIIDAE)
- livens, Orthalicus livens R.J. Shuttleworth, 1856 - (ORTHALICIDAE)
- livens aberrans, Zebra livens aberrans H. Strebel, 1909 - syn of: Orthalicus quagus (H. Strebel, 1909) - (ORTHALICIDAE)
- livens uhdeanus, Orthalicus livens uhdeanus E.C. Von Martens, 1893 - syn of: Orthalicus uhdeanus E.C. Von Martens, 1893 - (ORTHALICIDAE)
- liveoakensis, Cestumcerithium liveoakensis (W.C. Mansfield, 1937 †) - (CERITHIIDAE) (FOSSIL)
- liveoakensis, Jaspidella liveoakensis (W.C. Mansfield, 1937 †) - (OLIVIDAE) (FOSSIL)
- liverpoolensis, Galadistes liverpoolensis (J.W. Brazier, 1872) - (CAMAENIDAE)
- livesayanum, Stoastoma livesayanum E. Chitty, 1857 - (HELICINIDAE)
- livesayi, Obba livesayi L. Pfeiffer, 1860 - (CAMAENIDAE)
- livescens, Pomacea flagellata livescens (L.A. Reeve, 1856) - (AMPULLARIIDAE)
- livescens, Buccinum livescens R.A. Philippi, 1849 - syn of: Nassarius livescens (R.A. Philippi, 1849) - (BUCCINIDAE)
- livescens, Mesembrinus livescens (L. Pfeiffer, 1842) - (BULIMULIDAE)
- livescens, Euplica livescens (L.A. Reeve, 1859) - (COLUMBELLIDAE)
- livescens, Hemitoma livescens L.A. Reeve, 1855 - syn of: Cellana livescens (L.A. Reeve, 1855) - (FISSURELLIDAE)
- livescens, Cellana livescens (L.A. Reeve, 1855) - (NACELLIDAE)
- livescens, Nassarius livescens (R.A. Philippi, 1849) - (NASSARIIDAE)
- livescens, Nassa livescens R.A. Philippi, 1849 - syn of: Nassarius livescens (R.A. Philippi, 1849) - (NASSARIIDAE)
- livescens, Patella livescens L.A. Reeve, 1855 - syn of: Cellana livescens (L.A. Reeve, 1855) - (PATELLIDAE)
- livescens, Elimia livescens (K.T. Menke, 1830) - (PLEUROCERIDAE)
- livescens gracillor, Elimia livescens gracillor I. Lea, 1861 - (PLEUROCERIDAE)
- livescens haldemani, Elimia livescens haldemani G.W. Tryon, 1865 - (PLEUROCERIDAE)
- liviae, Zonarina liviae D. Fehse & Vicián, 2004 † - (CYPRAEIDAE) (FOSSIL)
- liviae, Frechiella liviae Renz, 1925 † - syn of: Frechiella kammerkarensis buranensis Renz, 1933 † - (HILDOCERATIDAE) (FOSSIL)
- livida, Achatinella livida W.J. Swainson, 1828 - (ACHATINELLIDAE)
- livida, Chelidonura livida N. Yonow, 1994 - (AGLAJIDAE)
- livida, Engina livida (G.B. I Sowerby, 1832) - (BUCCINIDAE)
- livida, Bursa livida L.A. Reeve, 1844 - syn of: Bursa granularis (P.F. Röding, 1798) - (BURSIDAE)
- livida, Strophiops livida C.J. Maynard, 1924 - (CERIONIDAE)
- livida, Chilina fulgurata livida H.A. Pilsbry, 1911 - (CHILINIDAE)
- livida, Alopia livida (K.T. Menke, 1828) - (CLAUSILIIDAE)
- livida, Laemodonta livida I. Perugia, 2010 - (ELLOBIIDAE)
- livida, Glycymeris livida L.A. Reeve, 1843 - (GLYCYMERIDIDAE)
- livida, Oenopota livida H.P.C. Møller, 1842 - syn of: Oenopota violacea (J.W. Mighels & C.B. Adams, 1842) - (MANGELIIDAE)
- livida, Volvarina livida L.A. Reeve, 1865 - syn of: Volvarina avena (L.C. Kiener, 1834) - (MARGINELLIDAE)
- livida, Marginella livida R.B. Hinds, 1844 - syn of: Prunum apicinum (K.T. Menke, 1828) - (MARGINELLIDAE)
- livida, Prunum livida R.B. Hinds, 1844 - syn of: Prunum apicinum (K.T. Menke, 1828) - (MARGINELLIDAE)
- livida, Melanopsis livida J. Gassies, 1863 - syn of: Melanopsis frustulum P.M.A. Morelet, 1857 - (MELANOPSIDAE)
- livida, Orania livida (L.A. Reeve, 1846) - (MURICIDAE)
- livida, Bullia livida L.A. Reeve, 1846 - syn of: Bullia vittata (C. Linnaeus, 1767) - (NASSARIIDAE)
- livida, Nassa livida J.E. Gray in P.P. King, 1827 - syn of: Nassarius dorsatus (P.F. Röding, 1798) - (NASSARIIDAE)
- livida, Natica livida L. Pfeiffer, 1840 - (NATICIDAE)
- livida, Natica livida G.W. Nowell-Usticke, 1959 - syn of: Natica livida L. Pfeiffer, 1840 - (NATICIDAE)
- livida, Septaria livida (L.A. Reeve, 1856) - (NERITIDAE)
- livida, Oliva peruviana livida C.W. Johnson, 1911 - (OLIVIDAE)
- livida, Scaeochlamys livida (J.B.P.A. Lamarck, 1819) - (PECTINIDAE)
- livida, Thuridilla livida (K. Baba, 1955) - (PLAKOBRANCHIDAE)
- livida, Gari livida (J.B.P.A. Lamarck, 1818) - (PSAMMOBIIDAE)
- livida, Psammobia livida J.B.P.A. Lamarck, 1818 - syn of: Gari livida (J.B.P.A. Lamarck, 1818) - (PSAMMOBIIDAE)
- livida, Sanguinolaria livida J.B.P.A. Lamarck, 1818 - syn of: Hiatula biradiata (W. Wood, 1815) - (PSAMMOBIIDAE)
- livida, Electroma livida G.P. Deshayes, 1836 - syn of: Electroma alacorvi (L.W. Dillwyn, 1817) - (PTERIIDAE)
- livida, Eulimella livida A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- livida, Tropaeas livida (G.B. III Sowerby, 1901) - (PYRAMIDELLIDAE)
- livida, Sayella livida H.A. Rehder, 1935 - syn of: Sayella hemphillii (W.H. Dall, 1884) - (PYRAMIDELLIDAE)
- livida, Tropaeas livida G.B. III Sowerby, 1901 - syn of: Tropaeas livida (G.B. III Sowerby, 1901) - (PYRAMIDELLIDAE)
- livida, Ranella livida L.A. Reeve, 1844 - syn of: Bursa granularis (P.F. Röding, 1798) - (RANELLIDAE)
- livida, Ervilia livida A.A. Gould, 1861 - syn of: Ervilia bisculpta A.A. Gould, 1861 - (SEMELIDAE)
- livida, Euglandina livida W.H. Dall, 1908 - (SPIRAXIDAE)
- livida, Cyrtonaias livida (C.T. Simpson, 1900) - (UNIONIDAE)
- livida, Anodon livida P.M. Heude, 1880 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- livida, Torrecoptis livida (C. de la Torre, 1912) - (UROCOPTIDAE)
- livida bipalatalis, Alopia livida bipalatalis M. von Kimakowicz, 1883 - (CLAUSILIIDAE)
- livida crassilabris, Alopia livida crassilabris A.V. Grossu - (CLAUSILIIDAE)
- livida deaniana, Alopia livida deaniana C.M. Cooke, 1922 - (CLAUSILIIDAE)
- livida emersoni, Achatinella livida emersoni W. Newcomb, 1854 - syn of: Achatinella livida emmersonii W. Newcomb, 1854 - (ACHATINELLIDAE)
- livida emmersonii, Achatinella livida emmersonii W. Newcomb, 1854 - (ACHATINELLIDAE)
- livida herbacea, Achatinella livida herbacea J.T. Gulick, 1858 - (ACHATINELLIDAE)
- livida hypula, Alopia livida hypula L. Soós, 1928 - (CLAUSILIIDAE)
- livida julii, Alopia livida julii A.J. Wagner, 1914 - (CLAUSILIIDAE)
- livida maraguanensis, Torrecoptis livida maraguanensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- livida peroniana, Scaeochlamys livida peroniana T. Iredale, 1939 - syn of: Scaeochlamys livida (J.B.P.A. Lamarck, 1819) - (PECTINIDAE)
- livida piedrasensis, Torrecoptis livida piedrasensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- livida recta, Achatinella livida recta W. Newcomb, 1854 - (ACHATINELLIDAE)
- livida solaensis, Torrecoptis livida solaensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- livida solasensis, Torrecoptis livida solasensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- livida sororcula, Alopia livida sororcula L. Soós, 1928 - (CLAUSILIIDAE)
- livida tesicoensis, Torrecoptis livida tesicoensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- livida velicana, Alopia livida velicana R. von Kimakowicz, 1933 - (CLAUSILIIDAE)
- lividae, Scaeochlamys lividae (J.B.P.A. Lamarck, 1819 †) - (PECTINIDAE) (FOSSIL)
- Lividiconus, syn of: Genus Lividoconus E. Wils, 1970 (CONIDAE)
- lividium, Cerion lividium C.J. Maynard, 1924 - syn of: Strophiops livida C.J. Maynard, 1924 - (CERIONIDAE)
- lividocincta, Chloraea lividocincta C.G. Semper, 1877 - (BRADYBAENIDAE)
- Lividoconus, Genus Lividoconus E. Wils, 1970 (CONIDAE)
- lividomaculata, Tegula lividomaculata (C.B. Adams, 1845) - (TEGULIDAE)
- lividorupis, Zemacies lividorupis C.R. Laws, 1935 † - (BORSONIIDAE) (FOSSIL)
- lividorupis, Turehua lividorupis A.G. Beu & P.A. Maxwell, 1987 † - (CANCELLARIIDAE) (FOSSIL)
- lividorupis, Coralliophila lividorupis (C.R. Laws, 1935 †) - (MURICIDAE) (FOSSIL)
- lividulum, Cerithium lividulum A. Risso, 1826 - (CERITHIIDAE)
- lividulum, Cerithium lividulum R. Bellini, 1926 ex T.A. de M. Monterosato MS - syn of: Cerithium lividulum A. Risso, 1826 - (CERITHIIDAE)
- lividulum, Cerithium lividulum P.M. Pallary, 1900 - syn of: Cerithium lividulum A. Risso, 1826 - (CERITHIIDAE)
- lividulum archipelagica, Cerithium lividulum archipelagica A. Gaglini, 1992 - (CERITHIIDAE)
- lividulum attenuata, Cerithium lividulum attenuata M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1882 - (CERITHIIDAE)
- lividulum balantia, Cerithium lividulum balantia Segre, 1954 ex T.A. de M. Monterosato MS - (CERITHIIDAE)
- lividulum fartula, Cerithium lividulum fartula (T.A. de M. Monterosato, 1917) - (CERITHIIDAE)
- lividulum grossularia, Cerithium lividulum grossularia T.A. de M. Monterosato, 1917 - (CERITHIIDAE)
- lividulum laevigata, Cerithium lividulum laevigata R.A. Philippi, 1844 - (CERITHIIDAE)
- lividulum limata, Cerithium lividulum limata T.A. de M. Monterosato, 1899 - (CERITHIIDAE)
- lividulum mediterranea, Cerithium lividulum mediterranea G.P. Deshayes, 1843 - (CERITHIIDAE)
- lividulum medrickyi, Cerithium lividulum medrickyi F. Nordsieck, 1975 - (CERITHIIDAE)
- lividulum minor, Cerithium lividulum minor M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1882 - (CERITHIIDAE)
- lividulum nana, Cerithium lividulum nana P.M. Pallary, 1910 - (CERITHIIDAE)
- lividulum nodulosa, Cerithium lividulum nodulosa P.M. Pallary, 1900 - syn of: Cerithium lividulum A. Risso, 1826 - (CERITHIIDAE)
- lividulum obesula, Cerithium lividulum obesula É.A.A. Locard, 1892 - (CERITHIIDAE)
- lividulum obliqueplicata, Cerithium lividulum obliqueplicata T.A. de M. Monterosato in W. Kobelt, 1908 - (CERITHIIDAE)
- lividulum plicata, Cerithium lividulum plicata M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - (CERITHIIDAE)
- lividulum spinagracilis, Cerithium lividulum spinagracilis P.M. Pallary, 1909 - (CERITHIIDAE)
- lividulum strumaticum, Cerithium lividulum strumaticum (É.A.A. Locard, 1886) - (CERITHIIDAE)
- lividulum terraquea, Cerithium lividulum terraquea T.A. de M. Monterosato in P.M. Pallary, 1910 - (CERITHIIDAE)
- lividum, Calliostoma lividum P. Dautzenberg, 1927 - (CALLIOSTOMATIDAE)
- lividum, Vexillum lividum P.F. Röding, 1798 - syn of: Vexillum plicarium (C. Linnaeus, 1758) - (COSTELLARIIDAE)
- lividum, Bembicium lividum R.A. Philippi, 1846 - syn of: Bembicium melanostomum (J.F. Gmelin, 1791) - (LITTORINIDAE)
- lividum, Ovulum lividum L.A. Reeve, 1865 - syn of: Simnia avena (G.B. II Sowerby, 1832) - (OVULIDAE)
- lividum, Strioterebrum lividum (L.A. Reeve, 1860) - (TEREBRIDAE)
- lividus, Bulimus lividus L.A. Reeve, 1850 - syn of: Mesembrinus granadensis (L. Pfeiffer, 1848) - (BULIMULIDAE)
- lividus, Joculator lividus A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- lividus, Chiton lividus A.T. von Middendorff, 1847 - syn of: Chaetopleura angulata (L. Spengler, 1797) - (CHITONIDAE)
- lividus, Virgiconus lividus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- lividus, Clavus lividus (C. Linnaeus, 1758) - (DRILLIIDAE)
- lividus, Melampus lividus (G.P. Deshayes, 1830) - (ELLOBIIDAE)
- lividus, Fusus lividus O.A.L. Mörch, 1862 - syn of: Aulacofusus brevicauda (G.P. Deshayes, 1832) - (FASCIOLARIIDAE)
- lividus, Modulus lividus (R.A. Philippi, 1849) - (MODULIDAE)
- lividus, Vokesimurex lividus (P.P. Carpenter, 1857) - (MURICIDAE)
- lividus, Vokesimurex lividus P.P. Carpenter, 1857 - syn of: Vokesimurex lividus (P.P. Carpenter, 1857) - (MURICIDAE)
- lividus, Orthalicus lividus E.C. Von Martens, 1863 - (ORTHALICIDAE)
- lividus, Cultellus lividus R.W. Dunker, 1862 - syn of: Ensiculus cultellus (C. Linnaeus, 1758) - (PHARIDAE)
- lividus, Macron lividus (A. Adams, 1855) - (PSEUDOLIVIDAE)
- lividus, Toxolasma lividus C.S. Rafinesque, 1831 - (UNIONIDAE)
- lividus glans, Toxolasma lividus glans I. Lea, 1831 - (UNIONIDAE)
- livingstonei, Achatina livingstonei J.C. Melvill & J.H. Ponsonby, 1897 - (ACHATINIDAE)
- livingstonei, Nembrotha livingstonei J.K. Allan, 1933 - (POLYCERIDAE)
- livingstonensis, Coelastarte livingstonensis Imlay, 1964 † - (ASTARTIDAE) (FOSSIL)
- livingstonensis, Volutaxis livingstonensis (H.A. Pilsbry, 1920) - (SPIRAXIDAE)
- livingstonensis, Leptinaria livingstonensis A. Hinkley, 1920 - (SUBULINIDAE)
- livingstonensis, Burtonia livingstonensis C.T. Simpson, 1900 - syn of: Pseudospatha tanganyicensis (E.A. Smith, 1880) - (UNIONIDAE)
- livingstoni, Liguus fasciatus livingstoni C.T. Simpson, 1920 - (ORTHALICIDAE)
- livingstoniana, Burtonia livingstoniana J.R. Bourguignat, 1883 - syn of: Pseudospatha tanganyicensis (E.A. Smith, 1880) - (UNIONIDAE)
- Livinhacia, syn of: Genus Burtoa J.R. Bourguignat, 1889 (ACHATINIDAE)
- livnoensis, Medora macascarensis livnoensis H. Nordsieck, 1970 - (CLAUSILIIDAE)
- Livona, syn of: Genus Cittarium R.A. Philippi, 1847 (TEGULIDAE)
- Livonia, Genus Livonia J.E. Gray, 1855 (VOLUTIDAE)
- livonicus, Limax livonicus F. von Schrank, 1848 - syn of: Lehmannia marginata (O.F. Müller, 1774) - (LIMACIDAE)
- Livorniella, syn of: Genus Microhedyle H. Hertling, 1930 (PARHEDYLIDAE)
- LIVORNIELLIDAE - syn of Family: PARHEDYLIDAE
- livronica, Anodonta livronica J.R. Bourguignat, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- liwaensis, Diplommatina liwaensis T.H. Aldrich, 1898 - (DIPLOMMATINIDAE)
- lixa, Macrochlamys lixa (W.T. Blanford, 1866) - (ARIOPHANTIDAE)
- lixa, Costellaria lixa E.J. Petuch, 1979 - syn of: Nodicostellaria kaicherae (E.J. Petuch, 1979) - (COSTELLARIIDAE)
- lixa, Vexillum lixa E.J. Petuch, 1979 - syn of: Nodicostellaria kaicherae (E.J. Petuch, 1979) - (COSTELLARIIDAE)
- lixa, Plastiscala lixa T. Iredale, 1936 - syn of: Plastiscala magna (J.H. Gatliff & C.J. Gabriel, 1910) - (EPITONIIDAE)
- lixa, Alaba lixa (T. Iredale, 1936) - (LITIOPIDAE)
- lixi, Ceratosoma lixi A. de Rochebrune, 1894 - syn of: Ceratosoma trilobatum (J.E. Gray, 1827) - (CHROMODORIDIDAE)
- lixianense, Gaetanoceras lixianense Zheng, 1984 † - (AGATHICERATIDAE) (FOSSIL)
- lixianense, Paratongluceras lixianense Zheng, 1984 † - (CYCLOLOBIDAE) (FOSSIL)
- lixii, Onchidium lixii A. Labbé, 1934 - (ONCHIDIIDAE)
- lixula, Ostrea lixula N.E. Weisbord, 1964 - (OSTREIDAE)
- Lizaconus, syn of: Genus Profundiconus J.T. Kuroda, 1956 (CONIDAE)
- lizae, Sinoennea lizae Maassen, 2008 - (DIAPHERIDAE)
- lizae, Leptadrillia lizae P.J. Fallon, 2016 - (DRILLIIDAE)
- lizae, Cuthona lizae O. Angulo-Campillo & Á. Valdés, 2003 - (FIONIDAE)
- lizae, Phyllidiella lizae D.J. Brunckhorst, 1993 - (PHYLLIDIIDAE)
- lizanoi, Prunum lizanoi J. Magaña, J. Espinosa & J.A. Ortea, 2003 - (MARGINELLIDAE)
- lizarasoae, Pseudoperonaeus lizarasoae W.K. Weyrauch, 1967 - (BULIMULIDAE)
- lizardense, Phyllodesmium lizardense G.E. Burghardt, M. Schrödl & H. Wägele, 2008 - (FACELINIDAE)
- lizardensis, Horologica lizardensis A. Nützel, 1998 - (CERITHIOPSIDAE)
- lizardensis, Eremiconus lizardensis (J.C.H. Crosse, 1865) - (CONIDAE)
- lizardensis, Phasmoconus lizardensis J.C.H. Crosse, 1865 - syn of: Eremiconus lizardensis (J.C.H. Crosse, 1865) - (CONIDAE)
- lizardensis, Theskelomensor lizardensis (L. Pfeiffer, 1863) - (ENDODONTIDAE)
- lizardensis, Helicina lizardensis J.C. Cox, 1868 - syn of: Pleuropoma gouldiana (E. Forbes, 1851) - (HELICINIDAE)
- lizardensis, Spirostyliferina lizardensis K. Bandel, 2006 - (LITIOPIDAE)
- lizarrustii, Mesarion lizarrustii C. Garrido, J. Castillejo & J. Iglesias, 1995 - (ARIONIDAE)
- lizarum, Conasprella lizarum (G. Raybaudi Massilia & A.J. Da Motta, 1992) - (CONIDAE)
- lizarum, Fumiconus lizarum (G. Raybaudi Massilia & A.J. Da Motta, 1992) - syn of: Conasprella lizarum (G. Raybaudi Massilia & A.J. Da Motta, 1992) - (CONIDAE)
- lizarum, Hermes lizarum G. Raybaudi Massilia & A.J. Da Motta, 1992 - syn of: Conasprella lizarum (G. Raybaudi Massilia & A.J. Da Motta, 1992) - (CONIDAE)
- lizeri, Anodontites lizeri M. Doello-Jurado, 1924 - syn of: Anodontites trigona (J.B. von Spix & J.A. Wagner, 1827) - (MYCETOPODIDAE)
- ljaschenkoae, Virginoceras ljaschenkoae Bogoslovsky, 1969 † - (GEPHUROCERATIDAE) (FOSSIL)
- Ljaschenkovites, Genus Ljaschenkovites Dorodnova, 1994 † (TENTACULITIDA (UNASSIGNED)) (FOSSIL)
- ljashenkojana, Paranowakia ljashenkojana Alberti, 1987 † - (PARANOWAKIIDAE) (FOSSIL)
- ljaurica, Caspiohydrobia ljaurica Y.I. Starobogatov & Z.I. Izzatullaev, 1974 - (HYDROBIIDAE)
- ljiljanae, Zeteana ljiljanae P. Glöer & V.M. Pešic, 2014 - (HYDROBIIDAE)
- ljovuschkini, Horatia ljovuschkini Y.I. Starobogatov, 1962 - (HYDROBIIDAE)
- ljovuschkini, Pseudocaspia ljovuschkini Y.I. Starobogatov, 1972 - (HYDROBIIDAE)
- ljovuschkini, Pisidium ljovuschkini Y.I. Starobogatov, 1962 - syn of: Pisidium ljovushkini (Y.I. Starobogatov, 1962) - (SPHAERIIDAE)
- ljovushkini, Pisidium ljovushkini (Y.I. Starobogatov, 1962) - (SPHAERIIDAE)
- ljovushkini, Euglesa ljovushkini Y.I. Starobogatov, 1962 - syn of: Pisidium ljovushkini (Y.I. Starobogatov, 1962) - (SPHAERIIDAE)
- ljubetenensis, Campylaea trizona ljubetenensis (A.J. Wagner, 1914) - (HELICIDAE)
- ljubetenensis, Illyriobanatica wagneri ljubetenensis R. Sturany, 1914 - (ORCULIDAE)
- ljubicnicensis, Herilla ziegleri ljubicnicensis (A.J. Wagner, 1915) - (CLAUSILIIDAE)
- ljubovae, Arctonautilus ljubovae (Schastlivtceva, 1981 †) - (PROPTYCHITIDAE) (FOSSIL)
- Ljudmilena, Genus Ljudmilena A.A. Schileyko, 1984 (ENIDAE)
- llaguenica, Epiphragmophora llaguenica A. Zilch, 1953 - (EPIPHRAGMOPHORIDAE)
- llajasensis, Architectonica llajasensis Sutherland, 1966 † - (ARCHITECTONICIDAE) (FOSSIL)
- llajasensis, Mitrella llajasensis R.L. Squires, 2015 - (COLUMBELLIDAE)
- llajasensis, Nayadina llajasensis Clark, 1934 † - (ELIGMIDAE) (FOSSIL)
- llajasensis, Exputens llajasensis Clark 1934 † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- llajasensis, Eotibia llajasensis (Clark, 1942 †) - (ROSTELLARIIDAE) (FOSSIL)
- llajasensis, Serpulorbis llajasensis R.L. Squires, 1990 † - (VERMETIDAE) (FOSSIL)
- Llandeilochiton, Genus Llandeilochiton Bergenhayn, 1956 † (NEOLORICATA (UNASSIGNED)) (FOSSIL)
- llandoveri, Cyrtoceras llandoveri Blake † - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- llandoveriana, Cyrtolites nodosus llandoveriana Reed, 1921 † - (CYRTOLITIDAE) (FOSSIL)
- Llanoceras, Genus Llanoceras Flower, 1964 † (ELLESMEROCERATIDAE) (FOSSIL)
- llanoensis, Pseudopronorites llanoensis (Plummer & P.H. Scott, 1937 †) - (PRONORITIDAE) (FOSSIL)
- llanquihuense, Pisidium llanquihuense C.F. Ituarte, 1999 - (SPHAERIIDAE)
- llanquihuensis, Chilina llanquihuensis W.B. Marshall, 1933 - (CHILINIDAE)
- llanvirnense, Bathmoceras llanvirnense (S.R. Roberts, 1884 †) - (BATHMOCERATIDAE) (FOSSIL)
- llanvirnense, Conoceras llanvirnense S.R. Roberts, 1884 † - syn of: Bathmoceras llanvirnense (S.R. Roberts, 1884 †) - (ENDOCERIDA (unassigned)) (FOSSIL)
- llanvirnensis, Pleurotomaria llanvirnensis Hicks † - (PLEUROTOMARIIDAE) (FOSSIL)
- llanvirnensis, Modestospira llanvirnensis (Hicks, 1875 †) - (SINUITIDAE) (FOSSIL)
- llareni, Pachydiscus llareni Wiedmann, 1960 † - syn of: Pachydiscus jacquoti (Seunes, 1890 †) - (DESMOCERATIDAE) (FOSSIL)
- llaucanensis, Bostryx llaucanensis W.K. Weyrauch - (BULIMULIDAE)
- Llaucanianus, Genus Llaucanianus W.K. Weyrauch, 1967 (BULIMULIDAE)
- llavorsiana, Clausilia llavorsiana P. Fagot, 1884 - syn of: Clausilia bidentata abietina (D. Dupuy, 1850) - (CLAUSILIIDAE)
- llerae, Flabellina llerae J.A. Ortea, 1989 - (FLABELLINIDAE)
- llerae, Stiliger llerae J.A. Ortea, 1982 - (LIMAPONTIIDAE)
- llerai, Stiliger llerai J.A. Ortea, 1981 - syn of: Stiliger llerae J.A. Ortea, 1982 - (LIMAPONTIIDAE)
- llogaraensis, Sciocochlea llogaraensis A. Reischütz & P.L. Reischütz, 2009 - (CLAUSILIIDAE)
- llopisi, Trochoidea llopisi L. Gasull, 1981 - syn of: Amandana geyeri (L. Soós, 1926) - (HYGROMIIDAE)
- Llosaria, Genus Llosaria Quintana † (GASTROCHAENIDAE) (FOSSIL)
- lloydi, Cunearca lloydi A.A. Olsson, 1922 † - (ARCIDAE) (FOSSIL)
- lloydi, Seelya lloydi J. de C. Sowerby & Murchison, 1839 † - syn of: Ulrichospira lloydii (J. de C. Sowerby & Murchison, 1839 †) - (MURCHISONIIDAE) (FOSSIL)
- lloydi, Pleurotomaria lloydi de Sowerby & Murchison, 1839 † - syn of: Ulrichospira lloydii (J. de C. Sowerby & Murchison, 1839 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- lloydii, Bembexia lloydii de Sowerby & Murchison, 1839 † - syn of: Ulrichospira lloydii (J. de C. Sowerby & Murchison, 1839 †) - (EOTOMARIIDAE) (FOSSIL)
- lloydii, Ulrichospira lloydii (J. de C. Sowerby & Murchison, 1839 †) - (PHANEROTREMATIDAE) (FOSSIL)
- lloydii, Pleurotomaria lloydii de Sowerby & Murchison, 1839 † - syn of: Ulrichospira lloydii (J. de C. Sowerby & Murchison, 1839 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- lloydsmithi, Turritella lloydsmithi H.A. Pilsbry & J. Brown, 1917 † - (TURRITELLIDAE) (FOSSIL)
- lludrigaensis, Moitessieria lludrigaensis H.D. Boeters, 2003 - (MOITESSIERIIDAE)
- lluecai, Gyraulus lluecai (Royo Gómez, 1922) - (PLANORBIDAE)
- loaensis, Littoridina loaensis W.A. Biese, 1947 - (COCHLIOPIDAE)
- lobanovae, Aphanaia lobanovae Astafieva, 1989 † - (ATOMODESMATIDAE) (FOSSIL)
- lobanovae, Aviculopecten lobanovae Muromtseva, 1984 † - (AVICULOPECTINIDAE) (FOSSIL)
- Lobantale, Genus Lobantale Cossmann, 1888 † (GADILINIDAE) (FOSSIL)
- Lobaria, syn of: Genus Aglaja S.A. Renier, 1807 (AGLAJIDAE)
- Lobaria, syn of: Genus Philine P. Ascanius, 1772 (PHILINIDAE)
- Lobaria, syn of: Genus Sanguinolaria J.B.P.A. Lamarck, 1799 (PSAMMOBIIDAE)
- lobata, Aplysia lobata L.S.R. Bergh, 1908 - syn of: Aplysia parvula O.A.L. Mörch, 1863 - (APLYSIIDAE)
- lobata, Latiala lobata (B. Wade, 1926 †) - (APORRHAIDAE) (FOSSIL)
- lobata, Anadara lobata L.A. Reeve, 1844 - syn of: Anadara trapezia (G.P. Deshayes, 1839) - (ARCIDAE)
- lobata, Arca lobata L.A. Reeve, 1844 - syn of: Anadara trapezia (G.P. Deshayes, 1839) - (ARCIDAE)
- lobata, Trigonostoma lobata W.J. Swainson, 1840 - syn of: Trigonostoma tuberculosum (G.B. I Sowerby, 1832) - (CANCELLARIIDAE)
- lobata, Strophiops lobata C.J. Maynard & W.F. Clapp, 1921 - syn of: Cerion glans H.C. Küster, 1844 - (CERIONIDAE)
- lobata, Chama lobata W.J. Broderip, 1835 - (CHAMIDAE)
- lobata, Acostaea lobata A.E.J. Férussac, 1823 - syn of: Acostaea rivolii (G.P. Deshayes, 1827) - (ETHERIIDAE)
- lobata, Goniaeolis lobata N.H. Odhner, 1907 - syn of: Goniaeolis typica G.O. Sars, 1861 - (GONIAEOLIDIDAE)
- lobata, Drupina lobata (H.M.D. de Blainville, 1832) - (MURICIDAE)
- lobata, Purpura lobata H.M.D. de Blainville, 1832 - syn of: Drupina lobata (H.M.D. de Blainville, 1832) - (MURICIDAE)
- lobata, Perna lobata L.A. Reeve, 1858 - syn of: Isognomon nucleus (J.B.P.A. Lamarck, 1819) - (MYTILIDAE)
- lobata, Murdochella lobata R.N. Kilburn, 1985 - (NYSTIELLIDAE)
- lobata, Placuna lobata G.B. II Sowerby, 1871 - (PLACUNIDAE)
- lobata, Elysia lobata A.A. Gould, 1852 - (PLAKOBRANCHIDAE)
- lobata, Isognomon lobata L.A. Reeve, 1858 - syn of: Isognomon nucleus (J.B.P.A. Lamarck, 1819) - (PTERIIDAE)
- lobata, Lambis lobata P.F. Röding, 1798 - syn of: Lambis lambis (C. Linnaeus, 1758) - (STROMBIDAE)
- lobata, Ptychosyrinx lobata (G.B. III Sowerby, 1903) - (TURRIDAE)
- lobata, Xylophaga lobata J. Knudsen, 1961 - (XYLOPHAGAIDAE)
- lobatopsis, Clionella lobatopsis (K.H. Barnard, 1963) - (CLAVATULIDAE)
- lobatopsis, Ptychosyrinx lobatopsis K.H. Barnard, 1963 - syn of: Clionella lobatopsis (K.H. Barnard, 1963) - (TURRIDAE)
- lobatum, Dentalium lobatum G.B. II Sowerby, 1860 - syn of: Siphonodentalium lobatum (G.B. II Sowerby, 1860) - (DENTALIIDAE)
- lobatum, Siphonodentalium lobatum (G.B. II Sowerby, 1860) - (GADILIDAE)
- lobatum, Prolyelliceras lobatum F. Riedel, 1938 † - (PROLYELLICERATIDAE) (FOSSIL)
- lobatum, Catoraphiceras lobatum Ulrich & Foerste, 1936 † - (PROTOCYCLOCERATIDAE) (FOSSIL)
- lobatum, Pulsellum lobatum G.B. II Sowerby, 1860 - syn of: Siphonodentalium lobatum (G.B. II Sowerby, 1860) - (PULSELLIDAE)
- lobatum, Rioceras lobatum Flower, 1964 † - (RIOCERATIDAE) (FOSSIL)
- lobatum, Hardmanoceras lobatum Teichert & Glenister † - (TROCHOLITIDAE) (FOSSIL)
- lobatus, Polinices lobatus J. Marwick, 1924 † - (NATICIDAE) (FOSSIL)
- lobatus, Sphenodiscus lobatus (M. Tuomey, 1856 †) - (SPHENODISCIDAE) (FOSSIL)
- Lobatus, Genus Lobatus W.J. Swainson, 1837 (STROMBIDAE)
- lobatus, Tricornis lobatus P.F. Röding, 1798 - syn of: Sinustrombus sinuatus (J. Lightfoot, 1786) - (STROMBIDAE)
- lobatus, Strombus lobatus W.J. Swainson, 1823 - syn of: Lobatus raninus (J.F. Gmelin, 1791) - (STROMBIDAE)
- lobbeckeana, Lithophaga lobbeckeana R.W. Dunker, 1882 - syn of: Lithophaga plumula (S.C.T. Hanley, 1843) - (MYTILIDAE)
- lobbeckei, Obscurella lobbeckei W. Kobelt, 1902 - syn of: Cochlostoma obscurum (J.P.R. Draparnaud, 1801) - (COCHLOSTOMATIDAE)
- lobbii, Neopetraeus lobbii (L.A. Reeve, 1849) - (BULIMULIDAE)
- lobbii ptychostylus, Neopetraeus lobbii ptychostylus (L. Pfeiffer, 1858) - (BULIMULIDAE)
- Lobendoceras, Genus Lobendoceras Teichert & Glenister, 1954 † (PROTEROCAMEROCERATIDAE) (FOSSIL)
- lobensis, Octopus lobensis Z.J.A. De Castellanos & Menni, 1969 - syn of: Octopus tehuelchus D'Orbigny, 1834 - (OCTOPODIDAE)
- lobensis, Coelatura lobensis (L.S. Frierson, 1913) - (UNIONIDAE)
- lobettiana, Zoila lobettiana L. Raybaudi Massilia, 1995 - syn of: Zoila rosselli B.C. Cotton, 1948 - (CYPRAEIDAE)
- lobiancoi, Aplysia lobiancoi G.F. Mazzarelli, 1890 - syn of: Aplysia fasciata J.L.M. Poiret, 1789 - (APLYSIIDAE)
- Lobiancoia, syn of: Genus Cyerce L.S.R. Bergh, 1871 (CALIPHYLLIDAE)
- Lobifera, syn of: Genus Caliphylla A. da Costa, 1869 (CALIPHYLLIDAE)
- lobiferum, Beloitoceras lobiferum Flower, 1952 † - (ONCOCERATIDAE) (FOSSIL)
- Lobiga, syn of: Genus Lobiger A.D. Krohn, 1847 (OXYNOIDAE)
- Lobiger, Genus Lobiger A.D. Krohn, 1847 (OXYNOIDAE)
- LOBIGERIDAE - syn of Family: OXYNOIDAE
- lobini, Scissurella lobini (L.P. Burnay & E. Rolán, 1990) - (SCISSURELLIDAE)
- lobion, Cadulus lobion Gardner, 1947 † - (GADILIDAE) (FOSSIL)
- lobipennis, Onychoteuthis lobipennis W.H. Dall, 1871 - (ONYCHOTEUTHIDAE)
- lobitensis, Conus lobitensis S.D. Kaicher, 1977 - syn of: Varioconus aemulus (L.A. Reeve, 1844) - (CONIDAE)
- Lobites, Genus Lobites von Mojsisovics, 1875 † (LOBITIDAE) (FOSSIL)
- LOBITIDAE Mojsisovics, 1882 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-LOBITACEAE [Superfamily]) (FOSSIL)
- lobitoense, Elobiceras lobitoense Spath, 1922 † - (BRANCOCERATIDAE) (FOSSIL)
- lobitzeri, Trochotomaria lobitzeri J. Szabo, 2008 † - (PHYMATOPLEURIDAE) (FOSSIL)
- lobium, Mopalia lobium S.S. Berry, 1925 - (MOPALIIDAE)
- lobjanidzei, Pseudocrioceras lobjanidzei Kakabadze, 1981 † - (ANCYLOCERATIDAE) (FOSSIL)
- lobleyi, Cyrtodonta lobleyi Hicks, 1873 † - syn of: Cyrtodonta oboloidea (Hicks, 1873 †) - (CYRTODONTIDAE) (FOSSIL)
- lobleyi, Glyptarca lobleyi Hicks, 1873 † - syn of: Cyrtodonta oboloidea (Hicks, 1873 †) - (PARALLELODONTIDAE) (FOSSIL)
- Loboa, syn of: Genus Bulimulus W.E. Leach, 1814 (BULIMULIDAE)
- Loboarochiton, Genus Loboarochiton † (NEOLORICATA (UNASSIGNED)) (FOSSIL)
- Lobobactrites, Genus Lobobactrites Schindewolf , 1932 † (BACTRITIDAE) (FOSSIL)
- Lobocyclendoceras, Genus Lobocyclendoceras † (ENDOCERIDA (UNASSIGNED)) (FOSSIL)
- Lobodactylites, Genus Lobodactylites Buckman, 1926 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Lobogenes, Genus Lobogenes H.A. Pilsbry & J.C. Bequaert, 1927 (HYDROBIIDAE)
- loboi, Turbonilla loboi A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- Lobokosmoceras, Genus Lobokosmoceras Buckman, 1923 † (KOSMOCERATIDAE) (FOSSIL)
- Lobokosmokeras, syn of: Genus Lobokosmoceras Buckman, 1923 † (KOSMOCERATIDAE) (FOSSIL)
- Lobolytoceras, Genus Lobolytoceras Buckman, 1923 † (LYTOCERATIDAE) (FOSSIL)
- Loboplax, syn of: Genus Notoplax H. Adams, 1861 (ACANTHOCHITONIDAE)
- Lobosculum, Subgenus Daedalochila (Lobosculum) H.A. Pilsbry, 1930 (POLYGYRIDAE)
- Lobosiphon, Genus Lobosiphon Flower 1956 (PROTEROCAMEROCERATIDAE) (FOSSIL)
- Lobosphinctes, Genus Lobosphinctes Buckman, 1923 † (PERISPHINCTIDAE) (FOSSIL)
- lobostoma, Pseudamnicola lobostoma H. Schütt in H. Schütt & Besenecker, 1973 † - (HYDROBIIDAE) (FOSSIL)
- Lobotornoceras, Genus Lobotornoceras Schindewolf , 1936 † (TORNOCERATIDAE) (FOSSIL)
- lobula, Jupiteria lobula (W.H. Dall, 1908) - (NUCULANIDAE)
- lobula, Nuculana lobula W.H. Dall, 1908 - syn of: Jupiteria lobula (W.H. Dall, 1908) - (NUCULANIDAE)
- lobulata, Parvilucina lobulata (G.P. Deshayes, 1857 †) - (LUCINIDAE) (FOSSIL)
- lobulatum, Laevicardium lobulatum (G.P. Deshayes, 1855) - (CARDIIDAE)
- lobulatum, Uraloceras lobulatum Armstrong & al., 1967 † - syn of: Archboldiceras lobulatum (Armstrong & al., 1967 †) - (PARAGASTRIOCERATIDAE) (FOSSIL)
- lobulatum, Archboldiceras lobulatum (Armstrong & al., 1967 †) - (SPIROLEGOCERATIDAE) (FOSSIL)
- loca, Purpura loca D'Orbigny, 1846 - syn of: Concholepas concholepas (J.G. Bruguière, 1789) - (MURICIDAE)
- localis, Nuculana localis Konova, 1984 † - syn of: Nuculana pennula (M. Yokoyama, 1925 †) - (NUCULANIDAE) (FOSSIL)
- locardi, Argna locardi J.R. Bourguignat - syn of: Argna biplicata (A. Michaud, 1831) - (ARGNIDAE)
- locardi, Aphanitoma locardi (A.R.J.B. Bavay, 1906) - (BORSONIIDAE)
- locardi, Cerithium locardi T.A. de M. Monterosato, 1910 - syn of: Cerithium renovatum T.A. de M. Monterosato, 1884 - (CERITHIIDAE)
- locardi, Cochlicopa locardi C. Pollonera, 1885 - syn of: Cochlicopa lubrica (O.F. Müller, 1774) - (COCHLICOPIDAE)
- locardi, Scabrina locardi J.F. Mabille, 1887 - (CYCLOPHORIDAE)
- locardi, Dreissena locardi É.A.A. Locard, 1893 - syn of: Dreissena polymorpha (P.S. Pallas, 1771) - (DREISSENIDAE)
- locardi, Zebrina locardi J.R. Bourguignat, 1881 - syn of: Zebrina detrita (O.F. Müller, 1774) - (ENIDAE)
- locardi, Fusinus locardi P.M. Pallary, 1904 - syn of: Fusinus rostratus (A.G. Olivi, 1792) - (FASCIOLARIIDAE)
- locardi, Belgrandia locardi A. Bofill in F. Haas, 1925 - syn of: Belgrandia marginata (A. Michaud, 1831) - (HYDROBIIDAE)
- locardi, Chambardia locardi P.M. Pallary, 1909 - syn of: Chambardia letourneuxi G. Servain, 1890 - (IRIDINIDAE)
- locardi, Lymnaea locardi G. Coutagne in É.A.A. Locard, 1893 - syn of: Lymnaea stagnalis (C. Linnaeus, 1758) - (LYMNAEIDAE)
- locardi, Eastonia locardi M.P. d'Oliveira, 1895 † - syn of: Eastonia rugosa (G.S. Helbling, 1779 †) - (MACTRIDAE) (FOSSIL)
- locardi, Melanopsis locardi Blanckenhorn, 1897 - (MELANOPSIDAE)
- locardi, Moitessieria locardi G. Coutagne, 1883 - (MOITESSIERIIDAE)
- locardi, Panacca locardi (W.H. Dall, 1903) - (PARILIMYIDAE)
- locardi, Pholadomya locardi W.H. Dall, 1903 - syn of: Panacca locardi (W.H. Dall, 1903) - (PHOLADOMYIDAE)
- locardi, Guestieria locardi F.P. Jousseaume, 1887 - (SCOLODONTIDAE)
- locardi, Turris locardi A.R.J.B. Bavay, 1906 - syn of: Aphanitoma locardi (A.R.J.B. Bavay, 1906) - (TURRIDAE)
- locardi, Anodonta locardi J.R. Bourguignat, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- locardi, Phenacolimax locardi (C. Pollonera, 1884) - (VITRINIDAE)
- Locardia, syn of: Subgenus Paladilhia (Lhotelleria) J.R. Bourguignat, 1877 (MOITESSIERIIDAE)
- locardiana, Trochulus locardiana P. Fagot - syn of: Trichia hispida (C. Linnaeus, 1758) - (HYGROMIIDAE)
- locardiana, Chambardia locardiana G. Servain, 1890 - syn of: Chambardia letourneuxi G. Servain, 1890 - (IRIDINIDAE)
- locardiana, Fagotia locardiana J.R. Bourguignat, 1884 - syn of: Esperiana esperi (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- locardiana, Lavigeria locardiana (J.R. Bourguignat, 1885) - (PALUDOMIDAE)
- locardiana, Grandidieria burtoni locardiana J.R. Bourguignat, 1885 - (UNIONIDAE)
- locarnus, Melanopsis locarnus A. Guirao, 1854 - syn of: Melanopsis lorcana A. Guirao, 1854 - (MELANOPSIDAE)
- locator, Salpingostoma locator (d''Eichwald, 1860 †) - (BUCANIIDAE) (FOSSIL)
- locellus, Rhipidodonta variabilis locellus (I. Lea, 1859) - (HYRIIDAE)
- locellus, Natica locellus L.A. Reeve, 1855 - syn of: Notocochlis gualteriana (C.A. Récluz, 1844) - (NATICIDAE)
- locellus, Unio locellus I. Lea, 1866 - syn of: Rhipidodonta variabilis (W.G. Maton, 1811) - (UNIONIDAE)
- Lochea, syn of: Genus Arion A.E.J. Férussac, 1819 (ARIONIDAE)
- lochense, Taramelliceras lochense (Oppel, 1863 †) - (OPPELIIDAE) (FOSSIL)
- lochi, Chromodoris lochi W.B. Rudman, 1982 - (CHROMODORIDIDAE)
- lochi, Dentalium lochi K.L. Lamprell & J.M. Healy, 1998 - (DENTALIIDAE)
- lochi, Epifungium lochi (E. Gittenberger & J. Goud, 2000) - (EPITONIIDAE)
- lochi, Granulifusus lochi R. Hadorn & K. Fraussen, 2005 - (FASCIOLARIIDAE)
- lochi, Austropyrgus lochi A. Clark, W.B. Miller & W.F. Ponder, 2003 - (HYDROBIIDAE)
- lochi, Daphnellopsis lochi R. Houart, 2013 - (MURICIDAE)
- lochi, Enixotrophon lochi (B.A. Marshall & R. Houart, 2011) - (MURICIDAE)
- lochi, Nassarius lochi H.H. Kool, 1996 - (NASSARIIDAE)
- lochi, Dosinia lochi J.M. Healy & K.L. Lamprell, 1992 - (VENERIDAE)
- lochi, Stosicia lochi W.J. Sleurs, 1996 - (ZEBINIDAE)
- lochii, Amalda lochii T. Ninomiya, 1990 - (ANCILLARIIDAE)
- lochinvarensis, Peruvispira lochinvarensis C.O. Waterhouse, 1987 † - (GOSSELETINIDAE) (FOSSIL)
- lochkoviana, Paranowakia lochkoviana Lukes, 1985 † - (PARANOWAKIIDAE) (FOSSIL)
- lochkoviensis, Murchisonia lochkoviensis Frýda & Manda, 1997 † - (MURCHISONIIDAE) (FOSSIL)
- lockei, Verticordia lockei Ward & B.W. Blackwelder, 1987 † - (VERTICORDIIDAE) (FOSSIL)
- lockensis, Pyrgulopsis lockensis R. Hershler, 1998 - (HYDROBIIDAE)
- locklini, Limaria locklini (J.T.L. McGinty, 1955) - (LIMIDAE)
- locklini, Glabrocythara locklini A.A. Olsson & A. Harbison, 1953 † - (MANGELIIDAE) (FOSSIL)
- locklini, Nassarius locklini A.A. Olsson & A. Harbison, 1953 † - (NASSARIIDAE) (FOSSIL)
- locklini, Pachyoliva locklini A.A. Olsson, 1956 † - (OLIVELLIDAE) (FOSSIL)
- locklini, Orinella locklini P. Bartsch, 1955 † - (PYRAMIDELLIDAE) (FOSSIL)
- locklini, Anticlimax locklini H.A. Pilsbry & A.A. Olsson, 1950 - (TORNIDAE)
- locklini, Hystrivasum locklini (A.A. Olsson & A. Harbison, 1953 †) - (TURBINELLIDAE) (FOSSIL)
- lockyerana, Doris lockyerana E.F. Kelaart, 1859 - (DORIDIDAE)
- lockyeri, Attenuata lockyeri (C. Hedley, 1911) - (RISSOIDAE)
- locolocoensis, Calliotropis locolocoensis Hickman, 2016 - (CALLIOTROPIDAE)
- Loculitheca, Genus Loculitheca Sysoev , 1968 † (TURCUTHECIDAE) (FOSSIL)
- loculosa, Manaria loculosa Fraussen & Stahlschmidt, 2016 - (BUCCINIDAE)
- loculosa, Dentarene loculosa (Gould, 1862) - (LIOTIIDAE)
- loculosa, Catinella oklahomarum loculosa G.R. Webb, 1954 - (SUCCINEIDAE)
- loculosa, Gibbula loculosa A.A. Gould, 1861 - (TROCHIDAE)
- locumtenens, Leptoconus locumtenens (J.F. Blumenbach, 1791) - (CONIDAE)
- locumtenens, Conus locumtenens P.F. Röding, 1798 - syn of: Strategoconus generalis (C. Linnaeus, 1767) - (CONIDAE)
- locumtenens assilorenzoi, Leptoconus locumtenens assilorenzoi (T. Cossignani & A. Assi, 2016) - (CONIDAE)
- locumtenens biggii, Leptoconus locumtenens biggii (T. Cossignani & A. Assi, 2016) - (CONIDAE)
- locumtenens linae, Leptoconus locumtenens linae (T. Cossignani & A. Assi, 2016) - (CONIDAE)
- locumtenens linae hafunensis, Leptoconus locumtenens linae hafunensis T. Cossignani & A. Assi, 2016 - syn of: Leptoconus locumtenens linae (T. Cossignani & A. Assi, 2016) - (CONIDAE)
- locuples, Striodostomia locuples C.R. Laws, 1940 † - (PYRAMIDELLIDAE) (FOSSIL)
- locuples, Mormulasta locuples (C.R. Laws, 1937 †) - (PYRAMIDELLIDAE) (FOSSIL)
- locus, Murex locus J.I. Molina, 1792 - syn of: Concholepas concholepas (J.G. Bruguière, 1789) - (MURICIDAE)
- loczy, Phylloceras loczy Suess , 1865 † - (PHYLLOCERATIDAE) (FOSSIL)
- Loczyceras, Subgenus Rehmannia (Loczyceras) Bourquin, 1968 † (REINECKEIIDAE) (FOSSIL)
- loczyi, Euphaedusa loczyi (O. Böttger, 1884) - (CLAUSILIIDAE)
- loczyi, Tetraspidoceras loczyi Géczy, 1998 † - (COELOCERATIDAE) (FOSSIL)
- loczyi, Dendroconus loczyi Erünal-Erentöz, 1958 † - (CONIDAE) (FOSSIL)
- loczyi, Aquilofusus loczyi J. Noszky, 1936 † - (FASCIOLARIIDAE) (FOSSIL)
- loczyi, Micromelania loczyi Lörenthey, 1894 † - (HYDROBIIDAE) (FOSSIL)
- loczyi, Segmentina loczyi (Lörenthey, 1906 †) - (PLANORBIDAE) (FOSSIL)
- loczyi, Confusionella loczyi (Bittner, 1901 †) - (PTERIIDAE) (FOSSIL)
- loczyi, Pleuronautilus loczyi Fliegel, 1901 † - (TAINOCERATIDAE) (FOSSIL)
- loczyi, Viviparus loczyi Halaváts, 1903 † - (VIVIPARIDAE) (FOSSIL)
- loczyi acanthula, Euphaedusa loczyi acanthula (P.M. Heude, 1882) - (CLAUSILIIDAE)
- loczyi anterior, Segmentina loczyi anterior (Sauerzopf, 1953 †) - (PLANORBIDAE) (FOSSIL)
- loczyi pagnucciana, Euphaedusa loczyi pagnucciana (P.M. Heude, 1888) - (CLAUSILIIDAE)
- loczyi parietaria, Euphaedusa loczyi parietaria (P.B. Schmacker & O. Böttger, 1890) - (CLAUSILIIDAE)
- loczyi uniplicata, Euphaedusa loczyi uniplicata H. Nordsieck, 2012 - (CLAUSILIIDAE)
- Lodanaria, Genus Lodanaria Dahmer, 1925 † (MURCHISONIIDAE) (FOSSIL)
- lodanensis, Pustularia lodanensis Schilder, 1937 † - (CYPRAEIDAE) (FOSSIL)
- lodderae, Scalenostoma lodderae (W.F. Petterd, 1884) - (EULIMIDAE)
- lodderae, Eulima lodderae (M. Lodder, 1900 ex R. Tate MS) - (EULIMIDAE)
- lodderae, Eulima lodderae M. Lodder, 1900 ex R. Tate MS - syn of: Eulima lodderae (M. Lodder, 1900 ex R. Tate MS) - (EULIMIDAE)
- lodderae, Stilifer lodderae W.F. Petterd, 1884 - syn of: Scalenostoma lodderae (W.F. Petterd, 1884) - (EULIMIDAE)
- lodderae, Zeidora lodderae (R. Tate & W.L. May, 1900) - (FISSURELLIDAE)
- lodderae, Beddomeia lodderae W.F. Petterd, 1889 - (HYDROBIIDAE)
- lodderae, Marginella lodderae W.L. May, 1911 - syn of: Dentimargo kemblensis (C. Hedley, 1903) - (MARGINELLIDAE)
- lodderae, Lodderia lodderae (W.F. Petterd, 1884) - (SKENEIDAE)
- Lodderena, Genus Lodderena T. Iredale, 1924 (SKENEIDAE)
- Lodderia, Genus Lodderia R. Tate, 1899 (SKENEIDAE)
- lodiensis, Orthonychia lodiensis J.W. Hall 1843 † - (ORTHONYCHIIDAE) (FOSSIL)
- lodiensis, Palaeocapulus lodiensis F.B. Meek, 1871 † - syn of: Palaeocapulus acutirostre (J.W. Hall, 1856 †) - (PLATYCERATIDAE) (FOSSIL)
- lodosi, Vitrea lodosi F. Riedel, 1984 - (PRISTILOMATIDAE)
- loebbeckeana, Lyncina loebbeckeana H.C. Weinkauff, 1881 - syn of: Lyncina carneola (C. Linnaeus, 1758) - (CYPRAEIDAE)
- loebbeckeana, Mactra loebbeckeana H.C. Weinkauff, 1881 - syn of: Mactromeris polynyma (W. Stimpson, 1860) - (MACTRIDAE)
- loebbeckeana, Cryptospira loebbeckeana H.C. Weinkauff, 1878 - syn of: Cryptospira glauca loebbeckeana H.C. Weinkauff, 1878 - (MARGINELLIDAE)
- loebbeckeana, Cryptospira glauca loebbeckeana H.C. Weinkauff, 1878 - (MARGINELLIDAE)
- loebbeckeana, Simnia loebbeckeana (H.C. Weinkauff, 1881) - (OVULIDAE)
- loebbeckeana, Ovula loebbeckeana H.C. Weinkauff, 1881 - syn of: Simnia loebbeckeana (H.C. Weinkauff, 1881) - (OVULIDAE)
- loebbeckeana, Terebra loebbeckeana R.W. Dunker, 1877 - syn of: Cinguloterebra lima (G.P. Deshayes, 1857) - (TEREBRIDAE)
- loebbeckeanus, Conus loebbeckeanus H.C. Weinkauff, 1873 - syn of: Vituliconus ferrugineus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- loebbeckeanus, Mitra loebbeckeanus H.C. Weinkauff, 1887 - syn of: Dibaphus multiplicata (W.H. Pease, 1865) - (MITRIDAE)
- loebbeckei, Nipponocrassatella loebbeckei W. Kobelt, 1886 - syn of: Nipponocrassatella nana (A. Adams & L.A. Reeve, 1850) - (CRASSATELLIDAE)
- loebbeckei, Peristernia loebbeckei (H.C. Küster & W. Kobelt, 1876) - (FASCIOLARIIDAE)
- loebbeckei, Fusus loebbeckei W. Kobelt, 1880 - syn of: Fusinus albinus (A. Adams, 1856) - (FASCIOLARIIDAE)
- loebbeckei, Pterynotus loebbeckei (W. Kobelt, 1879) - (MURICIDAE)
- loebbeckei, Trophon loebbeckei W. Kobelt & H.C. Küster, 1878 - syn of: Xymenopsis muriciformis (P.P. King, 1832) - (MURICIDAE)
- loebbeckei, Cymatium loebbeckei C.E. Lischke, 1870 - syn of: Turritriton labiosus (Wood, 1828) - (RANELLIDAE)
- loebbeckei, Melanoides loebbeckei (A. Brot) - (THIARIDAE)
- loebbeckei, Turbinella loebbeckei H.C. Küster & W. Kobelt, 1876 - syn of: Peristernia loebbeckei (H.C. Küster & W. Kobelt, 1876) - (TURBINELLIDAE)
- loebbeckii, Stenomelania loebbeckii (A. Brot, 1877) - (THIARIDAE)
- loebeckeana, Mitra loebeckeana H.C. Weinkauff, 1887 - syn of: Dibaphus multiplicata (W.H. Pease, 1865) - (MITRIDAE)
- loeblichi, Praedaraelites loeblichi (Miller & Furnish, 1940 †) - (DARAELITIDAE) (FOSSIL)
- loegteri, Tropaeum loegteri Kemper, 1964 † - (ANCYLOCERATIDAE) (FOSSIL)
- loehensis, Corbicula loehensis J.H. Kruimel, 1913 - (CYRENIDAE)
- loehrii, Greggelix loehrii (W.M. Gabb, 1867) - (HELMINTHOGLYPTIDAE)
- loei, Leptopoma loei L. Pfeiffer, 1858 - (CYCLOPHORIDAE)
- loei, Hypselostoma loei S. Panha & Prateespasen, 2005 - (HYPSELOSTOMATIDAE)
- loeiense, Bamyaniceras loeiense Ishibashi & al., 1996 † - (MEDLICOTTIIDAE) (FOSSIL)
- loeiensis, Sinoennea loeiensis K. Tanmuangpak & S. Tumpeesuwan, 2015 - (DIAPHERIDAE)
- loeli, Pycnodonte loeli (L.G. Hertlein, 1927 †) - (GRYPHAEIDAE) (FOSSIL)
- loeli, Ostrea loeli L.G. Hertlein, 1927 † - syn of: Pycnodonte loeli (L.G. Hertlein, 1927 †) - (OSTREIDAE) (FOSSIL)
- Loemmelella, Subgenus Daonella (Loemmelella) Turculet, 1972 (DAONELLIDAE) (FOSSIL)
- loennbergii, Onykia loennbergii (M. Ishikawa & Wakiya, 1914) - (ONYCHOTEUTHIDAE)
- loensis, Corbicula loensis M. Djajasasmita, 1977 - syn of: Corbicula loehensis J.H. Kruimel, 1913 - (CYRENIDAE)
- loeryi, Macroceramus loeryi E.R. Jacobson, 1955 - (UROCOPTIDAE)
- loescheri, Boehmoceras loescheri Morton, 1834 † - syn of: Boehmoceras arculus (Morton, 1834 †) - (BACULITIDAE) (FOSSIL)
- loeschmanni, Tornoceras loeschmanni Frech, 1897 † - syn of: Linguatornoceras guestfalicum (Frech, 1897 †) - (TORNOCERATIDAE) (FOSSIL)
- loessica, Pupilla loessica V. Ložek, 1954 - (PUPILLIDAE)
- loeve, Osperleioceras loeve (Gabilly, 1976 †) - (HILDOCERATIDAE) (FOSSIL)
- loeve, Esericeras loeve Gabilly, 1976 † - syn of: Osperleioceras loeve (Gabilly, 1976 †) - (PHYMATOCERATIDAE) (FOSSIL)
- loeviana, Smithiella loeviana L.A. Reeve, 1845 - syn of: Mangelia costulata A. Risso, 1826 - (MANGELIIDAE)
- loeviana, Pleurotoma loeviana L.A. Reeve, 1845 - syn of: Mangelia costulata A. Risso, 1826 - (TURRIDAE)
- loewii, Jaminia loewii R.A. Philippi, 1844 - (ENIDAE)
- loewii, Jaminia loewii E.A. Rossmässler, 1859 - syn of: Jaminia quadridens elongata (A. Moquin-Tandon, 1856) - (ENIDAE)
- loewii godetiana, Jaminia loewii godetiana W. Kobelt, 1899 - (ENIDAE)
- lofasi, Panormella lofasi O.G. Costa, 1840 - syn of: Cyclope pellucida A. Risso, 1826 - (NASSARIIDAE)
- lofotense, Siphonodentalium lofotense G.O. Sars, 1865 - syn of: Pulsellum lofotense (G.O. Sars, 1865) - (GADILIDAE)
- lofotense, Pulsellum lofotense (G.O. Sars, 1865) - (PULSELLIDAE)
- lofouana, Plectotropis lofouana (O.F. von Möllendorff, 1888) - (BRADYBAENIDAE)
- lofti, Trochomorpha lofti A. Delsaerdt, 2016 - (TROCHOMORPHIDAE)
- loftusiana, Arca loftusiana Howse, 1848 † - syn of: Parallelodon striatus (von Schlotheim, 1816 †) - (ARCIDAE) (FOSSIL)
- loftusianus, Chiton loftusianus King, 1848 † - syn of: Cymatochiton loftusianus (King, 1848 †) - (CHITONIDAE) (FOSSIL)
- loftusianus, Cymatochiton loftusianus (King, 1848 †) - (ISCHNOCHITONIDAE) (FOSSIL)
- loganensis, Proplina loganensis Lochman & Hu, 1962 † - (TRYBLIDIIDAE) (FOSSIL)
- logani, Ctenodonta logani Salter, 1859 † - (CTENODONTIDAE) (FOSSIL)
- logani, Endoceras logani Ulrich & al., 1944 † - (ENDOCERATIDAE) (FOSSIL)
- logani, Maclurina logani (Salter, 1852 †) - (MACLURITIDAE) (FOSSIL)
- logani, Crassispira logani A. Dey, 1961 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- loganii, Cyrtostropha loganii J.W. Hall, 1852 † - syn of: Cyrtostropha macrospira (J.W. Hall, 1852 †) - (MURCHISONIIDAE) (FOSSIL)
- Loganiopharynx, Genus Loganiopharynx W.A. Wenz, 1919 (HYGROMIIDAE)
- Loganoceras, Genus Loganoceras Foerste, 1932 † (ONCOCERATIDAE) (FOSSIL)
- logvinenkoi, Caspia logvinenkoi (A.N. Golikov & Y.I. Starobogatov, 1966) - (HYDROBIIDAE)
- lohabea, Gulella lohabea K.C. Emberton, 2001 - (STREPTAXIDAE)
- lohaliensis, Poromya lohaliensis Kirkland, 1996 † - (POROMYIDAE) (FOSSIL)
- lohestoe, Bellerophon lohestoe de Koninck, 1883 † - (BELLEROPHONTIDAE) (FOSSIL)
- lohrheimi, Murchisonia lohrheimi Heidelberger, 2001 † - (MURCHISONIIDAE) (FOSSIL)
- lohri, Caecum lohri A.M. Strong & L.G. Hertlein, 1939 - (CAECIDAE)
- lohri, Cerithiopsis lohri H.K. Jordan, 1936 - (CERITHIOPSIDAE)
- lohri, Darioconus lohri (R.N. Kilburn, 1972) - (CONIDAE)
- lohri, Patinopecten lohri L.G. Hertlein, 1928 † - (PECTINIDAE) (FOSSIL)
- loi, Coriophora loi (C. Chen, C.F. Tseng & L.C. Lo, 2012) - (TRIPHORIDAE)
- loiclegoffi, Turbonilla loiclegoffi A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- loisae, Aeneator loisae H.A. Rehder, 1971 - (BUCCINIDAE)
- loisae, Mitrella loisae W.D. Pitt & R. Kohl, 1979 - (COLUMBELLIDAE)
- loisae, Euplica loisae H.A. Rehder, 1980 - (COLUMBELLIDAE)
- loisae, Austroharpa loisae H.A. Rehder, 1973 - (HARPIDAE)
- loisae, Rhizorus loisae † - (RHIZORIDAE) (FOSSIL)
- loisae, Scaphander loisae H.R. Bullis, 1956 - (SCAPHANDRIDAE)
- loisae, Hastulopsis loisae (E.A. Smith, 1903) - (TEREBRIDAE)
- loisae, Triphora loisae H.A. Rehder, 1980 - (TRIPHORIDAE)
- loiseli, Clavilithes loiseli Chédeville, 1904 † - (FASCIOLARIIDAE) (FOSSIL)
- loiselieri, Clathromangelia loiselieri J.J. Oberling, 1970 - (CLATHURELLIDAE)
- Loisthodon, Genus Loisthodon F.M. Climo, 1989 (CHAROPIDAE)
- loja, Strioterebrum loja H.A. Pilsbry & A.A. Olsson, 1941 † - (TEREBRIDAE) (FOSSIL)
- lokaroensis, Joculator lokaroensis A. Cecalupo & I. Perugia, 2014 - (CERITHIOPSIDAE)
- lokei, Colpomya lokei Liljedahl, 1994 † - (MODIOMORPHIDAE) (FOSSIL)
- lokii, Tonicella lokii K.B. Clark, 1999 - (MOPALIIDAE)
- Lokuticeras, Genus Lokuticeras Galacz, 1994 † (STEPHANOCERATIDAE) (FOSSIL)
- lolae, Bulimulus lolae P.H. Scott, 1967 - (BULIMULIDAE)
- Lolidona, syn of: Genus Histioteuthis D'Orbigny, 1842 in A.E.J. Férussac & D'Orbigny, 1834 (HISTIOTEUTHIDAE)
- loligera, Onychoteuthis loligera J.J.S. Steenstrup, 1875 - syn of: Lycoteuthis lorigera (J.J.S. Steenstrup, 1875) - (ONYCHOTEUTHIDAE)
- LOLIGINIDAE Lesueur, 1821 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-MYOPSIDA [Order])
- loliginiformis, Sepioteuthis loliginiformis (W.P.E.S. Rüppell & F.S. Leuckart, 1828) - (LOLIGINIDAE)
- Loligo, Genus Loligo J.B.P.A. Lamarck, 1798 (LOLIGINIDAE)
- loligo, Sepia loligo C. Linnaeus, 1758 - syn of: Loligo vulgaris J.B.P.A. Lamarck, 1798 - (SEPIIDAE)
- Loligopsis, Genus Loligopsis J.B.P.A. Lamarck, 1822 (IDIOSEPIIDAE)
- Loligosepia, Genus Loligosepia Quenstedt , 1839 † (LOLIGOSEPIIDAE) (FOSSIL)
- LOLIGOSEPIIDAE Altena, 1949 † - Family (CEPHALOPODA-COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-LOLIGOSEPIIDA [Order]) (FOSSIL)
- Lolimnites, syn of: Genus Ommastrephes D'Orbigny, 1834 (OMMASTREPHIDAE)
- Loliolopsis, syn of: Genus Lolliguncula J.J.S. Steenstrup, 1881 (LOLIGINIDAE)
- Loliolus, Genus Loliolus J.J.S. Steenstrup, 1856 (LOLIGINIDAE)
- Lolliguncula, Genus Lolliguncula J.J.S. Steenstrup, 1881 (LOLIGINIDAE)
- lolouense, Submeekoceras lolouense Chao, 1959 † - syn of: Submeekoceras hsuyuchieni (Chao, 1959 †) - (ARCTOCERATIDAE) (FOSSIL)
- lolouensis, Pseudoprosphingites lolouensis (Chao, 1959 †) - (MELAGATHICERATIDAE) (FOSSIL)
- lolouensis, Pseudaspidites lolouensis Chao, 1959 † - syn of: Pseudaspidites muthianus (Krafft & Diener, 1909 †) - (PROPTYCHITIDAE) (FOSSIL)
- lomaense, Lirobittium lomaense (P. Bartsch, 1911) - (CERITHIIDAE)
- lomaensis, Haliotis lomaensis Anderson, 1902 † - (HALIOTIDAE) (FOSSIL)
- lomaensis, Leda lomaensis W.H. Dall, 1916 - syn of: Nuculana minuta (O.F. Müller, 1776) - (NUCULANIDAE)
- lomaensis, Zonitarion lomaensis G.A. de Mol, 1970 - (UROCYCLIDAE)
- lomakini, Amuranodonta lomakini F. Zatrawkin & V.V. Bogatov, 1987 - syn of: Anemina arcaeformis (P.M. Heude, 1877) - (UNIONIDAE)
- lomakini, Buldowskia lomakini F. Zatrawkin & V.V. Bogatov, 1987 - syn of: Anemina arcaeformis (P.M. Heude, 1877) - (UNIONIDAE)
- lomaloana, Rissoina lomaloana H.S. Ladd, 1966 † - (RISSOINIDAE) (FOSSIL)
- lomamiensis, Achatina lomamiensis T.E. Crowley & T. Pain - (ACHATINIDAE)
- lomamiensis, Quenstedtia lomamiensis L.R. Cox, 1960 † - (QUENSTEDTIIDAE) (FOSSIL)
- lomana, Trichotropis lomana W.H. Dall, 1918 - syn of: Provanna lomana (W.H. Dall, 1918) - (CAPULIDAE)
- lomana, Niso lomana P. Bartsch, 1917 - (EULIMIDAE)
- lomana, Haliella lomana W.H. Dall, 1908 - syn of: Eulimella lomana (W.H. Dall, 1908) - (EULIMIDAE)
- lomana, Eulima lomana W.H. Dall, 1908 - syn of: Eulimella lomana (W.H. Dall, 1908) - (EULIMIDAE)
- lomana, Provanna lomana (W.H. Dall, 1918) - (PROVANNIDAE)
- lomana, Eulimella lomana (W.H. Dall, 1908) - (PYRAMIDELLIDAE)
- lomandraensis, Denayella lomandraensis Cook & Camilleri, 1997 † - (EOTOMARIIDAE) (FOSSIL)
- LOMANOTIDAE Bergh, 1890 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order]-TRITONIOIDEA [Superfamily])
- Lomanotus, Genus Lomanotus J.B. Vérany, 1844 (LOMANOTIDAE)
- lomasdesamba, Arca lomasdesamba C.J. Maury, 1917 † - (ARCIDAE) (FOSSIL)
- Lomastoma, syn of: Subgenus Megalomastoma (Neopupina) W. Kobelt, 1902 (MEGALOMASTOMIDAE)
- Lomasulcachites, Genus Lomasulcachites Qian & Jiang, 1982 † (SIPHOGONUCHITIDAE) (FOSSIL)
- lomata, Crassispira lomata W.P. Woodring, 1928 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- lombardica, Pseudomyoconcha lombardica (J. Von Hauer, 1857 †) - (KALENTERIDAE) (FOSSIL)
- lombardicum, Dentalium lombardicum E.A.L. Kittl, 1899 † - (DENTALIIDAE) (FOSSIL)
- Lombardiella, syn of: Genus Neostyriaca A. Wagner, 1920 (CLAUSILIIDAE)
- lombardii, Lindaconus lombardii J.R. Hendricks, 2015 † - (CONIDAE) (FOSSIL)
- lombardii, Allogona lombardii M. Smith, 1943 - (POLYGYRIDAE)
- lombei, Conus lombei G.B. III Sowerby, 1881 - syn of: Conasprella articulata (G.B. III Sowerby, 1873) - (CONIDAE)
- lomboke, Vasticardium lomboke E. Vidal, 2003 - (CARDIIDAE)
- lombricoides, Deroceras lombricoides P.M.A. Morelet, 1845 - (AGRIOLIMACIDAE)
- lomejkoi, Viviparus lomejkoi P.S. Pavlovic, 1932 † - (VIVIPARIDAE) (FOSSIL)
- lomensis, Lyrodus lomensis P. Bartsch, 1927 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- Lomia, Genus Lomia † (THECOSOMATA (UNASSIGNED)) (FOSSIL)
- lomica, Belgrandiella lomica D.G. Georgiev & P. Glöer, 2015 - (HYDROBIIDAE)
- Lomirosa, Genus Lomirosa Stephenson, 1941 † (MELONGENIDAE) (FOSSIL)
- lomitensis, Crassatella lomitensis I.M. Oldroyd, 1924 - syn of: Eucrassatella fluctuata (Carpenter, 1864) - (CRASSATELLIDAE)
- lomitensis, Eucrassatella lomitensis I.M. Oldroyd, 1924 - syn of: Eucrassatella fluctuata (Carpenter, 1864) - (CRASSATELLIDAE)
- lomitensis, Crassatella lomitensis I.M. Oldroyd, 1924 - syn of: Eucrassatella fluctuata (Carpenter, 1864) - (CRASSATELLIDAE)
- lomitensis, Lucina lomitensis A.A. Olsson, 1931 † - (LUCINIDAE) (FOSSIL)
- lomitensis, Solemya lomitensis A.A. Olsson, 1931 † - (SOLEMYIDAE) (FOSSIL)
- lommeli, Daonella lommeli (Wissmann, 1841 †) - (DAONELLIDAE) (FOSSIL)
- lommeli, Halobia lommeli Wissmann, 1841 † - syn of: Daonella lommeli (Wissmann, 1841 †) - (HALOBIIDAE) (FOSSIL)
- lommeli, Polygyrina lommeli (Wissmann, 1841 †) - (POLYGYRINIDAE) (FOSSIL)
- lommeli, Polygyrina lommeli (Münster, 1841 †) - (POLYGYRINIDAE) (FOSSIL)
- lommelii, Turritella lommelii Wissmann, 1841 † - syn of: Polygyrina lommeli (Wissmann, 1841 †) - (TURRITELLIDAE) (FOSSIL)
- lomnickii, Melanopsis lomnickii W.A. Wenz, 1928 † - (MELANOPSIDAE) (FOSSIL)
- lomonea, Codakia lomonea W.P. Woodring, 1925 † - (LUCINIDAE) (FOSSIL)
- Lomonossovella, Genus Lomonossovella † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- lomonti, Trochomorpha lomonti (J.W. Brazier, 1877) - (TROCHOMORPHIDAE)
- lomonti, Zonites lomonti J.W. Brazier, 1876 - (ZONITIDAE)
- lompocensis, Amusium lompocensis R. Arnold, 1907 † - (PECTINIDAE) (FOSSIL)
- lonca, Catriona lonca Er. Marcus, 1965 - (TRINCHESIIDAE)
- Lonchaeus, syn of: Genus Pyramidella J.B.P.A. Lamarck, 1799 (PYRAMIDELLIDAE)
- Lonchidium, Genus Lonchidium D'Eichwald, 1860 † (TURMALITIDAE) (FOSSIL)
- lonchocera, Melibe lonchocera (E.C. Von Martens, 1879) - (TETHYDIDAE)
- Lonchoderma, Genus Lonchoderma L. Salvini-Plawén, 1992 (PROCHAETODERMATIDAE)
- lonchostoma, Oxychona lonchostoma (K.T. Menke, 1828) - (BULIMULIDAE)
- Loncosilla, syn of: Genus Novaculina W.H. Benson, 1830 (PHARIDAE)
- lonemountainensis, Straparollus lonemountainensis Blodgett & Johnson, 1992 † - (EUOMPHALIDAE) (FOSSIL)
- longa, Fernandezia longa H.A. Pilsbry, 1911 - (ACHATINELLIDAE)
- longa, Lamellidea ogasawarana longa H.A. Pilsbry, 1915 - (ACHATINELLIDAE)
- longa, Amastra moesta longa E.R. Sykes, 1896 - (AMASTRIDAE)
- longa, Emmericia longa H.A. Pilsbry, 1909 - syn of: Emmericiella longa (H.A. Pilsbry, 1909) - (AMNICOLIDAE)
- longa, Neamnigenia longa (Betekhtina †) - (ARCHANODONTIDAE) (FOSSIL)
- longa, Boletzkya longa K. Bandel, Reitner & W. Stürmer, 1983 † - (BOLETZKYIDAE) (FOSSIL)
- longa, Abida longa A. Moquin-Tandon, 1856 - syn of: Abida cylindrica (A. Michaud, 1829) - (CHONDRINIDAE)
- longa, Circotheca longa C. Chen & al., 1981 † - (CIRCOTHECIDAE) (FOSSIL)
- longa, Clathurella longa J.C. Melvill & R. Standen, 1896 - syn of: Etrema trigonostomum (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- longa, Glyphostoma longa J.C. Melvill & R. Standen, 1896, 1897 - syn of: Etrema trigonostomum (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- longa, Emmericiella longa (H.A. Pilsbry, 1909) - (COCHLIOPIDAE)
- longa, Ctenodonta longa Ulrich, 1894 † - (CTENODONTIDAE) (FOSSIL)
- longa, Austrodoris longa Y.S. Minichev, 1972 - syn of: Doris kerguelenensis (L.S.R. Bergh, 1884) - (DORIDIDAE)
- longa, Scaldia longa Whidborne † - (EDMONDIIDAE) (FOSSIL)
- longa, Rimula longa H.A. Pilsbry, 1943 - syn of: Rimula frenulata (W.H. Dall, 1889) - (FISSURELLIDAE)
- longa, Gadila longa F. Da Silva, S. Pinto & M. Alves, 2010 - (GADILIDAE)
- longa, Tianzhushania longa Z.X. Qian & al., 1979 † - (HALKIERIIDAE) (FOSSIL)
- longa, Helicarion longa H.A. Pilsbry & Y. Hirase, 1905 - (HELICARIONIDAE)
- longa, Tusoteuthis longa Logan, 1898 † - (KELAENIDAE) (FOSSIL)
- longa, Platymyoidea longa (Buvignier, 1852 †) - (LATERNULIDAE) (FOSSIL)
- longa, Tresus longa W.H. Dall, 1921 - syn of: Tresus nuttallii (T.A. Conrad, 1837) - (MACTRIDAE)
- longa, Spisula longa W.H. Dall, 1921 - syn of: Tresus nuttallii (T.A. Conrad, 1837) - (MACTRIDAE)
- longa, Malletia longa Krishtofovich, 1954 † - (MALLETIIDAE) (FOSSIL)
- longa, Kurtziella longa G.W. Nowell-Usticke, 1969 - syn of: Kurtziella dorvilliae (L.A. Reeve, 1845) - (MANGELIIDAE)
- longa, Granulina longa R. La Perna, B.M. Landau & R. Marquet, 2001 † - (MARGINELLIDAE) (FOSSIL)
- longa, Microcolpia longa Gozhik in Gozhik & Datsenko, 2007 † - (MELANOPSIDAE) (FOSSIL)
- longa, Melanopsis longa G.P. Deshayes in A.E.J. Férussac, 1851 † - (MELANOPSIDAE) (FOSSIL)
- longa, Subcancilla longa (W.M. Gabb, 1873 †) - (MITRIDAE) (FOSSIL)
- longa, Taimyria longa Lutkevich, 1951 † - (MODIOMORPHIDAE) (FOSSIL)
- longa, Gervillia longa H.B. Geinitz, 1867 † - (MYALINIDAE) (FOSSIL)
- longa, Acila longa Kalishevich, 1969 † - (NUCULIDAE) (FOSSIL)
- longa, Dorymenia longa (H.F. Nierstrasz, 1902) - (PRONEOMENIIDAE)
- longa, Purpuroidea longa Pcelintsev, 1927 † - (PURPUROIDEIDAE) (FOSSIL)
- longa, Lycettitrigonia longa (A.E.R. Agassiz, 1840 †) - (RUTITRIGONIIDAE) (FOSSIL)
- longa, Finella reticulata longa K. Oyama, 1954 - (SCALIOLIDAE)
- longa, Shaanxiconcha longa (Hua, 1965 †) - (SHAANXICONCHIDAE) (FOSSIL)
- longa, Angulus longa W.M. Gabb, 1864 † - (TELLINIDAE) (FOSSIL)
- longa, Thracia longa Lutkevitch & Lobanova, 1960 † - syn of: Myomedia carinata (Morris, 1845 †) - (THRACIIDAE) (FOSSIL)
- longa, Trigonia longa A.E.R. Agassiz, 1840 † - syn of: Lycettitrigonia longa (A.E.R. Agassiz, 1840 †) - (TRIGONIIDAE) (FOSSIL)
- longa, Torrecoptis longa (H.A. Pilsbry & J. Henderson, 1913) - (UROCOPTIDAE)
- longa, Pachymyonia longa Astafieva-Urbaitis, 1976 † - syn of: Myomedia carinata (Morris, 1845 †) - (VACUNELLIDAE) (FOSSIL)
- longa, Vesicomya longa K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Calyptogena valdiviae (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (VESICOMYIDAE)
- longa boucardi, Oxystyla longa boucardi L. Pfeiffer, 1860 - syn of: Orthalicus boucardi L. Pfeiffer, 1860 - (ORTHALICIDAE)
- longa elongata, Shaanxiconcha longa elongata (Hua, 1965 †) - (SHAANXICONCHIDAE) (FOSSIL)
- longa guitarti, Torrecoptis longa guitarti C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- longa mitzopoulosi, Canthidomus longa mitzopoulosi Papp, 1955 † - syn of: Holandriana gaji (Š. Brusina, 1878 †) - (MELANOPSIDAE) (FOSSIL)
- longa strebeli, Oxystyla longa strebeli H.A. Pilsbry, 1899 - syn of: Orthalicus boucardi L. Pfeiffer, 1860 - (ORTHALICIDAE)
- longae, Pyrgulopsis longae R. Hershler, 1995 - (HYDROBIIDAE)
- Longaeva, syn of: Genus Cochlicella A.E.J. Férussac in A. Risso, 1826 (COCHLICELLIDAE)
- longaeva, Hydrobia longaeva M. von Neumayr, 1875 † - (HYDROBIIDAE) (FOSSIL)
- Longaeviceras, Genus Longaeviceras Buckman, 1918 † (CADOCERATIDAE) (FOSSIL)
- Longaevicerithium, Genus Longaevicerithium Guzhov, 2003 † (NEWTONIELLIDAE) (FOSSIL)
- longaevum, Longaeviceras longaevum (W.I. Bean, 1913 †) - (CADOCERATIDAE) (FOSSIL)
- longaevus, Bulimulus longaevus C.M.F. Ancey, 1881 † - syn of: Tocobaga floridanus (T.A. Conrad, 1846 †) - (BULIMULIDAE) (FOSSIL)
- longalvum, Docidoceras longalvum Vacek, 1886 † - (OTOITIDAE) (FOSSIL)
- longanensis, Chicoreus longanensis Martin, 1895 † - (MURICIDAE) (FOSSIL)
- longarae, Oecotraustes longarae Sturani, 1973 † - (OPPELIIDAE) (FOSSIL)
- longata, Melanopsis senatoria longata Handmann, 1887 † - (MELANOPSIDAE) (FOSSIL)
- longata, Scabies longata Y.Y. Liu, Y.H. Duan & K.Y. Lai, 1991 - (UNIONIDAE)
- longatolineatus, Theodoxus eugenii longatolineatus Papp, 1953 † - (NERITIDAE) (FOSSIL)
- longatum, Lunanoceras longatum C. Chen & Z. Qi, 1979 † - (PLECTRONOCERATIDAE) (FOSSIL)
- longauriculus, Hunanopecten longauriculus Yin, 1983 † - (HUNANOPECTINIDAE) (FOSSIL)
- longbottomi, Pseudovertagus longbottomi Darragh, 2017 † - (CERITHIIDAE) (FOSSIL)
- longbottomi, Splendrillia longbottomi F.E. Wells, 1990 - (DRILLIIDAE)
- Longchaeus, Subgenus Pyramidella (Longchaeus) O.A.L. Mörch, 1875 (PYRAMIDELLIDAE)
- longeare, Deltopecten longeare Liang, 1980 † - (DELTOPECTINIDAE) (FOSSIL)
- longequadrata, Shaanxiconcha longequadrata Ding & Li, 1982 † - (SHAANXICONCHIDAE) (FOSSIL)
- longfordensis, Nerinea longfordensis Hudleston † - (NERINEIDAE) (FOSSIL)
- longi, Parasyngenochilus longi P.A. Maxwell, 1992 † - (CONOIDEA (UNASSIGNED)) (FOSSIL)
- longi, Cuthona longi D.W. Behrens, 1985 - (FIONIDAE)
- longiaperturata, Syrnola longiaperturata S. Nomura, 1938 - (PYRAMIDELLIDAE)
- longiaxis, Pteria longiaxis (Buckman) † - (PTERIIDAE) (FOSSIL)
- Longibelus, Genus Longibelus Fuchs & al., 2013 † (GROENLANDIBELIDAE) (FOSSIL)
- longibrachus, Muusoctopus longibrachus (C.M. Ibáñez, E.G. Sepulveda & J. Chong, 2006) - (ENTEROCTOPODIDAE)
- longibrachus akambei, Muusoctopus longibrachus akambei I.G. Gleadall, G. Guerrero, F.G. Hochberg & V.V. Laptikhovsky, 2010 - (ENTEROCTOPODIDAE)
- longibranchiae, Leptochiton longibranchiae B.I. Sirenko, 2015 - (LEPTOCHITONIDAE)
- longibranchus, Cerberilla longibranchus (N.I. Volodchenko, 1941) - (AEOLIDIIDAE)
- longibranchus, Paracerberilla longibranchus N.I. Volodchenko, 1941 - syn of: Cerberilla longibranchus (N.I. Volodchenko, 1941) - (AEOLIDIIDAE)
- longibursa, Cratena longibursa L.S.R. Bergh, 1870 - (FACELINIDAE)
- longicallis, Erycina longicallis R.A. Philippi, 1844 - syn of: Abra longicallus (A. Scacchi, 1835) - (LASAEIDAE)
- longicallis, Abra longicallis A. Scacchi, 1835 - syn of: Abra longicallus (A. Scacchi, 1835) - (SEMELIDAE)
- longicallis americana, Abra longicallis americana A.E. Verrill & K.J. Bush, 1898 - syn of: Abra longicallus (A. Scacchi, 1835) - (SEMELIDAE)
- longicallus, Abra longicallus (A. Scacchi, 1835) - (SEMELIDAE)
- longicallus, Tellina longicallus A. Scacchi, 1835 - syn of: Abra longicallus (A. Scacchi, 1835) - (TELLINIDAE)
- longicallus americana, Abra longicallus americana A.E. Verrill & K.J. Bush, 1898 - (SEMELIDAE)
- longicameratum, Infundibuloceras longicameratum Kröger, 2008 † - (ORTHOCERATIDAE) (FOSSIL)
- longicameratum, Protocyptendoceras longicameratum Kröger & B. Lefebvre, 2012 † - (PROTEROCAMEROCERATIDAE) (FOSSIL)
- longicameratum, Stereoplasmoceras longicameratum Sweet, 1958 † - (STEREOPLASMOCERATIDAE) (FOSSIL)
- longicardinalis, Myalina longicardinalis Snider, 1915 † - (MYALINIDAE) (FOSSIL)
- longicauda, Stylocheilus longicauda (J.R.C. Quoy & J.P. Gaimard, 1825) - (APLYSIIDAE)
- longicauda, Armina longicauda G.Y. Lin, 1981 - (ARMINIDAE)
- longicauda, Colus longicauda J.B.P.A. Lamarck, 1816 - syn of: Fusinus colus longicauda J.B.P.A. Lamarck, 1816 - (BUCCINIDAE)
- longicauda, Exiligada longicauda F. Criscione, A. Law & F. Köhler, 2012 - (CAMAENIDAE)
- longicauda, Cancellaria longicauda H. Strebel, 1908 - syn of: Paradmete curta (H. Strebel, 1908) - (CANCELLARIIDAE)
- longicauda, Anachis longicauda A.E.M. Cossmann, 1901 - syn of: Columbella rustica (C. Linnaeus, 1758) - (COLUMBELLIDAE)
- longicauda, Fusinus colus longicauda J.B.P.A. Lamarck, 1816 - (FASCIOLARIIDAE)
- longicauda, Ficus longicauda (J.P.S. Grateloup, 1840 †) - (FICIDAE) (FOSSIL)
- longicauda, Fiona longicauda J.F. Heincke, 1897 - syn of: Fiona pinnata (J.F. von Eschscholtz, 1831) - (FIONIDAE)
- longicauda, Fiona longicauda J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Fiona pinnata (J.F. von Eschscholtz, 1831) - (FIONIDAE)
- longicauda, Hirtomurex longicauda F. Settepassi, 1971 - syn of: Babelomurex tectumsinensis (G.P. Deshayes, 1856) - (MURICIDAE)
- longicauda, Eopleurotoma longicauda P. Brebion, 1992 † - (TURRIDAE) (FOSSIL)
- longicauda, Paradmete longicauda H. Strebel, 1908 - syn of: Paradmete curta (H. Strebel, 1908) - (VOLUTOMITRIDAE)
- longicauda striatus, Stylocheilus longicauda striatus J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Stylocheilus striatus (J.R.C. Quoy & J.P. Gaimard, 1832) - (APLYSIIDAE)
- longicaudata, Anisocardia longicaudata L.R. Cox, 1947 † - (ARCTICIDAE) (FOSSIL)
- longicaudata, Colus curtus longicaudata F.W. Harmer † - (BUCCINIDAE) (FOSSIL)
- longicaudata, Rhinoclavis longicaudata (A. Adams & L.A. Reeve, 1850) - (CERITHIIDAE)
- longicaudata, Longicerithium longicaudata C. Beets, 1942 - syn of: Rhinoclavis longicaudata (A. Adams & L.A. Reeve, 1850) - (CERITHIIDAE)
- longicaudata, Clio longicaudata L.F.A. Souleyet, 1852 - syn of: Paraclione longicaudata (L.F.A. Souleyet, 1852) - (CLIIDAE)
- longicaudata, Paraclione longicaudata (L.F.A. Souleyet, 1852) - (CLIONIDAE)
- longicaudata, Flabellina longicaudata (O'Donoghue, 1922) - (FLABELLINIDAE)
- longicaudata, Propeleda longicaudata (K.H.J. Thiele, 1912) - (NUCULANIDAE)
- longicaudatum, Gyrineum longicaudatum A.G. Beu, 1998 - (RANELLIDAE)
- longicaudum, Haustellum longicaudum (F.C. Baker, 1891) - (MURICIDAE)
- longicaudus, Fusinus longicaudus J.B.P.A. Lamarck, 1816 - syn of: Fusinus colus longicauda J.B.P.A. Lamarck, 1816 - (FASCIOLARIIDAE)
- longicaulis, Mendana longicaulis H.B. Baker, 1938 - (EUCONULIDAE)
- longicella, Epophioceras longicella F.A. von Quenstedt, 1885 † - (ARIETITIDAE) (FOSSIL)
- longicellus, Arietites longicellus (F.A. von Quenstedt, 1858 †) - (ARIETITIDAE) (FOSSIL)
- longicerata, Tergiposacca longicerata Cella, Carmona, Ekimova, Chichvarkhin, Schepetov & Gosliner, 2016 - (FIONIDAE)
- Longicerithium, Subgenus Rhinoclavis (Longicerithium) R.S. Houbrick, 1978 † (CERITHIIDAE) (FOSSIL)
- longicirrata, Massya longicirrata (A.L. Massy, 1917) - (CLIONIDAE)
- longicirrata, Cliopsis longicirrata A.L. Massy, 1917 - syn of: Massya longicirrata (A.L. Massy, 1917) - (CLIOPSIDAE)
- longicirrha, Cerberilla longicirrha L.S.R. Bergh, 1873 - (AEOLIDIIDAE)
- longicirrha, Pruvotfolia longicirrha (C.N.E. Eliot, 1906) - (FACELINIDAE)
- longicirrhus, Glaucus longicirrhus O.W.H. Reinhardt & L.S.R. Bergh, 1864 - syn of: Glaucus atlanticus F. Forster, 1777 - (GLAUCIDAE)
- longicirrum, Phyllodesmium longicirrum (L.S.R. Bergh, 1905) - (FACELINIDAE)
- longicirrus, Glaucus longicirrus O.W.H. Reinhardt, L.S.R. Bergh, 1861, 1860 - syn of: Glaucus atlanticus F. Forster, 1777 - (GLAUCIDAE)
- longicolle, Buccinulum longicolle Powell, 1929 † - (BUCCINIDAE) (FOSSIL)
- longicollis, Tropidauchenia ootanii longicollis H. Nordsieck, 2011 - (CLAUSILIIDAE)
- longicollis, Lytopelte longicollis O. Böttger, 1886 - (LIMACIDAE)
- longicollis, Amalia longicollis O. Böttger, 1886 - syn of: Lytopelte maculata (F.C.L. Koch & D.F. Heynemann in E.C. Von Martens, 1874) - (MILACIDAE)
- longicollis, Notobranchaea longicollis (K.E.H. Bonnevie, 1913) - (NOTOBRANCHAEIDAE)
- longicollis, Adamsiella longicollis L. Pfeiffer, 1855 - (POMATIIDAE)
- longicollum, Ectenolites longicollum B.Z. Li, 1984 † - (ELLESMEROCERATIDAE) (FOSSIL)
- longicolum, Huaiheceras longicolum Zou & C. Chen, 1979 † - (ELLESMEROCERIDA (UNASSIGNED)) (FOSSIL)
- Longiconcha, Genus Longiconcha Wade, 1926 † (VOLUTIDAE) (FOSSIL)
- longiconica, Circotheca longiconica Z.X. Qian, 1978 † - syn of: Conotheca subcurvata Yü, 1974 † - (CIRCOTHECIDAE) (FOSSIL)
- longiconica, Ectenolites longiconica B.Z. Li, 1984 † - (ELLESMEROCERATIDAE) (FOSSIL)
- longiconus, Belemnites longiconus Schwegler, 1969 † - syn of: Acrocoelites riegrafi Doyle, 1992 † - (BELEMNITELLIDAE) (FOSSIL)
- longicordatum, Rhinoclavis longicordatum A. Adams & L.A. Reeve, 1850 - syn of: Rhinoclavis longicaudata (A. Adams & L.A. Reeve, 1850) - (CERITHIIDAE)
- longicornis, Toxoceras longicornis Pictet & De Loriol, 1858 † - syn of: Leptoceratoides longicornis (Pictet & De Loriol, 1858 †) - (ANCYLOCERATIDAE) (FOSSIL)
- longicornis, Aplysia longicornis P.C.A.S.L. Rang, 1828 - syn of: Aplysia punctata (G.L.C.F.D. Cuvier, 1803) - (APLYSIIDAE)
- longicornis, Gabbia longicornis (W.H. Benson) - (BITHYNIIDAE)
- longicornis, Doris longicornis G. Montagu, 1808 - syn of: Facelina auriculata (O.F. Müller, 1776) - (DORIDIDAE)
- longicornis, Facelina longicornis G. Montagu, 1808 - syn of: Facelina auriculata (O.F. Müller, 1776) - (FACELINIDAE)
- longicornis, Myja longicornis L.S.R. Bergh, 1896 - (FIONIDAE)
- longicornis, Leptoceratoides longicornis (Pictet & De Loriol, 1858 †) - (LEPTOCERATOIDIDAE) (FOSSIL)
- longicornis, Typhisala longicornis (W.H. Dall, 1888) - (MURICIDAE)
- longicornis, Chicoreus longicornis (R.W. Dunker, 1864) - (MURICIDAE)
- longicornis, Siphonochelus longicornis W.H. Dall in A.E.R. Agassiz, 1888 - (MURICIDAE)
- longicornis, Murex longicornis R.W. Dunker, 1864 - syn of: Chicoreus longicornis (R.W. Dunker, 1864) - (MURICIDAE)
- longicornis, Typhis longicornis Auct. non W.H. Dall, 1888 - syn of: Siphonochelus riosi (H.W. Bertsch & D'Attilio, 1980) - (MURICIDAE)
- longicornis, Limacia longicornis L.S.R. Bergh, 1905 - (POLYCERIDAE)
- longicosta, Scutellastra longicosta (J.B.P.A. Lamarck, 1819) - (PATELLIDAE)
- longicosta, Patella longicosta J.B.P.A. Lamarck, 1819 - syn of: Scutellastra longicosta (J.B.P.A. Lamarck, 1819) - (PATELLIDAE)
- longicosta, Patella longicosta W.H. Turton, 1932 - syn of: Scutellastra longicosta (J.B.P.A. Lamarck, 1819) - (PATELLIDAE)
- longicostata, Palmoxytoma longicostata (Stutchbury 1839) † - (OXYTOMIDAE) (FOSSIL)
- longicostata, Cryptogemma longicostata A.V. Sysoev & Y.I. Kantor, 1986 - (TURRIDAE)
- longicostatum, Turkmeniceras turkmenicum longicostatum Tovbina, 1962 † - (DESHAYESITIDAE) (FOSSIL)
- longicostatus, Colchidites longicostatus Kakabadze, 1971 † - (ANCYLOCERATIDAE) (FOSSIL)
- longicostatus, Angyomphalus longicostatus H. Guo, 1983 † - (GOSSELETINIDAE) (FOSSIL)
- longicymba, Chiton longicymba H.M.D. de Blainville, 1825 - syn of: Stenochiton longicymba (H.M.D. de Blainville, 1825 ex Dufresne MS) - (CHITONIDAE)
- longicymba, Stenochiton longicymba (H.M.D. de Blainville, 1825 ex Dufresne MS) - (ISCHNOCHITONIDAE)
- longicymba juloides, Stenochiton longicymba juloides (A. Adams & G.F. Angas, 1864) - (ISCHNOCHITONIDAE)
- Longidaonella, Genus Longidaonella Farsan, 1972 † (PTERIIDA (UNASSIGNED)) (FOSSIL)
- longidens, Cerion longidens H.A. Pilsbry, 1902 - (CERIONIDAE)
- Longidens, syn of: Subgenus Cerion (Strophiops) W.H. Dall, 1894 (CERIONIDAE)
- longidens, Yunnanopleura longidens Yu, 1987 † - syn of: Yunnanopleura biformis Yu, 1987 † - (MAIKHANELLIDAE) (FOSSIL)
- longidens, Odontolkites longidens F.A. von Quenstedt † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- longidens, Garantiana longidens (F.A. von Quenstedt †) - (PARKINSONIIDAE) (FOSSIL)
- longidentata, Propustularia longidentata B.M. Landau & Groves, 2011 † - (CYPRAEIDAE) (FOSSIL)
- longidentata, Erycina longidentata G.P. Deshayes, 1858 † - (LASAEIDAE) (FOSSIL)
- longidentata, Abra longidentata M. Huber, 2015 - (SEMELIDAE)
- longidentatus, Janolus longidentatus T.M. Gosliner, 1981 - (PROCTONOTIDAE)
- longidoides, Paragarantiana longidoides (Gauthier, Trévisan & Joron, 2000 †) - (PARKINSONIIDAE) (FOSSIL)
- longidomum, Avaoceras longidomum Ulrich & al., 1944 † - (BASSLEROCERATIDAE) (FOSSIL)
- longidomum, Graciloceras longidomum Flower, 1943 † - (GRACILOCERATIDAE) (FOSSIL)
- longidomus, Carotites longidomus P.A. Zhuravleva, 1972 † - syn of: Carotites procerus P.A. Zhuravleva, 1972 † - (DISCOSORIDA (unassigned)) (FOSSIL)
- longifiliare, Buccinum longifiliare R. Tiba, 1983 - (BUCCINIDAE)
- longifilis, Cavolinia longifilis F.H. Troschel, 1854 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- longifilis, Thylacodes longifilis O.A.L. Mörch, 1862 - (VERMETIDAE)
- longifissa, Puncturella longifissa W.H. Dall, 1914 - (FISSURELLIDAE)
- longifissa, Fissurella longifissa G.B. II Sowerby, 1862 - (FISSURELLIDAE)
- longiflagellata, Theba longiflagellata A.A. Schileyko, 1968 - syn of: Monacha talischana (E.C. Von Martens, 1880) - (HELICIDAE)
- longifolium, Lopha longifolium Martin, 1922 † - (OSTREIDAE) (FOSSIL)
- longiforma, Turricula longiforma (T.H. Aldrich, 1885 †) - (CLAVATULIDAE) (FOSSIL)
- longiforma, Orthosurcula longiforma (T.H. Aldrich, 1897 †) - (COCHLESPIRIDAE) (FOSSIL)
- longiforma, Pleurotoma longiforma T.H. Aldrich, 1897 † - syn of: Orthosurcula longiforma (T.H. Aldrich, 1897 †) - (TURRIDAE) (FOSSIL)
- longiformis, Clavilithes longiformis D.T. Dockery, 1984 † - (FASCIOLARIIDAE) (FOSSIL)
- longiformis, Pseudohastites longiformis (C.H. Blake, 1876 †) - (PASSALOTEUTHIDIDAE) (FOSSIL)
- longiformis, Pyrunculus longiformis G.Y. Lin & Z. Qi, 1986 - (RETUSIDAE)
- longifossulum, Hemilepton longifossulum (A.E.M. Cossmann, 1896 †) - (LASAEIDAE) (FOSSIL)
- longifrons, Mactromeris merriami longifrons H. Turner, 1938 † - (MACTRIDAE) (FOSSIL)
- longifrons, Yoldia longifrons (T.A. Conrad, 1860 †) - (YOLDIIDAE) (FOSSIL)
- longiglans, Pyrgulopsis longiglans R. Hershler, 1998 - (HYDROBIIDAE)
- longii, Nerita longii C.A. Récluz, 1842 - (NERITIDAE)
- longilineus, Africonus longilineus (D. Röckel, E. Rolán & A. Monteiro, 1980) - (CONIDAE)
- longilobata, Ussuria longilobata Chao, 1959 † - syn of: Ussuria kwangsiana Chao, 1959 † - (USSURIIDAE) (FOSSIL)
- longilobatum, Planodiscoceras longilobatum J.K. Zhao & al., 1978 † - (ANDERSSONOCERATIDAE) (FOSSIL)
- longilobatum, Anfuceras longilobatum J.K. Zhao & al., 1978 † - (ARAXOCERATIDAE) (FOSSIL)
- longilobatum, Lijiangoceras longilobatum Liang, 1983 † - (ARAXOCERATIDAE) (FOSSIL)
- longilobatum, Prototoceras longilobatum J.K. Zhao & al., 1978 † - (ARAXOCERATIDAE) (FOSSIL)
- longilobatum, Siphonodentalium longilobatum (M. Boissevain, 1906) - (GADILIDAE)
- longilobatum, Pseudosageceras longilobatum Kiparisova, 1954 † - (HEDENSTROEMIIDAE) (FOSSIL)
- longilobatum, Rotodiscoceras longilobatum J.K. Zhao & al., 1978 † - (PLEURONODOCERATIDAE) (FOSSIL)
- longilobatum, Sporadoceras longilobatum Petter, 1959 † - (SPORADOCERATIDAE) (FOSSIL)
- longilobatum, Prostacheoceras longilobatum Liang, 1982 † - (VIDRIOCERATIDAE) (FOSSIL)
- longilobum, Cheiloceras longilobum Sobolew, 1914 † - (CHEILOCERATIDAE) (FOSSIL)
- longilobum, Zhonglupuceras longilobum W.C. Zhou, 1985 † - (PSEUDOHALORITIDAE) (FOSSIL)
- longilunata, Dosinia longilunata L.A. Reeve, 1850 - syn of: Dosinia angulosa (R.A. Philippi, 1847) - (VENERIDAE)
- Longimactra, Genus Longimactra Finlay, 1928 † (MACTRIDAE) (FOSSIL)
- Longimactra, syn of: Genus Oxyperas O.A.L. Mörch, 1853 (MACTRIDAE)
- longimana, Kondakovia longimana Y.A. Filippova, 1972 - (ONYCHOTEUTHIDAE)
- longimanus, Architeuthis longimanus T.W. Kirk, 1888 - syn of: Architeuthis dux J.J.S. Steenstrup, 1857 - (ARCHITEUTHIDAE)
- Longinella, syn of: Genus Dentimargo A.E.M. Cossmann, 1899 (MARGINELLIDAE)
- longini, Cardita longini J.Q. Burch, 1944 - syn of: Cyclocardia bailyi (J.Q. Burch, 1944) - (CARDITIDAE)
- longini, Cyclocardia longini J.L.Jr. Baily, 1945 - syn of: Cyclocardia bailyi (J.Q. Burch, 1944) - (CARDITIDAE)
- longini, Cardita longini J.L.Jr. Baily, 1945 - syn of: Cyclocardia bailyi (J.Q. Burch, 1944) - (CARDITIDAE)
- longini, Chondrina longini P. Fagot, 1906 - syn of: Chondrina ascendens C.A. Westerlund, 1878 - (CHONDRINIDAE)
- longinosanum, Epitonium longinosanum H. DuShane, 1970 - syn of: Epitonium apiculatum (W.H. Dall, 1889) - (EPITONIIDAE)
- longinqua, Amnicola longinqua A.A. Gould, 1855 - syn of: Pyrgulopsis longinqua (A.A. Gould, 1855) - (AMNICOLIDAE)
- longinqua, Schilderia achatidea longinqua F.A. Schilder & M. Schilder, 1938 - (CYPRAEIDAE)
- longinqua, Levantina longinqua (H. Schütt & P. Subai, 1996) - (HELICIDAE)
- longinqua, Pyrgulopsis longinqua (A.A. Gould, 1855) - (HYDROBIIDAE)
- longinqua, Myalina longinqua F.S. Xu, 1980 † - syn of: Myalina semiglobosa Isberg, 1934 † - (MYALINIDAE) (FOSSIL)
- longinqua, Simulamerelina longinqua (H.A. Rehder, 1980) - (RISSOIDAE)
- longinqua, Merelina longinqua H.A. Rehder, 1980 - syn of: Simulamerelina longinqua (H.A. Rehder, 1980) - (RISSOIDAE)
- longinqua, Manzonia longinqua H.A. Rehder, 1980 - syn of: Simulamerelina longinqua (H.A. Rehder, 1980) - (RISSOIDAE)
- longinqua, Finella longinqua (F. Haas, 1949) - (SCALIOLIDAE)
- longinquus, Bostryx longinquus P.M.A. Morelet, 1863 - (BULIMULIDAE)
- longior, Partulina terebra longior H.A. Pilsbry & C.M. Cooke, 1912 - (ACHATINELLIDAE)
- longior, Crassatella longior H.F.A. von Ihering, 1897 † - (CRASSATELLIDAE) (FOSSIL)
- longior, Erronea caurica longior T. Iredale, 1935 - (CYPRAEIDAE)
- longior, Glycymeris longior Sowerby, 1832 - (GLYCYMERIDIDAE)
- longior, Cyrtodaria longior (G.B. I Sowerby, 1832) - (HIATELLIDAE)
- longior, Anastrophina longior (J. Perner, 1907 †) - (HOLOPEIDAE) (FOSSIL)
- longior, Staurospira longior J. Perner, 1907 † - syn of: Anastrophina longior (J. Perner, 1907 †) - (HOLOPEIDAE) (FOSSIL)
- longior, Hibolithes longior Shvetsov, 1913 † - (MESOHIBOLITHIDAE) (FOSSIL)
- longior, Trophon longior J.C. Verco, 1909 - syn of: Litozamia rudolphi (J.W. Brazier, 1894) - (MURICIDAE)
- longior, Eupleura sulcidentata longior E.J. Petuch, 1994 - (MURICIDAE)
- longior, Euvaricella biplicatula longior (H.A. Pilsbry, 1909) - (OLEACINIDAE)
- longior, Pilorcula trifilaris longior B. Hausdorf, 1996 - (ORCULIDAE)
- longior, Volutaxis longior (H.A. Pilsbry, 1920) - (SPIRAXIDAE)
- longior, Subulites longior J. Perner, 1903 † - (SUBULITIDAE) (FOSSIL)
- longioriformis, Glycymeris longioriformis del Rio, 1992 † - (GLYCYMERIDIDAE) (FOSSIL)
- longipapillata, Cuthona georgiana longipapillata Y.S. Minichev, 1972 - (FIONIDAE)
- longipennis, Conocardium longipennis (J. Brown, 1843 †) - (CONOCARDIIDAE) (FOSSIL)
- longipennis, Hippocardia longipennis J. Brown, 1843 † - (HIPPOCARDIIDAE) (FOSSIL)
- longipersa, Orthosurcula longipersa (G.F. Harris, 1896 †) - (COCHLESPIRIDAE) (FOSSIL)
- longipersa, Pleurotoma longipersa G.F. Harris, 1896 † - syn of: Orthosurcula longipersa (G.F. Harris, 1896 †) - (TURRIDAE) (FOSSIL)
- longipersa tobar, Orthosurcula longipersa tobar Gardner, 1935 † - (COCHLESPIRIDAE) (FOSSIL)
- longipes, Cardium longipes O.A. Grimm, 1877 - syn of: Didacna baeri (O.A. Grimm, 1877) - (CARDIIDAE)
- longipes, Bornia longipes W. Stimpson, 1855 - syn of: Ceratobornia longipes (W. Stimpson, 1855) - (KELLIIDAE)
- longipes, Ceratobornia longipes (W. Stimpson, 1855) - (LASAEIDAE)
- longipes, Lepton longipes W. Stimpson, 1855 - syn of: Ceratobornia longipes (W. Stimpson, 1855) - (LASAEIDAE)
- longipes, Polypus longipes W.E. Leach, 1817 - (OCTOPODIDAE)
- longipes, Sepia longipes M. Sasaki, 1914 - (SEPIIDAE)
- longipes, Onchidiopsis longipes K.M. Derjugin, 1937 - (VELUTINIDAE)
- Longiphallus, Subgenus Oxychilus (Longiphallus) F. Riedel, 1958 (OXYCHILIDAE)
- Longiphalus, syn of: Subgenus Oxychilus (Longiphallus) F. Riedel, 1958 (OXYCHILIDAE)
- longipilosa, Limopsis longipilosa J.P.L. Pelseneer, 1903 - (LIMOPSIDAE)
- longipilus, Cyclotus longipilus E.C. Von Martens, 1865 - (CYCLOPHORIDAE)
- longiplica, Gudeodiscus longiplica B. Páll-Gergely & T. Asami, 2016 - (PLECTOPYLIDAE)
- longiplicata, Hemizaptyx longiplicata H. Nordsieck, 2005 - (CLAUSILIIDAE)
- longiplicata, Pulchraptyx longiplicata (H.A. Pilsbry, 1908) - (CLAUSILIIDAE)
- longiptera, Octopoteuthis longiptera (I.I. Akimushkin, 1963) - (OCTOPOTEUTHIDAE)
- longiptera, Hebetancylus longiptera I.I. Akimushkin, 1963 - (PLANORBIDAE)
- longipulchrum, Suloceras longipulchrum Kröger, 2008 † - (SPYROCERATIDAE) (FOSSIL)
- longiqua, Simulamerelina longiqua H.A. Rehder, 1980 - syn of: Simulamerelina longinqua (H.A. Rehder, 1980) - (RISSOIDAE)
- longiquum, Hecatoceras longiquum Teichert & Glenister, 1952 † - (WESTONOCERATIDAE) (FOSSIL)
- longirhombus, Plagiostropha longirhombus M. Chino, 2009 - (DRILLIIDAE)
- longiroster, Fusinus longiroster (G.B. Brocchi, 1814 †) - (FASCIOLARIIDAE) (FOSSIL)
- longirostra, Astarte longirostra D'Orbigny, 1842 - (ASTARTIDAE)
- longirostra, Hyalaea longirostra D'Orbigny, 1836 - syn of: Diacavolinia longirostris (H.M.D. de Blainville, 1821) - (CAVOLINIIDAE)
- longirostra, Cavolina longirostra J.E. Gray, 1850 - syn of: Diacavolinia longirostris (H.M.D. de Blainville, 1821) - (CAVOLINIIDAE)
- longirostra, Caestocorbula longirostra (G.P. Deshayes †) - (CORBULIDAE) (FOSSIL)
- longirostra, Ranularia longirostra H.C.F. Schumacher, 1817 - syn of: Ranularia gutturnia (P.F. Röding, 1798) - (RANELLIDAE)
- longirostra, Varicospira longirostra (A. Pannekoek, 1936 †) - (ROSTELLARIIDAE) (FOSSIL)
- longirostrata, Comitileda longirostrata (P.A. Maxwell, 1969 †) - (NUCULANIDAE) (FOSSIL)
- longirostrata, Calcarovula longirostrata (G.B. I Sowerby, 1828) - (OVULIDAE)
- longirostrata, Phenacovolva longirostrata (G.B. II Sowerby, 1829) - syn of: Phenacovolva recurva (G.B. II Sowerby in A. Adams & L.A. Reeve, 1848) - (OVULIDAE)
- longirostrata, Volva longirostrata G.B. II Sowerby, 1829 - syn of: Phenacovolva recurva (G.B. II Sowerby in A. Adams & L.A. Reeve, 1848) - (OVULIDAE)
- longirostratum, Ovula longirostratum G.B. I Sowerby, 1828 - syn of: Calcarovula longirostrata (G.B. I Sowerby, 1828) - (OVULIDAE)
- longirostris, Astarte longirostris D'Orbigny, 1842 - syn of: Astarte longirostra D'Orbigny, 1842 - (ASTARTIDAE)
- longirostris, Protoaulacoceras longirostris K. Bandel, Reitner & W. Stürmer, 1983 † - (AULACOCERIDA (UNASSIGNED)) (FOSSIL)
- longirostris, Penion longirostris (R. Tate, 1888 †) - (BUCCINIDAE) (FOSSIL)
- longirostris, Siphonalia longirostris R.W. Dunker, 1882 - (BUCCINIDAE)
- longirostris, Diacavolinia longirostris (H.M.D. de Blainville, 1821) - (CAVOLINIIDAE)
- longirostris, Cavolinia longirostris C.A. Lesueur in H.M.D. de Blainville, 1821 - syn of: Diacavolinia longirostris (H.M.D. de Blainville, 1821) - (CAVOLINIIDAE)
- longirostris, Cavolina longirostris A. Adams, 1853 - syn of: Diacavolinia longirostris (H.M.D. de Blainville, 1821) - (CAVOLINIIDAE)
- longirostris, Turricula striatula longirostris (J.P.S. Grateloup, 1832 †) - (CLAVATULIDAE) (FOSSIL)
- longirostris, Tosapusia longirostris A.E. Fedosov, M. Herrmann & P. Bouchet, 2017 - (COSTELLARIIDAE)
- longirostris, Cuspidaria longirostris J.B.P.A. Lamarck, 1818 - syn of: Cuspidaria rostrata (L. Spengler, 1793) - (CUSPIDARIIDAE)
- longirostris, Microfulgur longirostris (P. Marshall, 1917 †) - (FASCIOLARIIDAE) (FOSSIL)
- longirostris, Fusus longirostris H.C.F. Schumacher, 1817 - syn of: Fusinus colus (C. Linnaeus, 1758) - (FASCIOLARIIDAE)
- longirostris, Anatina longirostris J.B.P.A. Lamarck, 1818 - syn of: Cuspidaria rostrata (L. Spengler, 1793) - (MACTRIDAE)
- longirostris, Melanopsis longirostris P.M. Pallary, 1920 † - (MELANOPSIDAE) (FOSSIL)
- longirostris, Ostrea longirostris J.B.P.A. Lamarck, 1806 † - syn of: Ostrea roncana P. Partsch, 1870 † - (OSTREIDAE) (FOSSIL)
- longirostris, Unio longirostris E.A. Rossmässler, 1836 - syn of: Unio pictorum rostratus J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- longirostris, Anodonta longirostris H. Drouët, 1883 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- longirostris angulata, Diacavolinia longirostris angulata L.F.A. Souleyet, 1852 - syn of: Diacavolinia angulata (L.F.A. Souleyet, 1852) - (CAVOLINIIDAE)
- longirostris flexipes, Diacavolinia longirostris flexipes S. Van Der Spoel, P. Bleeker & H. Kobayasi, 1993 - syn of: Diacavolinia flexipes S. Van Der Spoel, P. Bleeker & H. Kobayasi, 1993 - (CAVOLINIIDAE)
- longirostris limbata, Cavolinia longirostris limbata D'Orbigny, 1836 - syn of: Diacavolinia limbata (A.V.M.D. D'Orbigny, 1836) - (CAVOLINIIDAE)
- longirostropsis, Pleurofusia longirostropsis (A. De Gregorio, 1890 †) - (TURRIDAE) (FOSSIL)
- longirostropsis, Pleurotoma longirostropsis A. De Gregorio, 1890 † - syn of: Pleurofusia longirostropsis (A. De Gregorio, 1890 †) - (TURRIDAE) (FOSSIL)
- longirostrum, Antalis longirostrum (L.A. Reeve, 1843) - (DENTALIIDAE)
- Longiscala, syn of: Genus Subuliscala De Boury, 1909 (EPITONIIDAE)
- longiscata, Semisalsa longiscata (J.R. Bourguignat, 1856) - (COCHLIOPIDAE)
- longiscata, Schilderia longiscata (C. Mayer, 1875 †) - (CYPRAEIDAE) (FOSSIL)
- longiscata, Hydrobia longiscata J.R. Bourguignat, 1856 - syn of: Semisalsa longiscata (J.R. Bourguignat, 1856) - (HYDROBIIDAE)
- longiscata, Galba longiscata A. Brongniart, 1810 † - (LYMNAEIDAE) (FOSSIL)
- longiscata, Rostellaria longiscata Buvignier, 1852 † - (ROSTELLARIIDAE) (FOSSIL)
- longiscata, Oxyloma longiscata P.M.A. Morelet, 1841 - syn of: Oxyloma elegans (A. Risso, 1826) - (SUCCINEIDAE)
- longiscata, Terebra longiscata G.P. Deshayes, 1859 - syn of: Strioterebrum swainsoni (G.P. Deshayes, 1859) - (TEREBRIDAE)
- longiscula, Ribeirina longiscula (Billings, 1865 †) - (RIBEIRIIDAE) (FOSSIL)
- longiscula, Ribeiria longiscula Billings, 1865 † - syn of: Ribeirina longiscula (Billings, 1865 †) - (RIBEIRIIDAE) (FOSSIL)
- longisellatus, Pseudaspidites longisellatus Chao, 1959 † - syn of: Pseudaspidites muthianus (Krafft & Diener, 1909 †) - (PROPTYCHITIDAE) (FOSSIL)
- longiseptatum, Submeekoceras longiseptatum Chao, 1959 † - syn of: Submeekoceras hsuyuchieni (Chao, 1959 †) - (ARCTOCERATIDAE) (FOSSIL)
- longiseta, Rhinus longiseta (S. Moricand, 1846) - (SIMPULOPSIDAE)
- longisetosus, Americominella longisetosus (Z.J.A. De Castellanos & C. Fernández, 1972) - (BUCCINIDAE)
- longisetosus, Leptochiton longisetosus J.D. Sigwart & B.I. Sirenko, 2012 - (LEPTOCHITONIDAE)
- longisinuata, Macoma longisinuata T. Soot-Ryen, 1932 - syn of: Macoma calcarea (J.F. Gmelin, 1792) - (TELLINIDAE)
- longisinuatus, Tagelus longisinuatus H.A. Pilsbry & H.N. Lowe, 1932 - (SOLECURTIDAE)
- longisiphon, Abyssotrophon longisiphon R.V. Egorov, 1993 - syn of: Abyssotrophon soyoae (T.A. Okutani, 1959) - (MURICIDAE)
- longispadiceus, Octopus longispadiceus (M. Sasaki, 1917) - (OCTOPODIDAE)
- longisperatus, Conus longisperatus C.J. Maury, 1934 † - (CONIDAE) (FOSSIL)
- longispicum, Dideroceras longispicum I. Balashov, 1968 † - syn of: Proterovaginoceras incognitum (Schröder, 1882 †) - (ENDOCERATIDAE) (FOSSIL)
- longispina, Spinigera longispina (Eudes-Deslongchamps, 1842 †) - (APORRHAIDAE) (FOSSIL)
- longispina, Cavolinia longispina F.A. von Quenstedt, 1885 - syn of: Diacavolinia limbata (A.V.M.D. D'Orbigny, 1836) - (CAVOLINIIDAE)
- longispina, Paraformosana longispina (P.M. Heude, 1885) - (CLAUSILIIDAE)
- longispina, Pictetia longispina Uhlig, 1883 † - syn of: Acantholytoceras longispinum (Uhlig, 1883 †) - (LYTOCERATIDAE) (FOSSIL)
- longispina, Monopteria longispina (J.C. Cox, 1857 †) - (MONOPTERIIDAE) (FOSSIL)
- longispina, Theodoxus longispina C.A. Récluz - (NERITIDAE)
- longispina, Spiniloma longispina (Eudes-Deslongchamps, 1843 †) - (SPINILOMATIDAE) (FOSSIL)
- longispina, Spondylus longispina J.B.P.A. Lamarck, 1819 - syn of: Spondylus americanus Hermann, 1781 - (SPONDYLIDAE)
- longispina, Astraea longispina J.B.P.A. Lamarck, 1822 - syn of: Lithopoma phoebium (P.F. Röding, 1798) - (TURBINIDAE)
- longispina, Callista longispina O.A.L. Mörch, 1861 - syn of: Hysteroconcha multispinosus (Sowerby, 1851) - (VENERIDAE)
- longispinosa, Pruvotina longispinosa L. Salvini-Plawén, 1978 - (PRUVOTINIDAE)
- longispinosus, Callochiton longispinosus E.H.J. Leloup, 1952 - (CALLOCHITONIDAE)
- longispinosus, Babelomurex longispinosus (M. Suzuki, 1972) - (MURICIDAE)
- longispinum, Acantholytoceras longispinum (Uhlig, 1883 †) - (MACROSCAPHITIDAE) (FOSSIL)
- longispinus, Paradoxipecten longispinus Yin, 1983 † - (AVICULOPECTINIDAE) (FOSSIL)
- longispinus, Leptochiton longispinus H. Saito, 2001 - syn of: Leptochiton vietnamensis B.I. Sirenko, 1998 - (LEPTOCHITONIDAE)
- longispinus, Bolinus brandaris longispinus G.S. Coen, 1914 - (MURICIDAE)
- longispira, Micrancilla longispira (H. Strebel, 1908) - (ANCILLARIIDAE)
- longispira, Baryspira longispira H. Strebel, 1908 - syn of: Micrancilla longispira (H. Strebel, 1908) - (ANCILLARIIDAE)
- longispira, Ancilla longispira H. Strebel, 1908 - syn of: Micrancilla longispira (H. Strebel, 1908) - (ANCILLARIIDAE)
- longispira, Bostryx longispira W.K. Weyrauch, 1960 - (BULIMULIDAE)
- longispira, Mitrella longispira B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (COLUMBELLIDAE) (FOSSIL)
- longispira, Costellaria longispira G.B. Sowerby, 1874 - syn of: Vexillum radius (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- longispira, Cyrtoclymenia longispira W.K.C. Sun & S. Shen, 1965 † - (CYRTOCLYMENIIDAE) (FOSSIL)
- longispira, Drillia longispira E.A. Smith, 1879 - syn of: Leiocithara longispira (E.A. Smith, 1879) - (DRILLIIDAE)
- longispira, Clavilithes longispira Doncieux, 1908 † - (FASCIOLARIIDAE) (FOSSIL)
- longispira, Leiocithara longispira (E.A. Smith, 1879) - (MANGELIIDAE)
- longispira, Coelocaulus longispira (J.W. Hall, 1852 †) - (MURCHISONIIDAE) (FOSSIL)
- longispira, Arribazona longispira Mazaev, 2015 † - (MURCHISONIIDAE) (FOSSIL)
- longispira, Euvaricella longispira (C.B. Adams, 1850) - (OLEACINIDAE)
- longispira, Oliva longispira F.G. Bridgman, 1906 - syn of: Oliva oliva longispira F.G. Bridgman, 1906 - (OLIVIDAE)
- longispira, Oliva oliva longispira F.G. Bridgman, 1906 - (OLIVIDAE)
- longispira, Angiola longispira (E.A. Smith, 1872) - (PLANAXIDAE)
- longispira, Monoplex longispira A.G. Beu, 2010 † - (RANELLIDAE) (FOSSIL)
- longispira, Rissoella longispira (J.B.P.A. Lamarck, 1816) - (RISSOELLIDAE)
- longispira, Rissoina longispira W.J. Sleurs, 1991 - (RISSOINIDAE)
- longispira, Heterogen longispira (E.A. Smith, 1886) - (VIVIPARIDAE)
- longispirata, Cancellaria longispirata M. Yokoyama, 1926 † - (CANCELLARIIDAE) (FOSSIL)
- longispirata, Tornatina longispirata G. Yamakawa, 1911 - syn of: Retusa longispirata (G. Yamakawa, 1911) - (CYLICHNIDAE)
- longispirata, Retusa longispirata (G. Yamakawa, 1911) - (RETUSIDAE)
- longispirata, Decorifer longispirata G. Yamakawa, 1911 - syn of: Retusa longispirata (G. Yamakawa, 1911) - (RETUSIDAE)
- longispirum, Costellaria longispirum G.B. Sowerby, 1874 - syn of: Vexillum radius (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- longisquamosa, Pinctada longisquamosa (R.W. Dunker, 1852) - (PTERIIDAE)
- longisquamosa, Pteria longisquamosa R.W. Dunker, 1852 - syn of: Pinctada longisquamosa (R.W. Dunker, 1852) - (PTERIIDAE)
- longisquamosum, Lonchoderma longisquamosum (L. Salvini-Plawén, 1986) - (PROCHAETODERMATIDAE)
- longissima, Mitrella longissima D. Monsecour & D. Monsecour, 2007 - (COLUMBELLIDAE)
- longissima, Cucullaea longissima M. Yokoyama, 1925 - syn of: Calyptogena nipponica longissima (M. Yokoyama, 1925 †) - (CUCULLAEIDAE)
- longissima, Opalia longissima E.F. Garcia, 2004 - (EPITONIIDAE)
- longissima, Claviscala longissima G. Seguenza, 1879 - syn of: Claviscala richardi (P. Dautzenberg & M.E.A. de Boury, 1897) - (EPITONIIDAE)
- longissima, Stegocoelia longissima (Whidborne, 1896 †) - (GONIASMATIDAE) (FOSSIL)
- longissima, Helicarion longissima H.A. Pilsbry & Y. Hirase, 1909 - (HELICARIONIDAE)
- longissima, Panomya longissima M. Yokoyama, 1925 - (HIATELLIDAE)
- longissima, Aclisina longissima Whidborne, 1896 † - syn of: Stegocoelia longissima (Whidborne, 1896 †) - (MURCHISONIIDAE) (FOSSIL)
- longissima, Adipicola longissima (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (MYTILIDAE)
- longissima, Palaeanodonta longissima (Netschajew, 1894 †) - (PALAEANODONTIDAE) (FOSSIL)
- longissima, Chemnitzia longissima Stoppani, 1858 † - syn of: Trypanostylus geographicus Stoppani, 1858 † - (PYRAMIDELLIDAE) (FOSSIL)
- longissima, Melania longissima Münster, 1841 † - (THIARIDAE) (FOSSIL)
- longissima, Inella longissima (W.H. Dall, 1881) - (TRIPHORIDAE)
- longissima, Calyptogena longissima M. Yokoyama, 1925 - syn of: Calyptogena nipponica longissima (M. Yokoyama, 1925 †) - (VESICOMYIDAE)
- longissima, Calyptogena nipponica longissima (M. Yokoyama, 1925 †) - (VESICOMYIDAE) (FOSSIL)
- longissima, Yoldia longissima Slodkewitsch, 1936 † - (YOLDIIDAE) (FOSSIL)
- longissimum, Gonatocyrtoceras longissimum Dzik, 1984 † - (ACLEISTOCERATIDAE) (FOSSIL)
- longissimum, Cerithium longissimum M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1882 - (CERITHIIDAE)
- longissimus, Japonactaeon longissimus Á. Valdés, 2008 - (ACTEONIDAE)
- longissimus, Belemnites longissimus J.S. Miller, 1826 † - (BELEMNITELLIDAE) (FOSSIL)
- longissimus, Cerion longissimus (J.F. Gmelin, 1791) - (CERIONIDAE)
- longissimus, Donax longissimus S.G.A. Jaeckel, 1931 - syn of: Donax burnupi G.B. III Sowerby, 1894 - (DONACIDAE)
- longissimus, Fusinus longissimus (J.F. Gmelin, 1791) - (FASCIOLARIIDAE)
- longissimus, Murex longissimus J.F. Gmelin, 1791 - syn of: Fusinus longissimus (J.F. Gmelin, 1791) - (MURICIDAE)
- longissimus, Pseudohastites longissimus (Miller, 1826 †) - (PASSALOTEUTHIDIDAE) (FOSSIL)
- longistriata, Rissoina longistriata Paulmier, 2017 - (RISSOINIDAE)
- longistriatum, Fissidentalium longistriatum E.K. Yoo, 1988 † - (DENTALIIDAE) (FOSSIL)
- longitentaculata, Scintilla longitentaculata C.F. Lützen & C. Nielsen, 2005 - (GALEOMMATIDAE)
- longitesta, Canthidomus macrosculpturata longitesta Papp, 1953 † - (MELANOPSIDAE) (FOSSIL)
- Longitrella, Subgenus Mitrella (Longitrella) A.A. Olsson, 1942 (COLUMBELLIDAE)
- longitrorsa, Antalis longitrorsa (L.A. Reeve, 1842) - (DENTALIIDAE)
- longitrorsum, Laevidentalium longitrorsum L.A. Reeve, 1843 - syn of: Antalis longitrorsa (L.A. Reeve, 1842) - (LAEVIDENTALIIDAE)
- longituba, Barnaia longituba (B. Páll-Gergely & O. Gargominy, 2017) - (PUPINIDAE)
- longituba, Streptaulus longituba B. Páll-Gergely & O. Gargominy, 2017 - syn of: Barnaia longituba (B. Páll-Gergely & O. Gargominy, 2017) - (PUPINIDAE)
- longitudinale, Warburgoceras longitudinale (Angelin & Lindström, 1880 †) - (URANOCERATIDAE) (FOSSIL)
- longitudinale, Uranoceras longitudinale Angelin & Lindström, 1880 † - syn of: Warburgoceras longitudinale (Angelin & Lindström, 1880 †) - (URANOCERATIDAE) (FOSSIL)
- longitudinalis, Boiotremus longitudinalis (Lindström, 1884 †) - (BUCANIIDAE) (FOSSIL)
- longitudinalis, Scutalus longitudinalis F. Haas, 1955 - (BULIMULIDAE)
- longitudinalis, Conus longitudinalis Pilsbry & Johnson, 1917 † - (CONIDAE) (FOSSIL)
- longitudinalis, Spondylus longitudinalis J.B.P.A. Lamarck, 1819 - (SPONDYLIDAE)
- longitudinalis, Spondylus longitudinalis G.B. II Sowerby, 1847 - syn of: Spondylus tenuis K. Schreibers, 1793 - (SPONDYLIDAE)
- longiuscula, Leptachatina longiuscula C.M. Cooke, 1910 - (AMASTRIDAE)
- longiuscula, Nematurella subcarinata longiuscula F. Sacco, 1895 † - (HYDROBIIDAE) (FOSSIL)
- longiuscula, Ostrea longiuscula L.H. Hupé in C. Gay, 1854 - syn of: Ostrea chilensis R.A. Philippi, 1844 - (OSTREIDAE)
- longiuscula, Syrnola longiuscula A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- longiuscula, Eulimella longiuscula A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- longiuscula, Ribeirina longiuscula Billings, 1865 † - syn of: Ribeirina longiscula (Billings, 1865 †) - (RIBEIRIIDAE) (FOSSIL)
- longiusculoides, Fusinus longiusculoides C.J. Maury, 1912 † - (FASCIOLARIIDAE) (FOSSIL)
- longiusculus, Gonionuculites longiusculus (Beushausen, 1895 †) - (MALLETIIDAE) (FOSSIL)
- longivaricosa, Marginella longivaricosa J.B.P.A. Lamarck, 1822 - syn of: Prunum guttatum (L.W. Dillwyn, 1817) - (MARGINELLIDAE)
- longivaricosa, Prunum longivaricosa J.B.P.A. Lamarck, 1822 - syn of: Prunum guttatum (L.W. Dillwyn, 1817) - (MARGINELLIDAE)
- Longiverena, Subgenus Hemisinus (Longiverena) Pilsbry & Olsson, 1935 † (THIARIDAE) (FOSSIL)
- longjiangensis, Megalodon longjiangensis Liang, 1980 † - (MEGALODONTIDAE) (FOSSIL)
- longjubaensis, Chartronella longjubaensis Pan, 1982 † - (ATAPHRIDAE) (FOSSIL)
- longleyi, Texapyrgus longleyi F.G. Thompson & R. Hershler, 1991 - (HYDROBIIDAE)
- longleyi, Onustus longleyi (P. Bartsch, 1931) - (XENOPHORIDAE)
- longleyi, Xenophora longleyi P. Bartsch, 1931 - syn of: Onustus longleyi (P. Bartsch, 1931) - (XENOPHORIDAE)
- longlingensis, Cylicioscapha longlingensis Pan, 1985 † - (EUOMPHALIDAE) (FOSSIL)
- longmani, Puzosia longmani Whitehouse, 1926 † - (DESMOCERATIDAE) (FOSSIL)
- longmani, Transtrafer longmani T. Iredale, 1929 - syn of: Vitularia miliaris (J.F. Gmelin, 1791) - (MURICIDAE)
- longmenshanensis, Sichuanobelus longmenshanensis Zhu & Bian, 1984 † - (SINOBELEMNITIDAE) (FOSSIL)
- Longmenshanoceras, Genus Longmenshanoceras Zhao & al., 1978 † (PLEURONODOCERATIDAE) (FOSSIL)
- longnorensis, Stephanozyga longnorensis Longst 1933 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- longoastensis, Nassarius longoastensis (F. Sacco, 1890 †) - (NASSARIIDAE) (FOSSIL)
- longobardicus, Spirostylus longobardicus E.A.L. Kittl, 1899 † - (SPIROSTYLIDAE) (FOSSIL)
- Longobardites, Genus Longobardites Bychkov, 1976 † (LONGOBARDITIDAE) (FOSSIL)
- LONGOBARDITIDAE Spath, 1951 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-DANUBITOIDEA [Superfamily]) (FOSSIL)
- Longobarditoides, Genus Longobarditoides Shevyrev , 1961 † (LONGOBARDITIDAE) (FOSSIL)
- Longoconcha, Genus Longoconcha Stephenson, 1941 † (PHOLIDOTOMIDAE) (FOSSIL)
- longone, Venus longone A.G. Olivi, 1792 - syn of: Polititapes rhomboides (T. Pennant, 1777) - (VENERIDAE)
- Longosoma, Genus Longosoma Wesselingh, 2006 † (COCHLIOPIDAE) (FOSSIL)
- longostoma, Oxychona longostoma K.T. Menke, 1828 - syn of: Oxychona lonchostoma (K.T. Menke, 1828) - (BULIMULIDAE)
- longshanensis, Pteronitella longshanensis Zhang, 1984 † - (PTERINEIDAE) (FOSSIL)
- longsonensis, Camaena longsonensis (L.J. Morlet, 1891) - (CAMAENIDAE)
- longsonensis, Satsuma longsonensis P.M.A. Morelet, 1891 - (CAMAENIDAE)
- longsonensis, Cyclophorus longsonensis L.J. Morlet, 1891 - (CYCLOPHORIDAE)
- longsonensis, Helix longsonensis L.J. Morlet, 1891 - syn of: Camaena longsonensis (L.J. Morlet, 1891) - (HELICIDAE)
- longstaffae, Charopa longstaffae (H.H. Suter, 1913) - (CHAROPIDAE)
- longstaffae, Endodonta longstaffae H.H. Suter, 1913 - syn of: Charopa longstaffae (H.H. Suter, 1913) - (ENDODONTIDAE)
- longstaffae, Pupisoma longstaffae H.H. Godwin-Austen, 1910 - (VERTIGINIDAE)
- longstaffi, Trophonella longstaffi (E.A. Smith, 1907) - (MURICIDAE)
- Longstaffia, Genus Longstaffia Cossmann, 1908 † (LOPHOSPIRIDAE) (FOSSIL)
- longtanensis, Euchondria longtanensis Gu & H.X. Liu, 1976 † - (EUCHONDRIIDAE) (FOSSIL)
- longtangshanensis, Sinoennea longtangshanensis Zhang, T.C. C. Cheng & C. Chen, 2015 - (DIAPHERIDAE)
- longula, Omphalotropis longula A. Mousson, 1870 - (ASSIMINEIDAE)
- longula, Dendrodoris longula A. Pruvot-Fol, 1951 - (DENDRODORIDIDAE)
- longula, Doris longula F.D. Abraham, 1877 - (DORIDIDAE)
- longula, Anatimya longula Stephenson 1952 † - (LATERNULIDAE) (FOSSIL)
- longula, Bahiensis longula (L. Pfeiffer, 1859) - (ODONTOSTOMIDAE)
- longula, Euglandina longula (P.H. Fischer & J.C.H. Crosse, 1870) - (SPIRAXIDAE)
- Longulatus, Genus Longulatus Lyashenko, 1969 † (TENTACULITIDA (UNASSIGNED)) (FOSSIL)
- longulus, Bulimus longulus L. Pfeiffer, 1859 - syn of: Bahiensis longula (L. Pfeiffer, 1859) - (BULIMULIDAE)
- longulus, Diplodon longulus T.A. Conrad, 1874 † - (HYRIIDAE) (FOSSIL)
- longulus, Rossiites longulus (Lyashenko, 1980 †) - (ROSSIITIDAE) (FOSSIL)
- longum, Hamiticeras longum Kakabadze & Hoedemaeker, 2004 † - (ANCYLOCERATIDAE) (FOSSIL)
- longum, Tropaeum longum Kakabadze, 1981 † - (ANCYLOCERATIDAE) (FOSSIL)
- longum, Dentalium longum B. Sharp & H.A. Pilsbry, 1897 - syn of: Episiphon longum (B. Sharp & H.A. Pilsbry, 1897) - (DENTALIIDAE)
- longum, Ectenoceras longum Ulrich & al., 1943 † - (ELLESMEROCERATIDAE) (FOSSIL)
- longum, Episiphon longum (B. Sharp & H.A. Pilsbry, 1897) - (GADILINIDAE)
- longum, Macrodiceras longum Karczewski, 1969 † - (LASAEIDAE) (FOSSIL)
- longum, Microdoma longum Mazaev, 1997 † - (MICRODOMATIDAE) (FOSSIL)
- longum, Amygdalum longum (H.G. Bronn, 1831 †) - (MYTILIDAE) (FOSSIL)
- longum, Miamoceras longum I.S. Barskov, 1972 † - (ONCOCERATIDAE) (FOSSIL)
- longum, Phragmoceras longum Barrande, 1847 † - (PHRAGMOCERATIDAE) (FOSSIL)
- longurio, Abida longurio A. Moquin-Tandon, 1856 - syn of: Abida secale affinis E.A. Rossmässler, 1839 - (CHONDRINIDAE)
- longurio, Telophaedusa longurio (O. Böttger & P.B. Schmacker, 1894) - (CLAUSILIIDAE)
- longurio, Fusus longurio H.C. Weinkauff, 1866 - syn of: Trophonopsis muricata (G. Montagu, 1803) - (FASCIOLARIIDAE)
- longurio, Euglandina turris longurio H.A. Pilsbry & T.D.A. Cockerell, 1926 - (SPIRAXIDAE)
- longurionis, Fusiconus longurionis (L.C. Kiener, 1847) - (CONIDAE)
- longurionis, Fusiconus longurionis (L.C. Kiener, 1847) - syn of: Fusiconus longurionis (L.C. Kiener, 1847) - (CONIDAE)
- longus, Colchidites longus Rouchadze, 1933 † - (ANCYLOCERATIDAE) (FOSSIL)
- longus, Falcidens longus A.H. Scheltema, 1998 - (CHAETODERMATIDAE)
- longus, Euconulus longus H.A. Pilsbry & Y. Hirase - (EUCONULIDAE)
- longus, Sachites longus Z.X. Qian, 1977 † - syn of: Halkieria sacciformis (Meshkova, 1969 †) - (HALKIERIIDAE) (FOSSIL)
- longus, Mesohibolithes longus (Shvetsov, 1913 †) - (MESOHIBOLITHIDAE) (FOSSIL)
- longus, Maculotriton serriale longus H.A. Pilsbry & E.G. Vanatta, 1904 - (MURICIDAE)
- longus, Orthalicus longus L. Pfeiffer, 1856 - (ORTHALICIDAE)
- longus, Oxymelania pleurostriatus longus H.A. Pilsbry & A. Hinkley, 1910 - (PACHYCHILIDAE)
- longus, Parallelodon longus Maslennikov, 1935 † - (PARALLELODONTIDAE) (FOSSIL)
- longus, Pecten longus Lutkevitch & Lobanova, 1960 † - syn of: Streblopteria levis Lutkevitch & Lobanova, 1960 † - (PECTINIDAE) (FOSSIL)
- longus, Johaniceramus longus (J. Henderson, 1915) - (UROCOPTIDAE)
- longus borjeensis, Johaniceramus longus borjeensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- longus lescaensis, Johaniceramus longus lescaensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- longus santacruzensis, Johaniceramus longus santacruzensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- longwelli, Palliseria longwelli T.W. Kirk, 1930 † - (MACLURITIDAE) (FOSSIL)
- longwoodensis, Gemmula longwoodensis Powell, 1942 † - (TURRIDAE) (FOSSIL)
- longyanense, Waagenoceras longyanense Chao & Liang, 1965 † - (CYCLOLOBIDAE) (FOSSIL)
- longyanensis, Claraia longyanensis C. Chen, 1976 † - (PTERINOPECTINIDAE) (FOSSIL)
- longzhaogouensis, Sinopsammobia longzhaogouensis Li, Yu, Yao & Gu 1982 † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- lonnbergi, Abralia lonnbergi G.J. Pfeffer, 1912 - syn of: Abraliopsis morisii (J.B. Vérany, 1839) - (ENOPLOTEUTHIDAE)
- Lonoa, Genus Lonoa W.H. Dall, P. Bartsch & H.A. Rehder, 1938 (SEMELIDAE)
- lonqueueanus, Diempterus lonqueueanus Buvignier in L.É.S. Piette, 1876 † - (SPINILOMATIDAE) (FOSSIL)
- lonsdalei, Devonorhineoderma lonsdalei (d'Archiac & de Verneuil, 1842 †) - (GOSSELETINIDAE) (FOSSIL)
- lonsdalei, Pseudomelania lonsdalei (Morris & Lycett) † - (PSEUDOMELANIIDAE) (FOSSIL)
- lonsdalii, Eodrillia lonsdalii (Lea, 1833 †) - (CLAVATULIDAE) (FOSSIL)
- lonsdalii, Pleurotomaria lonsdalii d'Archiac & de Verneuil, 1842 † - syn of: Devonorhineoderma lonsdalei (d'Archiac & de Verneuil, 1842 †) - (PLEUROTOMARIIDAE) (FOSSIL)
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