- kotakae, Penitella kotakae (S. Kanno & Matsuno, 1960 †) - (PHOLADIDAE) (FOSSIL)
- Kotakaia, Genus Kotakaia Beu, 1988 (PERSONIDAE) (FOSSIL)
- kotakamaruae, Neptunea kotakamaruae T. Kira, 1955 - syn of: Neptunea elegantula K. Itô & T. Habe, 1965 - (BUCCINIDAE)
- kotaklensis, Chlamys kotaklensis I. Hayami, 1957 † - (PECTINIDAE) (FOSSIL)
- kotanbulakensis, Prosocoelus kotanbulakensis Krasilova, 1962 † - (PROSOCOELIDAE) (FOSSIL)
- kotanensis, Discartemon kotanensis T. Siriboon & S. Panha, 2014 - (STREPTAXIDAE)
- Kotelnyoceras, Genus Kotelnyoceras Balashov, 1975 (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- Kotetishvilia, Genus Kotetishvilia Vermeulen 1997 (PULCHELLIIDAE) (FOSSIL)
- kotetishviliae, Heteroceras kotetishviliae Kakabadze, 1975 † - (HETEROCERATIDAE) (FOSSIL)
- kotljarae, Epadrianites kotljarae (Zakharov, 1983 †) - (ADRIANITIDAE) (FOSSIL)
- kotljarae, Basleoceras kotljarae Zakharov, 1983 † - syn of: Epadrianites kotljarae (Zakharov, 1983 †) - (GONIATITIDA (unassigned)) (FOSSIL)
- kotlusae, Lanzaia kotlusae J. Bole, 1992 - (HYDROBIIDAE)
- koto, Lamellaria koto J.S. Schwengel, 1944 - (VELUTINIDAE)
- Kotoceras, Genus Kotoceras Yabe , 1927 (DESMOCERATIDAE) (FOSSIL)
- kotoeae, Egilina kotoeae S. Hori & H. Fukuda, 1999 - (PYRAMIDELLIDAE)
- kotoi, Calliostoma kotoi K. Sakurai, 1994 - syn of: Calliostoma katoi (K. Sakurai, 1994) - (CALLIOSTOMATIDAE)
- kotoi, Maclurites kotoi Kobayashi, 1930 † - (MACLURITIDAE) (FOSSIL)
- kotorai, Pyrgiscus kotorai (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- kotorai, Pyrgiscilla kotorai S. Nomura, 1936 - syn of: Pyrgiscus kotorai (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- kotorai, Voluta kotorai E.J. Petuch, 1981 - syn of: Voluta polypleura kotorai (E.J. Petuch, 1981) - (VOLUTIDAE)
- kotorai, Voluta polypleura kotorai (E.J. Petuch, 1981) - (VOLUTIDAE)
- kotorana, Chlamys kotorana Y. Otuka, 1934 † - (PECTINIDAE) (FOSSIL)
- kotorana, Odostomia kotorana S. Nomura, 1937 - (PYRAMIDELLIDAE)
- Kotorapecten, Genus Kotorapecten Masuda 1962 (PECTINIDAE) (FOSSIL)
- kotoshoensis, Zaptyx kotoshoensis J.T. Kuroda, 1932 - (CLAUSILIIDAE)
- kotosyonis, Acusta kotosyonis J.T. Kuroda & T. Kano, MS - (BRADYBAENIDAE)
- kotosyonis, Ovachlamys kotosyonis (J.T. Kuroda & T. Kano, 1941) - (HELICARIONIDAE)
- kotrus, Proconulus kotrus Cataldo, 2017 † - (PROCONULIDAE) (FOSSIL)
- kotschetkovi, Malletoptychites kotschetkovi A.M. Popov, 1961 † - (PTYCHITIDAE) (FOSSIL)
- kotschyi, Alopia canescens kotschyi R. von Kimakowicz, 1966 - (CLAUSILIIDAE)
- kotschyi, Pene kotschyi (L. Pfeiffer, 1854) - (ENIDAE)
- kotschyi, Pseudamnicola kotschyi (G.R. von Frauenfeld, 1863) - (HYDROBIIDAE)
- kotschyi, Melanopsis kotschyi R.A. Philippi, 1847 - (MELANOPSIDAE)
- kotschyi, Priotrochus kotschyi (R.A. Philippi, 1849) - (TROCHIDAE)
- kotschyi, Thalotia kotschyi R.A. Philippi, 1849 - syn of: Priotrochus kotschyi (R.A. Philippi, 1849) - (TROCHIDAE)
- kotschyi, Trochus kotschyi R.A. Philippi, 1849 - syn of: Priotrochus kotschyi (R.A. Philippi, 1849) - (TROCHIDAE)
- kotti, Bisatoceras kotti Nassichuk, 1975 † - (BISATOCERATIDAE) (FOSSIL)
- kottingbrunnensis, Melanopsis kottingbrunnensis Handmann, 1882 † - (MELANOPSIDAE) (FOSSIL)
- kottlovskii, Kyminoceras kottlovskii † - syn of: Rudolfoceras keadyi Hook & Flower, 1977 † - (PROTOCYCLOCERATIDAE) (FOSSIL)
- kottlowski, Neostlingoceras kottlowski Cobban & Hook, 1981 † - (TURRILITIDAE) (FOSSIL)
- kottlowskii, Kyminoceras kottlowskii Hook & Flower, 1977 † - (PROTOCYCLOCERATIDAE) (FOSSIL)
- kotulae, Semilimax kotulae C.A. Westerlund, 1883 - (VITRINIDAE)
- kotulai, Semilimax kotulai (C.A. Westerlund, 1883) - (VITRINIDAE)
- Kotuyitheca, Genus Kotuyitheca Missarzhevsky , 1974 (CIRCOTHECIDAE) (FOSSIL)
- kotyensis, Gerstfeldtiancylus kotyensis Y.I. Starobogatov, 1989 - (ACROLOXIDAE)
- kotyensis, Benedictia kotyensis P.V. Matiokin, Dzuban & T.Y. Sitnikova, 1988 - (LITHOGLYPHIDAE)
- Kotysium, Genus Kotysium Hornύ , 1961 (TRYBLIDIIDAE) (FOSSIL)
- kouangensis, Lamprotula kouangensis (C.T. Simpson, 1900) - (UNIONIDAE)
- kouaouae, Gymnodoris kouaouae (J.J. Risbec, 1928) - (GYMNODORIDIDAE)
- kouhaiensis, Jupiteria kouhaiensis J. Marwick, 1931 † - (NUCULANIDAE) (FOSSIL)
- koukae, Pionoconus koukae E. Monnier, L. Limpalaër & A. Robin, 2013 - (CONIDAE)
- koulabicus, Thomasites koulabicus Kler, 1909 † - (PSEUDOTISSOTIIDAE) (FOSSIL)
- koumacensis, Hypselodoris koumacensis W.B. Rudman, 1995 - syn of: Hypselodoris kaname K. Baba, 1994 - (CHROMODORIDIDAE)
- koumaci, Arca koumaci K.A. Lutaenko & P. Maestrati, 2007 - (ARCIDAE)
- koumacia, Solelucina koumacia E.A. Glover & Taylor, 2007 - (LUCINIDAE)
- kounjianum, Calliostoma kounjianum M. Yokoyama, 1928 † - (CALLIOSTOMATIDAE) (FOSSIL)
- Kourazoceras, Genus Kourazoceras Becker , 2002 (TORNOCERATIDAE) (FOSSIL)
- koureos, Galeodea koureos Gardner, 1939 † - (CASSIDAE) (FOSSIL)
- kouriatchyi, Elliptotellina kouriatchyi Furon 1948 † - (TELLINIDAE) (FOSSIL)
- koutaisanus, Longiphallus koutaisanus (A. Mousson, 1863) - (OXYCHILIDAE)
- koutaisanus mingrelicus, Longiphallus koutaisanus mingrelicus (A. Mousson, 1863) - (OXYCHILIDAE)
- koutaisianum, Unio koutaisianum W. Kobelt, 1886 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- koutaisianus, Oxychilus koutaisianus A. Mousson, 1863 - (OXYCHILIDAE)
- kovaci, Radix kovaci T.A. Neubauer & M. Harzhauser, 2015 - (LYMNAEIDAE)
- kovacovense, Laevicardium kovacovense Senes, 1958 † - (CARDIIDAE) (FOSSIL)
- kovacsi, Parasteroceras kovacsi Geczy & Meister, 2007 † - (ARIETITIDAE) (FOSSIL)
- kovacsi, Comarmondia kovacsi Varga & Páll-Gergely, 2017 - (CLATHURELLIDAE)
- kovacsi, Kovacsia kovacsi (A. Varga & I. Pintér, 1972) - (HYGROMIIDAE)
- kovacsi, Bellardiella kovacsi A. Varga & B. Páll-Gergely, 2017 - (PUPINIDAE)
- Kovacsia, Genus Kovacsia H. Nordsieck, 1993 (HYGROMIIDAE)
- kovacsorum, Montenegrina prokletiana kovacsorum Z. Fehér & M. Szekeres, 2016 - (CLAUSILIIDAE)
- kovalenkoi, Deweveria kovalenkoi Smyshlyaeva & Zakharov, 2015 † - (HEMILECANITIDAE) (FOSSIL)
- kovalisi, Lioconcha kovalisi R. De Prins, 2013 - (VENERIDAE)
- kovatchevi, Linga kovatchevi Karagyuleva, 1964 † - (LUCINIDAE) (FOSSIL)
- kovatschensis, Ancilla kovatschensis A. Oleinik, 1991 † - (ANCILLARIIDAE) (FOSSIL)
- kovatschensis, Nemocardium kovatschensis L. Krishtofovich, 1947 † - (CARDIIDAE) (FOSSIL)
- kovatschensis, Acesta kovatschensis V.N. Sinelnikova, 1991 † - (LIMIDAE) (FOSSIL)
- kovatschensis, Limatula kovatschensis Ilyina, 1959 † - (LIMIDAE) (FOSSIL)
- kovatschensis, Mya kovatschensis L. Krishtofovich, 1947 † - (MYIDAE) (FOSSIL)
- kovatschensis, Brachidontes kovatschensis Krishtofovich, 1981 † - (MYTILIDAE) (FOSSIL)
- kovatschensis, Leionucula kovatschensis V.N. Sinelnikova, 1991 † - (NUCULIDAE) (FOSSIL)
- kovatschensis, Acila kovatschensis Krishtofovich, 1947 † - (NUCULIDAE) (FOSSIL)
- kovatschensis, Solen kovatschensis L. Krishtofovich, 1947 † - (SOLENIDAE) (FOSSIL)
- kovatschensis, Macoma kovatschensis V.N. Sinelnikova, 1991 † - (TELLINIDAE) (FOSSIL)
- kovatschensis, Thracia kovatschensis L. Krishtofovich, 1947 † - (THRACIIDAE) (FOSSIL)
- kovatschensis, Macrocallista kovatschensis Krishtofovich, 1947 † - (VENERIDAE) (FOSSIL)
- kovatschensis, Yoldia kovatschensis (Slodkewitsch, 1938 †) - (YOLDIIDAE) (FOSSIL)
- Kowalatrochus, Genus Kowalatrochus Krawczyński, 2002 (PSEUDOPHORIDAE) (FOSSIL)
- kowalczyki, Puisseguria kowalczyki (W.R. Schlickum & F. Strauch, 1972 †) - (ELONIDAE) (FOSSIL)
- kowaldi, Dominamaria kowaldi (C. Hedley, 1891) - (ASSIMINEIDAE)
- kowalensis, Cymaclymenia kowalensis Pajchlowa, 1972 † - (CYMACLYMENIIDAE) (FOSSIL)
- kowalensis, Kosmoclymenia kowalensis Czarnocki, 1979 † - (KOSMOCLYMENIIDAE) (FOSSIL)
- kowalevskyi, Pseudovermis kowalevskyi L. Salvini-Plawén & W. Sterrer, 1968 - syn of: Pseudovermis kowalewskyi L. Salvini-Plawén & W. Sterrer, 1968 - (PSEUDOVERMIDAE)
- kowalewskii, Clavatula kowalewskii W. Baluk, 2003 † - (CLAVATULIDAE) (FOSSIL)
- kowalewskii, Electrea kowalewskii Klebs, 1886 † - (COCHLOSTOMATIDAE) (FOSSIL)
- kowalewskii, Pyrgula kowalewskii (S. Clessin & W. Dybowski in W. Dybowski, 1888) - (HYDROBIIDAE)
- kowalewskyi, Pseudovermis kowalewskyi L. Salvini-Plawén & W. Sterrer, 1968 - (PSEUDOVERMIDAE)
- kowalewskyi, Firoloida kowalewskyi A.J.B.M. Vayssière, 1904 - syn of: Firoloida desmarestia C.A. Lesueur, 1817 - (PTEROTRACHEIDAE)
- Kowalia, Genus Kowalia Pajchlowa, 1972 (GLATZIELLIDAE) (FOSSIL)
- kowanensis, Obba papilla kowanensis G. Bollinger, 1918 - (CAMAENIDAE)
- koweitensis, Paraclathurella koweitensis (J.C. Melvill, 1904) - (CLATHURELLIDAE)
- kowieensis, Austromitra kowieensis (G.B. III Sowerby, 1901) - (COSTELLARIIDAE)
- kowieensis, Fusus kowieensis W.H. Turton, 1932 - syn of: Afer africanus (G.B. III Sowerby, 1897) - (FASCIOLARIIDAE)
- kowieensis, Afritrophon kowieensis (G.B. III Sowerby, 1901) - (MURICIDAE)
- kowiensis, Solarium kowiensis W.H. Turton, 1932 - syn of: Psilaxis radiatus (P.F. Röding, 1798) - (ARCHITECTONICIDAE)
- kowiensis, Bursa kowiensis W.H. Turton, 1932 - syn of: Bursa granularis (P.F. Röding, 1798) - (BURSIDAE)
- kowiensis, Clionella rosaria kowiensis (W.H. Turton, 1932) - (CLAVATULIDAE)
- kowiensis, Zafrona kowiensis W.H. Turton, 1932 - syn of: Zafrona trifilosa (E.A. Smith, 1882) - (COLUMBELLIDAE)
- kowiensis, Columbella kowiensis W.H. Turton, 1932 - syn of: Zafrona trifilosa (E.A. Smith, 1882) - (COLUMBELLIDAE)
- kowiensis, Epitonium kowiensis W.H. Turton, 1932 - syn of: Opalia aglaia (P. Bartsch, 1915) - (EPITONIIDAE)
- kowiensis, Curveulima kowiensis (W.H. Turton, 1932) - (EULIMIDAE)
- kowiensis, Limea kowiensis (W.H. Turton, 1932) - (LIMIDAE)
- kowiensis, Littorina kowiensis W.H. Turton, 1932 - syn of: Afrolittorina knysnaensis (C.F.F. von Krauss in R.A. Philippi, 1847) - (LITTORINIDAE)
- kowiensis, Nodilittorina kowiensis W.H. Turton, 1932 - syn of: Afrolittorina knysnaensis (C.F.F. von Krauss in R.A. Philippi, 1847) - (LITTORINIDAE)
- kowiensis, Mangelia kowiensis W.H. Turton, 1932 - (MANGELIIDAE)
- kowiensis, Marginella kowiensis W.H. Turton, 1932 - syn of: Alaginella atracta (J.R. le B. Tomlin, 1918) - (MARGINELLIDAE)
- kowiensis, Natica kowiensis W.H. Turton, 1932 - syn of: Natica simplex G.B. III Sowerby, 1897 - (NATICIDAE)
- kowiensis, Philobrya kowiensis W.H. Turton, 1932 - syn of: Adacnarca velaini (E.A. Smith, 1904) - (PHILOBRYIDAE)
- kowiensis, Adacnarca kowiensis W.H. Turton, 1932 - syn of: Adacnarca velaini (E.A. Smith, 1904) - (PHILOBRYIDAE)
- kowiensis, Alvania kowiensis J.R. le B. Tomlin, 1931 - (RISSOIDAE)
- kowiensis, Euterebra kowiensis (W.H. Turton, 1932) - (TEREBRIDAE)
- kowiensis, Thracia kowiensis W.H. Turton, 1932 - (THRACIIDAE)
- kowiensis, Clanculus kowiensis W.H. Turton, 1932 - syn of: Clanculus miniatus (H.E. Anton, 1838) - (TROCHIDAE)
- kowiensis, Gazameda kowiensis (G.B. III Sowerby, 1900) - (TURRITELLIDAE)
- kowiensis viridis, Clionella kowiensis viridis W.H. Turton, 1932 - syn of: Clionella rosaria (L.A. Reeve, 1846) - (CLAVATULIDAE)
- koyaensis, Acteocina koyaensis M. Yokoyama, 1927 † - syn of: Acteocina koyasensis (M. Yokoyama, 1927 †) - (ACTEOCINIDAE) (FOSSIL)
- koyamai, Ancistrolepis eucosmius koyamai T. Habe & K. Itô, 1971 - (BUCCINIDAE)
- koyamai, Lienardia koyamai L. Bozzetti, 2007 - (CLATHURELLIDAE)
- koyamai, Epitonium koyamai (T. Nakayama, 1995) - (EPITONIIDAE)
- koyamai, Peasistilifer koyamai (T. Habe, 1976) - (EULIMIDAE)
- koyamai, Helicarion koyamai J.T. Kuroda, 1953 - (HELICARIONIDAE)
- koyamai, Thracia koyamai (T. Habe, 1981) - (THRACIIDAE)
- koyanoi, Helicarion koyanoi T. Habe, 1953 - (HELICARIONIDAE)
- koyasensis, Acteocina koyasensis (M. Yokoyama, 1927 †) - (ACTEOCINIDAE) (FOSSIL)
- koyasensis, Tornatina koyasensis M. Yokoyama, 1927 † - syn of: Acteocina koyasensis (M. Yokoyama, 1927 †) - (CYLICHNIDAE) (FOSSIL)
- koyuana, Voluta koyuana M. Yokoyama, 1928 † - syn of: Lyria hirugaensis (M. Yokoyama, 1928 †) - (VOLUTIDAE) (FOSSIL)
- kozaiensis, Babylonia kozaiensis S. Nomura, 1939 - syn of: Babylonia lutosa (J.B.P.A. Lamarck, 1816) - (BABYLONIIDAE)
- kozaiensis, Littoraria kozaiensis S. Nomura & H. Onishi, 1940 - (LITTORINIDAE)
- kozaiensis kokozurana, Babylonia kozaiensis kokozurana S. Nomura, 1939 - syn of: Babylonia lutosa (J.B.P.A. Lamarck, 1816) - (BABYLONIIDAE)
- Kozelconcha, Genus Kozelconcha Frύda , 1998 (KITTLIDISCIDAE) (FOSSIL)
- kozhimensis, Finiclymenia kozhimensis (Bogoslovsky, 1981 †) - (GONIOCLYMENIIDAE) (FOSSIL)
- Kozhimites, Genus Kozhimites Kusina, 1971 (MUENSTEROCERATIDAE) (FOSSIL)
- kozhovi, Choanomphalus kozhovi J. Beckmann & Y.I. Starobogatov, 1975 - (PLANORBIDAE)
- kozhovi, Helicorbis kozhovi Y.I. Starobogatov & E.A. Streletzkaja, 1967 - (PLANORBIDAE)
- kozhovi, Galileja kozhovi Y.I. Starobogatov & E.A. Streletzkaja, 1967 - syn of: Pisidium nitidum L. Jenyns, 1832 - (SPHAERIIDAE)
- kozhovi, Megalovalvata kozhovi T.Y. Sitnikova, 1983 - (VALVATIDAE)
- Kozhovisulcifer, Subgenus Choanomphalus (Kozhovisulcifer) J. Beckmann, 1975 (PLANORBIDAE)
- kozlowskii, Macrodiceras kozlowskii Karczewski, 1969 † - (LASAEIDAE) (FOSSIL)
- kozlowskii, Uraloclymenia kozlowskii (Czarnocki, 1989 †) - (PACHYCLYMENIIDAE) (FOSSIL)
- kozlowskii, Borkowia kozlowskii Czarnocki, 1989 † - syn of: Uraloclymenia kozlowskii (Czarnocki, 1989 †) - (PACHYCLYMENIIDAE) (FOSSIL)
- kozuri, Julfotirolites kozuri W. Korn & Ghaderi, 2015 † - (DZHULFITIDAE) (FOSSIL)
- kpone, Felimida kpone (M. Edmunds, 1981) - (CHROMODORIDIDAE)
- kpone, Doris kpone M. Edmunds, 2013 - (DORIDIDAE)
- krabi, Alaona krabi M. Huber, A. Langleit & K. Kreipl, 2015 - (TELLINIDAE)
- krabiensis, Conus krabiensis A.J. Da Motta, 1982 - syn of: Strategoconus generalis (C. Linnaeus, 1767) - (CONIDAE)
- krabiensis, Diplommatina krabiensis S. Panha & J.B. Burch, 1998 - (DIPLOMMATINIDAE)
- krachi, Sigmesalia krachi F. Traub, 1979 † - (TURRITELLIDAE) (FOSSIL)
- Krachia, Genus Krachia W. Baluk, 1975 (CERITHIOPSIDAE)
- Krachiopsis, Genus Krachiopsis C. Smriglio & P. Mariottini, 1999 (CERITHIOPSIDAE)
- kraciukae, Xestoconcha kraciukae Pojeta & Gilbert-Tomlinson, 1977 † - (COLPOMYIDAE) (FOSSIL)
- kraemmeri, Coralliophila kraemmeri J. Knudsen, 1956 - (MURICIDAE)
- kraemmeri, Abra kraemmeri M. Nicklés, 1955 - (SEMELIDAE)
- kraepelini, Clavatula kraepelini (H. Strebel, 1914) - (CLAVATULIDAE)
- kraepelini extensesculpta, Clavatula kraepelini extensesculpta (H. Strebel, 1914) - (CLAVATULIDAE)
- kraepelini nana, Clavatula kraepelini nana (H. Strebel, 1914) - (CLAVATULIDAE)
- kraepelini pallida, Clavatula kraepelini pallida H. Strebel, 1914 - (CLAVATULIDAE)
- kraffti, Koninckites kraffti Spath, 1934 † - syn of: Radioceras kraffti (Spath, 1934 †) - (BEYRICHITIDAE) (FOSSIL)
- kraffti, Krafftoceras kraffti Diener, 1903 † - syn of: Cyclolobus walkeri Diener, 1903 † - (CYCLOLOBIDAE) (FOSSIL)
- kraffti, Anaxenaspis kraffti Tozer, 1994 † - (FLEMINGITIDAE) (FOSSIL)
- kraffti, Radioceras kraffti (Spath, 1934 †) - (GYRONITIDAE) (FOSSIL)
- kraffti, Koipatoceras kraffti Bucher, 1994 † - (KHVALYNITIDAE) (FOSSIL)
- kraffti, Meekoceras kraffti Shevyrev, 1990 † - (MEEKOCERATIDAE) (FOSSIL)
- kraffti, Juvenites kraffti Smith, 1927 † - (MELAGATHICERATIDAE) (FOSSIL)
- kraffti, Uhligites kraffti (Uhlig, 1903 †) - (OPPELIIDAE) (FOSSIL)
- kraffti, Pleurogyronites kraffti Tozer, 1994 † - (PROPTYCHITIDAE) (FOSSIL)
- Kraffticeras, Genus Kraffticeras Brόhwiler & al., 2012 (KASHMIRITIDAE) (FOSSIL)
- Krafftoceras, syn of: Genus Cyclolobus Waagen , 1879 (CYCLOLOBIDAE) (FOSSIL)
- krafti, Pygmaeoconus krafti Horný, 1997 † - (HYPSELOCONIDAE) (FOSSIL)
- Kraikchania, Genus Kraikchania (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- krakatoa, Hypselodoris krakatoa T.M. Gosliner & R.F. Johnson, 1999 - (CHROMODORIDIDAE)
- krakoviense, Kheraites krakoviense (M. von Neumayr, 1871 †) - (OPPELIIDAE) (FOSSIL)
- krakstadi, Turbonilla krakstadi F. Lygre & C.F.C. Schander, 2010 - (PYRAMIDELLIDAE)
- kralendijki, Cerion uva kralendijki H.B. Baker, 1924 - (CERIONIDAE)
- kraliki, Abida kraliki A. Letourneux, 1877 - syn of: Abida secale (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- kraliki, Ortizius kraliki G. Servain, 1880 - syn of: Ortizius rateranus (G. Servain, 1880) - (OXYCHILIDAE)
- Kralovna, Genus Kralovna Barrande, 1881 (PRAECARDIIDAE) (FOSSIL)
- krambergeri, Caspia krambergeri (Lörenthey, 1902 †) - (HYDROBIIDAE) (FOSSIL)
- krambergeri, Valenciennius krambergeri (R. Hoernes, 1901 †) - (LYMNAEIDAE) (FOSSIL)
- krambergeri, Melanopsis krambergeri Š. Brusina, 1884 † - (MELANOPSIDAE) (FOSSIL)
- krambergeri, Anisus krambergeri (Halaváts, 1903 †) - (PLANORBIDAE) (FOSSIL)
- krambergeri, Holandriana krambergeri (Š. Brusina, 1892 †) - (PLEUROCERIDAE) (FOSSIL)
- Krameriella, Genus Krameriella Frύda & Heidelberger, 2003 (VLTAVIELLIDAE) (FOSSIL)
- krampi, Mohnia krampi (G.A.W. Thorson, 1951) - (BUCCINIDAE)
- Kranaosphinctes, Subgenus Perisphinctes (Kranaosphinctes) Choffat, 1893 (PERISPHINCTIDAE) (FOSSIL)
- kranjiensis, Dendrodoris kranjiensis C.F. Lim & L.M. Chou, 1970 - (DENDRODORIDIDAE)
- krantzi, Gordenella krantzi (Rouillier, 1848 †) - (GORDENELLIDAE) (FOSSIL)
- Krapfiella, Genus Krapfiella H.B. Preston, 1911 (SUBULINIDAE)
- krapinensis, Holandriana krapinensis (J.R. Bourguignat, 1884) - (PLEUROCERIDAE)
- krapinensis, Melanella krapinensis J.R. Bourguignat, 1884 - syn of: Holandriana krapinensis (J.R. Bourguignat, 1884) - (PLEUROCERIDAE)
- krappei, Teredo krappei C.E. von Moll, 1935 - syn of: Teredo furcifera E.C. Von Martens, 1894 - (TEREDINIDAE)
- krasnopolski, Clymenia krasnopolski Tschernyscheff, 1887 † - syn of: Protactoclymenia krasnopolski (Tschernyscheff, 1887 †) - (CLYMENIIDAE) (FOSSIL)
- krasnopolski, Protactoclymenia krasnopolski (Tschernyscheff, 1887 †) - (CYRTOCLYMENIIDAE) (FOSSIL)
- krasnovi, Bicingulites krasnovi Lyashenko, 1969 † - (TURMALITIDAE) (FOSSIL)
- krasnovidovoensis, Palaeostylus krasnovidovoensis Mazaev, 2015 † - (PALAEOSTYLIDAE) (FOSSIL)
- Krasopea, Genus Krasopea Hornύ , 1992 (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Kraterochiton, Genus Kraterochiton Hoare , 2000 (ACUTICHITONIDAE) (FOSSIL)
- kratycylindros, Pelycidion kratycylindros L.D. Stephens & P. Vafiadis, 2013 - (PELYCIDIIDAE)
- krauseana, Semele krauseana R. Tate, 1887 † - (SEMELIDAE) (FOSSIL)
- krausei, Granotoma krausei (W.H. Dall, 1887) - (MANGELIIDAE)
- krausei, Oenopota krausei W.H. Dall, 1887 - syn of: Granotoma krausei (W.H. Dall, 1887) - (MANGELIIDAE)
- krausei, Mycetopus krausei H.F.A. von Ihering, 1910 - syn of: Mycetopoda siliquosa (J.B. von Spix, 1827) - (MYCETOPODIDAE)
- krausei, Dichotomites krausei Kemper, 1978 † - (POLYPTYCHITIDAE) (FOSSIL)
- krausei, Odostomia krausei S. Clessin, 1890 - syn of: Turbonilla candida (A. Adams, 1855) - (PYRAMIDELLIDAE)
- krausei, Lora krausei W.H. Dall, 1887 - syn of: Granotoma krausei (W.H. Dall, 1887) - (TURRIDAE)
- krausei regulus, Granotoma krausei regulus (W.H. Dall, 1919) - (MANGELIIDAE)
- krauseri, Pollia krauseri J. Tröndlé, 2013 - (BUCCINIDAE)
- krausii, Clionella krausii E.A. Smith, 1877 - syn of: Clionella kraussii (E.A. Smith, 1877) - (CLAVATULIDAE)
- krausii, Liotia krausii J.E. Gray, 1850 - syn of: Pseudotorinia kraussi (J.E. Gray in M.E. Gray, 1850) - (LIOTIIDAE)
- krausii, Pleurotoma krausii E.A. Smith, 1877 - syn of: Clionella kraussii (E.A. Smith, 1877) - (TURRIDAE)
- kraussi, Metachatina kraussi (L.A. Reeve, 1842) - (ACHATINIDAE)
- kraussi, Pseudotorinia kraussi (J.E. Gray in M.E. Gray, 1850) - (ARCHITECTONICIDAE)
- kraussi, Barbatia kraussi (C.F.F. von Krauss, 1848) - (ARCIDAE)
- kraussi, Arca kraussi R.A. Philippi, 1848 - syn of: Arca patriarchalis P.F. Röding, 1798 - (ARCIDAE)
- kraussi, Cavolinia kraussi J.J. Tesch, 1913 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- kraussi, Conus kraussi W.H. Turton, 1932 - syn of: Ketyconus tinianus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- kraussi, Pusia kraussi R.W. Dunker, 1861 - syn of: Pusia inerme (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- kraussi, Cassidula kraussi (H.C. Küster, 1844) - (ELLOBIIDAE)
- kraussi, Epitonium kraussi (P. Nyst, 1871) - (EPITONIIDAE)
- kraussi, Glycymeris kraussi K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Glycymeris connollyi J.R. le B. Tomlin, 1926 - (GLYCYMERIDIDAE)
- kraussi, Haliotis kraussi W.H. Turton, 1932 - syn of: Haliotis parva C. Linnaeus, 1758 - (HALIOTIDAE)
- kraussi, Bythiospeum kraussi (C.D. Weinland, 1883) - (HYDROBIIDAE)
- kraussi, Littoraria kraussi J.P. Rosewater, 1970 - syn of: Littoraria coccinea glabrata (R.A. Philippi, 1846) - (LITTORINIDAE)
- kraussi, Littorina kraussi J.P. Rosewater, 1970 - syn of: Littoraria coccinea glabrata (R.A. Philippi, 1846) - (LITTORINIDAE)
- kraussi, Mactra kraussi W.H. Turton, 1932 - syn of: Mactrotoma depressa (L. Spengler, 1802) - (MACTRIDAE)
- kraussi, Mangelia kraussi W.H. Turton, 1932 - (MANGELIIDAE)
- kraussi, Volvarina zonata kraussi W.H. Turton, 1932 - (MARGINELLIDAE)
- kraussi, Nassa kraussi W.H. Turton, 1932 - syn of: Nassarius capensis (R.W. Dunker, 1846) - (NASSARIIDAE)
- kraussi, Bullia kraussi W.H. Turton, 1932 - syn of: Bullia pura J.C. Melvill, 1885 - (NASSARIIDAE)
- kraussi, Eunaticina kraussi (E.A. Smith, 1902) - (NATICIDAE)
- kraussi, Pisotrigonia kraussi (Kitchin, 1908 †) - (PTEROTRIGONIIDAE) (FOSSIL)
- kraussi, Turbonilla kraussi S. Clessin, 1890 - syn of: Turbonilla candida (A. Adams, 1855) - (PYRAMIDELLIDAE)
- kraussi, Gulella kraussi L. Pfeiffer - (STREPTAXIDAE)
- kraussi, Tellina kraussi W.H. Turton, 1932 - syn of: Tellina ponsonbyi G.B. III Sowerby, 1889 - (TELLINIDAE)
- kraussi, Clanculus kraussi R.A. Philippi, 1846 - syn of: Clanculus atricatena J.R. le B. Tomlin, 1921 - (TROCHIDAE)
- kraussi, Tapes kraussi L.A. Reeve, 1864 - syn of: Pitarenus cordatus (J.S. Schwengel, 1951) - (VENERIDAE)
- kraussi, Leidyula kraussi (A.E.J. Férussac, 1823) - (VERONICELLIDAE)
- kraussi, Zebina kraussi (W.H. Turton, 1932) - (ZEBINIDAE)
- kraussi albanyana, Columbella kraussi albanyana W.H. Turton, 1932 - syn of: Anachis kraussii (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- kraussiana, Nassa kraussiana R.W. Dunker, 1846 - syn of: Nassarius kraussianus (R.W. Dunker, 1846) - (NASSARIIDAE)
- kraussiana, Brachypodella kraussiana (C.D. Weinland, 1876) - (UROCOPTIDAE)
- kraussianum, Buccinum kraussianum R.W. Dunker, 1846 - syn of: Nassarius kraussianus (R.W. Dunker, 1846) - (BUCCINIDAE)
- kraussianum, Nassa kraussianum R.W. Dunker, 1846 - syn of: Nassarius kraussianus (R.W. Dunker, 1846) - (NASSARIIDAE)
- kraussianus, Nassarius kraussianus (R.W. Dunker, 1846) - (NASSARIIDAE)
- Kraussi-group, syn of: Genus Pseudotorinia F. Sacco, 1892 (ARCHITECTONICIDAE)
- kraussii, Arca kraussii C.F.F. von Krauss, 1848 - syn of: Arca patriarchalis P.F. Röding, 1798 - (ARCIDAE)
- kraussii, Clionella kraussii (E.A. Smith, 1877) - (CLAVATULIDAE)
- kraussii, Anachis kraussii (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- kraussii, Dreissena kraussii H.C. Küster, 1841 - syn of: Septifer bilocularis (C. Linnaeus, 1758) - (DREISSENIDAE)
- kraussii, Vitrella kraussii C.D. Weinland, 1883 - syn of: Bythiospeum clessini (C.D. Weinland, 1883) - (HYDROBIIDAE)
- kraussii, Septifer kraussii H.C. Küster, 1841 - syn of: Septifer bilocularis (C. Linnaeus, 1758) - (MYTILIDAE)
- kraussii, Patella kraussii R.W. Dunker, 1853 - syn of: Cymbula safiana (J.B.P.A. Lamarck, 1819) - (PATELLIDAE)
- kraussii, Atrina kraussii S.C.T. Hanley, 1858 - syn of: Atrina squamifera (G.B. Sowerby, 1835) - (PINNIDAE)
- kraussii, Gyraulus kraussii E. Klein, 1846 - syn of: Gyraulus steinheimensis (F.M. Hilgendorf, 1867 ) - (PLANORBIDAE)
- kraussii, Clanculus kraussii (R.A. Philippi, 1846) - (TROCHIDAE)
- kraussii, Unio kraussii I. Lea, 1853 - syn of: Castaliella sulcata (C.F.F. von Krauss, 1849) - (UNIONIDAE)
- kraussii, Dosinia kraussii A. Römer, 1862 - syn of: Dosinia subrosea (J.E. Gray, 1835) - (VENERIDAE)
- kraussii alfredensis, Anachis kraussii alfredensis (P. Bartsch, 1915) - (COLUMBELLIDAE)
- kraussii fulgurans, Anachis kraussii fulgurans (C.F.F. von Krauss, 1848) - (COLUMBELLIDAE)
- kraussii io, Anachis kraussii io P. Bartsch, 1915 - syn of: Anachis kraussii (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- kraussii kitchingi, Anachis kraussii kitchingi (G.B. III Sowerby, 1844) - (COLUMBELLIDAE)
- krawczynski, Erratothilda krawczynski A. Kaim, 2004 † - (MATHILDIDAE) (FOSSIL)
- krawczynskii, Nodospira krawczynskii Heidelberger & al., 2009 † - (GOSSELETINIDAE) (FOSSIL)
- krawczynskii, Balbinipleura krawczynskii Frýda & Blodgett, 2004 † - (GOSSELETINIDAE) (FOSSIL)
- krebsi, Martesia krebsi H.J. Krebs, 1864 - syn of: Martesia cuneiformis (T. Say, 1822) - (PHOLADIDAE)
- krebsi, Cymatium krebsi (O.A.L. Mörch, 1877) - syn of: Monoplex krebsii O.A.L. Mörch, 1877 - (RANELLIDAE)
- Krebsia, syn of: Genus Hipponix J.L.M. Defrance, 1819 (HIPPONICIDAE)
- krebsiana, Varicorbula krebsiana (C.B. Adams, 1852) - (CORBULIDAE)
- krebsianus, Bulimulus krebsianus H.A. Pilsbry, 1897 - (BULIMULIDAE)
- krebsii, Psilaxis krebsii (O.A.L. Mörch, 1875) - (ARCHITECTONICIDAE)
- krebsii, syn of: Genus Psilaxis W.P. Woodring, 1928 (ARCHITECTONICIDAE)
- krebsii, Bulla krebsii W.H. Dall, 1889 - (BULLIDAE)
- krebsii, Cylichna krebsii O.A.L. Mörch, 1875 - (CYLICHNIDAE)
- krebsii, Dendrodoris krebsii (O.A.L. Mörch, 1863) - (DENDRODORIDIDAE)
- krebsii, Epitonium krebsii (O.A.L. Mörch, 1875) - (EPITONIIDAE)
- krebsii, Epitonium krebsii O.A.L. Mörch, 1875 - syn of: Epitonium krebsii (O.A.L. Mörch, 1875) - (EPITONIIDAE)
- krebsii, Modulus krebsii O.A.L. Mörch, 1876 - syn of: Modulus modulus (C. Linnaeus, 1758) - (MODULIDAE)
- krebsii, Turbonilla krebsii (O.A.L. Mörch, 1875) - (PYRAMIDELLIDAE)
- krebsii, Monoplex krebsii O.A.L. Mörch, 1877 - (RANELLIDAE)
- krebsii, Rissoina krebsii (O.A.L. Mörch, 1876) - (RISSOINIDAE)
- krebsii, Williamia krebsii (O.A.L. Mörch, 1877) - (SIPHONARIIDAE)
- krebsii, Piliscus krebsii O.A.L. Mörch, 1877 - syn of: Williamia krebsii (O.A.L. Mörch, 1877) - (VELUTINIDAE)
- kreffti, Helicarion kreffti J.C. Cox, 1864 - (HELICARIONIDAE)
- kreffti, Odostomia kreffti G.F. Angas, 1867 - (PYRAMIDELLIDAE)
- krefti, Macrochlamys krefti J.C. Cox - (ARIOPHANTIDAE)
- kreftii, Placostylus kreftii (J.C. Cox, 1872) - (BOTHRIEMBRYONTIDAE)
- kreglingeri, Albinaria caerulea kreglingeri (L. Pfeiffer, 1866) - (CLAUSILIIDAE)
- kreipli, Cassis kreipli H. Morrison, 2003 - (CASSIDAE)
- kreipli, Collonista kreipli G.T. Poppe, S.P. Tagaro & P. Stahlschmidt, 2015 - (COLLONIIDAE)
- kreipli, Bolma kreipli A. Alf, P. Maestrati & P. Bouchet, 2010 - (TURBINIDAE)
- kreipli, Paphia kreipli M. Huber, 2010 - (VENERIDAE)
- kreisslorum, Belgrandiella kreisslorum P.L. Reischütz, 1997 - (HYDROBIIDAE)
- kreitneri, Neoschizodus kreitneri Loczy, 1899 † - (MYOPHORIIDAE) (FOSSIL)
- kreitneri, Fenouilia kreitneri (M. von Neumayr, 1880) - (POMATIOPSIDAE)
- krejcii, Cryptozona chrysoraphe krejcii F. Haas - (ARIOPHANTIDAE)
- krejcii, Pseudobuliminus krejcii A. Zilch, 1938 - (BRADYBAENIDAE)
- krejcii, Euphaedusa krejcii H. Nordsieck, 2001 - (CLAUSILIIDAE)
- krejcii, Pyrgula krejcii W.A. Wenz in Krejci-Graf & W.A. Wenz, 1932 † - (HYDROBIIDAE) (FOSSIL)
- krejcii, Janthina krejcii Beu, 2017 † - (JANTHINIDAE) (FOSSIL)
- krekeleri, Boehmoceras krekeleri (Wegner, 1905 †) - (BACULITIDAE) (FOSSIL)
- kremekense, Trilemma kremekense Blagovetshenskiy & Shumilkin, 2012 † - syn of: Trilemma kremenkense Blagovetshenskiy & Shumilkin, 2012 † - (APORRHAIDAE) (FOSSIL)
- kremenae, Microcystis kremenae K.C. Emberton, 1994 - (EUCONULIDAE)
- kremenensis, Alinda atanasovi kremenensis I. Dedov, 2009 - (CLAUSILIIDAE)
- kremenkense, Trilemma kremenkense Blagovetshenskiy & Shumilkin, 2012 † - (APORRHAIDAE) (FOSSIL)
- kremerae, Nodicostellaria kremerae E.J. Petuch, 1987 - (COSTELLARIIDAE)
- kremeri, Formosana kremeri Grego & Szekeres, 2017 - (CLAUSILIIDAE)
- kremerorum, Conasprelloides kremerorum (E.J. Petuch, 1988) - (CONIDAE)
- kremerorum, Oliva irisans kremerorum E.J. Petuch & D.M. Sargent, 1986 - (OLIVIDAE)
- kremeshkense, Biarmiceras kremeshkense Leonova & al., 2005 † - (MONGOLOCERATIDAE) (FOSSIL)
- kremeshkense, Nemdoceras kremeshkense I.S. Barskov & Shilovsky, 2014 † - (PERMONAUTILIDAE) (FOSSIL)
- kremmeldorfensis, Jurilda kremmeldorfensis J. Gründel, 2014 † - (MATHILDIDAE) (FOSSIL)
- krempfi, Sepioteuthis krempfi C.W. Robson, 1928 - syn of: Sepioteuthis lessoniana R.P. Lesson, 1830 - (LOLIGINIDAE)
- krempfi, Phyllidiopsis krempfi A. Pruvot-Fol, 1957 - (PHYLLIDIIDAE)
- krempfi, Pyrgulina krempfi E. Saurin, 1959 - (PYRAMIDELLIDAE)
- krenkeli, Toxoceratoides krenkeli Förster, 1975 † - (ANCYLOCERATIDAE) (FOSSIL)
- krenkeli, Astarte krenkeli Dietrich, 1933 † - syn of: Eoseebachia sowerbyana (Holdhaus, 1913 †) - (ASTARTIDAE) (FOSSIL)
- krenkeli, Crioceratites krenkeli Sarkar, 1955 † - (CRIOCERATITIDAE) (FOSSIL)
- krenkeli, Eocallista krenkeli Cox, 1935 † - (CYRENIDAE) (FOSSIL)
- krenkeli, Pseudaganides krenkeli Jeannet, 1951 † - (PSEUDONAUTILIDAE) (FOSSIL)
- krenkeli, Linatella krenkeli Cox, 1930 - syn of: Linatella caudata (J.F. Gmelin, 1791) - (RANELLIDAE)
- krenkeli, Zulutrigonia krenkeli (Lange, 1914) † - (RUTITRIGONIIDAE) (FOSSIL)
- kressae, Runcina kressae R.L. Schmekel & D. Cappellato, 2001 - (RUNCINIDAE)
- krestovnikovi, Homoctenus krestovnikovi Lyashenko, 1957 † - (HOMOCTENIDAE) (FOSSIL)
- krestovnikovi, Surenites krestovnikovi Ruzhentsev & Bogoslovskaya, 1975 † - (RETICULOCERATIDAE) (FOSSIL)
- kreter, Kreterostephanus kreter Buckman † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Kreterostephanus, Genus Kreterostephanus Buckman, 1927 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- kreukelorum, Cerithium kreukelorum Gemert, 2012 - (CERITHIIDAE)
- kreuslerae, Notovoluta kreuslerae (G.F. Angas, 1865) - (VOLUTIDAE)
- kreuslerae clarksonii, Notovoluta kreuslerae clarksonii (G.F. Angas, 1865) - (VOLUTIDAE)
- kreuslerae occulta, Notovoluta kreuslerae occulta T.A. Darragh, 1988 † - (VOLUTIDAE) (FOSSIL)
- kreutzii, Stagnicola kreutzii (Lomnicki, 1886 †) - (LYMNAEIDAE) (FOSSIL)
- kribiensis, Fusiturris kribiensis L. Bozzetti, 2015 - syn of: Tomellana hupferi (H. Strebel, 1912) - (CLAVATULIDAE)
- kribiensis, Volvarina kribiensis T. Cossignani & G. Prelle, 2010 - (MARGINELLIDAE)
- kriegerbartholdi, Stellaria kriegerbartholdi C. Nielsen & DeVries, 2002 † - (XENOPHORIDAE) (FOSSIL)
- kriegeri, Chondropoma gnote kriegeri P. Bartsch, 1946 - (POMATIIDAE)
- kriegeri, Abbottella moreletiana kriegeri P. Bartsch, 1946 - (POMATIIDAE)
- kriegeri, Holospira kriegeri M. Drake, 1950 - (UROCOPTIDAE)
- krigei, Exilia krigei (R.N. Kilburn, 1971) - (PTYCHATRACTIDAE)
- krimholzi, Hibolithes krimholzi (Stoyanova-Vergilova, 1970 †) - (MESOHIBOLITHIDAE) (FOSSIL)
- krisbergi, Cerithiopsis krisbergi E. Rolán & R. Fernández-Garcés, 2007 - (CERITHIOPSIDAE)
- krishna, Chromodoris krishna W.B. Rudman, 1973 - syn of: Goniobranchus fidelis (E.F. Kelaart, 1858) - (CHROMODORIDIDAE)
- krishna, Melanella krishna M. Yokoyama, 1920 - (EULIMIDAE)
- krishnaea, Corbicula krishnaea H.C. Ray, 1967 - (CYRENIDAE)
- krishtofovichae, Barbatia krishtofovichae Devjatilova, 1981 † - (ARCIDAE) (FOSSIL)
- krishtofovichae, Mytilus krishtofovichae Devjatilova, 1981 † - (MYTILIDAE) (FOSSIL)
- krishtofovichi, Solena krishtofovichi V.N. Sinelnikova, 1991 † - (SOLENIDAE) (FOSSIL)
- krishtofovitchi, Musculus krishtofovitchi Krishtofovitch, 1964 † - (MYTILIDAE) (FOSSIL)
- kristelleae, Carinastele kristelleae B.A. Marshall, 1988 - (CALLIOSTOMATIDAE)
- kristenseni, Acteocina kristenseni D. De Jong & H.E. Coomans, 1988 - (ACTEOCINIDAE)
- kristenseni, Decipifus kristenseni D. De Jong & H.E. Coomans, 1988 - (COLUMBELLIDAE)
- kristenseni, Noumeaella kristenseni (Er. Marcus & Ev. Marcus, 1963) - (FACELINIDAE)
- kristenseni, Palisa kristenseni Er. Marcus & Ev. Marcus, 1963 - syn of: Noumeaella kristenseni (Er. Marcus & Ev. Marcus, 1963) - (FACELINIDAE)
- kristianiensis, Kiaeromphalus kristianiensis Peel & E.L. Yochelson, 1976 † - (EUOMPHALIDAE) (FOSSIL)
- kristinae, Tylomelania kristinae T. von Rintelen, P. Bouchet & M. Glaubrecht, 2007 - (PACHYCHILIDAE)
- kritscheri, Monoplex kritscheri M. Harzhauser, 2014 † - (RANELLIDAE) (FOSSIL)
- krivolukense, Protocycloceras krivolukense Balaschov, 1962 † - syn of: Tofangoceras pauciannulatum T. Kobayashi, 1928 † - (PROTOCYCLOCERATIDAE) (FOSSIL)
- krizanici, Emmericia krizanici Š. Brusina, 1902 † - (AMNICOLIDAE) (FOSSIL)
- krizensis, Cernuella krizensis J.R. Bourguignat, 1887 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- krizi, Spinicharybdis krizi Rohr & al., 2008 † - (EUOMPHALIDAE) (FOSSIL)
- kriziana, Drahomira kriziana Horný, 2005 † - (TRYBLIDIIDAE) (FOSSIL)
- krkae, Hadziella krkae J. Bole, 1992 - (HYDROBIIDAE)
- Krobylos, Genus Krobylos Panha & Burch, 1999 (HYPSELOSTOMATIDAE)
- kroensis, Anadara kroensis Boettger, 1883 † - (ARCIDAE) (FOSSIL)
- kroeyeri, Plicifusus kroeyeri (H.P.C. Møller, 1842) - (BUCCINIDAE)
- kroeyeri, Colus kroeyeri H.P.C. Møller, 1842 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (BUCCINIDAE)
- kroeyeri, Plicifusus kroeyeri H.P.C. Møller, 1842 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (BUCCINIDAE)
- kroeyeri, Neoiphinoe kroeyeri (R.A. Philippi, 1849) - (CAPULIDAE)
- kroeyeri, Fusus kroeyeri H.P.C. Møller, 1842 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (FASCIOLARIIDAE)
- kroeyeri, Cyclinella kroeyeri (R.A. Philippi, 1847) - (VENERIDAE)
- kroeyeri, Phyllocaulis kroeyeri C.G. Semper, 1885 - syn of: Phyllocaulis soleiformis (A.V.M.D. D'Orbigny, 1835) - (VERONICELLIDAE)
- kroeyeri grossestriata, Plicifusus kroeyeri grossestriata C.W.S. Aurivillius, 1885 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (BUCCINIDAE)
- kroeyeri grossestriata, Fusus kroeyeri grossestriata C.W.S. Aurivillius, 1885 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (FASCIOLARIIDAE)
- kroeyeri major, Fusus kroeyeri major O.A.L. Mörch, 1869 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (FASCIOLARIIDAE)
- kroeyeri pumila, Fusus kroeyeri pumila O.A.L. Mörch, 1869 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (FASCIOLARIIDAE)
- kroeyeri ulloana, Cyclinella kroeyeri ulloana L.G. Hertlein & A.M. Strong, 1948 - syn of: Cyclinella subquadrata (S.C.T. Hanley, 1844) - (VENERIDAE)
- krohi, Gyraulus krohi T.A. Neubauer & M. Harzhauser, 2014 - (PLANORBIDAE)
- krohi, Solariella krohi M. Harzhauser, 2007 † - (SOLARIELLIDAE) (FOSSIL)
- krohni, Felimida krohni (J.B. Vérany, 1846) - (CHROMODORIDIDAE)
- krohni, Chromodoris krohni J.B. Vérany, 1846 - syn of: Felimida krohni (J.B. Vérany, 1846) - (CHROMODORIDIDAE)
- krohni, Doris krohni J.B. Vérany, 1846 - syn of: Felimida krohni (J.B. Vérany, 1846) - (DORIDIDAE)
- krohnii, Cliopsis krohnii F.H. Troschel, 1854 - (CLIOPSIDAE)
- krohnii, Onychoteuthis krohnii J.B. Vérany, 1847 - (ONYCHOTEUTHIDAE)
- krohnii, Onychoteuthis krohnii J.E. Gray, 1849 - syn of: Onychoteuthis banksii (W.E. Leach, 1817) - (ONYCHOTEUTHIDAE)
- krohnii grandis, Cliopsis krohnii grandis J.E.V. Boas, 1886 - (CLIOPSIDAE)
- kroisbachensis, Solariella kroisbachensis F. Traub, 1979 † - (SOLARIELLIDAE) (FOSSIL)
- Krolmusium, Genus Krolmusium Hornύ, 2002 (PORCELLIIDAE) (FOSSIL)
- kromi, Odostomia kromi J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984 - (PYRAMIDELLIDAE)
- kronei, Speironepion kronei (H.F.A. von Ihering, 1901) - (STROPHOCHEILIDAE)
- kronenbergi, Belonimorphis kronenbergi M. Harzhauser, 2014 † - (CERITHIOPSIDAE) (FOSSIL)
- kronenbergi, Acesta kronenbergi N.N. Thach, 2015 - (LIMIDAE)
- kronenbergi, Trabecula kronenbergi (J.J. Van Aartsen, E. Gittenberger & J. Goud, 2000) - (PYRAMIDELLIDAE)
- kronenbergi, Chrysallida kronenbergi J.J. Van Aartsen, E. Gittenberger & J. Goud, 2000 - syn of: Trabecula kronenbergi (J.J. Van Aartsen, E. Gittenberger & J. Goud, 2000) - (PYRAMIDELLIDAE)
- kronenbergi, Persististrombus kronenbergi M. Harzhauser, 2009 † - (STROMBIDAE) (FOSSIL)
- kronenbergi, Terebra kronenbergi B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (TEREBRIDAE) (FOSSIL)
- kronokiense, Propeamussium kronokiense (Pronina, 1969 †) - (PROPEAMUSSIIDAE) (FOSSIL)
- kronokiensis, Cardiomya kronokiensis Pronina, 1969 † - (CUSPIDARIIDAE) (FOSSIL)
- kronzwilmesorum, Bathrotomaria kronzwilmesorum Gatto & al., 2015 † - (PLEUROTOMARIIDAE) (FOSSIL)
- kroombit, Pedinogyra kroombit J. Stanisic, 2010 - (CARYODIDAE)
- kroteri, Trophon kroteri H.P.C. Møller, 1842 - (MURICIDAE)
- krotovi, Palaeostylus krotovi Mazaev, 2015 † - (PALAEOSTYLIDAE) (FOSSIL)
- krotowi, Crimites krotowi (Karpinsky, 1889 †) - (ADRIANITIDAE) (FOSSIL)
- krotowi, Agathiceras krotowi Karpinsky, 1889 † - syn of: Crimites krotowi (Karpinsky, 1889 †) - (AGATHICERATIDAE) (FOSSIL)
- krotowi, Limatulina krotowi Stuckenberg, 1898 † - syn of: Palaeolima krotowi (Stuckenberg, 1898 †) - (LIMATULINIDAE) (FOSSIL)
- krotowi, Palaeolima krotowi (Stuckenberg, 1898 †) - (LIMIDAE) (FOSSIL)
- krotowi, Lima krotowi Mark, 1912 † - syn of: Palaeolima triplistriata (Stevens, 1858 †) - (LIMIDAE) (FOSSIL)
- krotowi, Palaeomutela krotowi Netschajew, 1894 † - (PALAEOMUTELIDAE) (FOSSIL)
- krotowi, Bitaunioceras krotowi Dewingthal, 1951 † - (SPYROCERATIDAE) (FOSSIL)
- krousma, Cirsotrema krousma R.N. Kilburn, 1985 - (EPITONIIDAE)
- kroyeri, Colus kroyeri H.P.C. Møller, 1842 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (BUCCINIDAE)
- kroyeri, Plicifusus kroyeri H.P.C. Møller, 1842 - syn of: Plicifusus kroeyeri (H.P.C. Møller, 1842) - (BUCCINIDAE)
- kroyeri, Iphinopsis kroyeri R.A. Philippi, 1849 - syn of: Neoiphinoe kroeyeri (R.A. Philippi, 1849) - (CANCELLARIIDAE)
- kroyeri, Trichotropis kroyeri R.A. Philippi, 1849 - syn of: Neoiphinoe kroeyeri (R.A. Philippi, 1849) - (CAPULIDAE)
- kroyeri ulloana, Cyclinella kroyeri ulloana L.G. Hertlein & A.M. Strong, 1948 - syn of: Cyclinella subquadrata (S.C.T. Hanley, 1844) - (VENERIDAE)
- krueperi, Granopupa krueperi C.A. Westerlund, 1894 - syn of: Granopupa granum (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- krueperi, Albinaria krueperi (L. Pfeiffer, 1866) - (CLAUSILIIDAE)
- krueperi, Helicigona krueperi (O. Böttger, 1891) - (HELICIDAE)
- krueperi, Helix krueperi W. Kobelt, 1906 - syn of: Helix pomatia C. Linnaeus, 1758 - (HELICIDAE)
- krueperi dissipata, Albinaria krueperi dissipata (O. Böttger, 1878) - (CLAUSILIIDAE)
- krueperi holostoma, Albinaria krueperi holostoma (O. Böttger, 1883) - (CLAUSILIIDAE)
- krugi, Indigirites krugi (A.M. Popov, 1946 †) - (NATHORSTITIDAE) (FOSSIL)
- kruglovi, Aktastioceras kruglovi Shimanskiy, 1948 † - (PARABACTRITIDAE) (FOSSIL)
- kruglovi, Permonautilus kruglovi I.S. Barskov & Shilovsky, 2014 † - (PERMONAUTILIDAE) (FOSSIL)
- kruglovi, Euglesa kruglovi F. Zatrawkin, 1987 - syn of: Pisidium khurbaense (F. Zatrawkin, 1987) - (SPHAERIIDAE)
- kruglovi, Metacoceras kruglovi Ruzhentsev & Shimanskiy, 1954 † - (TAINOCERATIDAE) (FOSSIL)
- kruglowiae, Anisus kruglowiae (A.C.J. Johansen, 1937) - (PLANORBIDAE)
- kruijti, Amphidromus kruijti P.B. Sarasin & K.F. Sarasin, 1899 - (CAMAENIDAE)
- kruimeli, Tylomelania kruimeli T. von Rintelen & M. Glaubrecht, 2003 - (PACHYCHILIDAE)
- kruizingai, Nassarius kruizingai C.H. Oostingh, 1939 † - (NASSARIIDAE) (FOSSIL)
- krumbecki, Burmesia krumbecki C. Chen, 1961 † - (BURMESIIDAE) (FOSSIL)
- krumbecki, Tricarilda krumbecki (Kuhn, 1935 †) - (MATHILDIDAE) (FOSSIL)
- Krumbeckia, syn of: Genus Trolliceras Torrens, 1971 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Krumbeckia, Genus Krumbeckia Diener, 1915 (HIPPURITIDA (UNASSIGNED)) (FOSSIL)
- Krumbeckiella, Genus Krumbeckiella Ichikawa, 1958 (PERGAMIDIIDAE) (FOSSIL)
- krumensis, Pseudamnicola krumensis P. Glöer, J. Grego, Z. Eröss & Z. Fehér, 2015 - (HYDROBIIDAE)
- krumpermani, Trabecula krumpermani (D. De Jong & H.E. Coomans, 1988) - (PYRAMIDELLIDAE)
- krungtepensis, Morrisonietta krungtepensis R.A.M. Brandt, 1968 - (PYRAMIDELLIDAE)
- krungtepensis, Stenothyra krungtepensis R.A.M. Brandt, 1968 - (STENOTHYRIDAE)
- krupensis, Belgrandiella krupensis P. Radoman, 1973 - (HYDROBIIDAE)
- Kruppomenia, Genus Kruppomenia H.F. Nierstrasz, 1903 (SIMROTHIELLIDAE)
- krusadaiae, Petalifera krusadaiae O'Donoghue, 1930 - (APLYSIIDAE)
- krusadalae, Petalifera krusadalae C.H. O'Donoghue, 1930 - (APLYSIIDAE)
- krusati, Umbosporadoceras krusati Becker & al., 2002 † - (SPORADOCERATIDAE) (FOSSIL)
- krusensterni, Solen krusensterni L. von Schrenck, 1867 - (SOLENIDAE)
- krusensternii, Dendrodoris krusensternii (J.E. Gray, 1850) - (DENDRODORIDIDAE)
- krushunica, Devetakia krushunica D.G. Georgiev & P. Glöer, 2011 - (HYDROBIIDAE)
- kruusei, Myophorella kruusei H.A. Leanza & Garate, 1987 † - (MYOPHORELLIDAE) (FOSSIL)
- kruzini, Arctoptychites kruzini Bytschkov, 1976 † - (PTYCHITIDAE) (FOSSIL)
- krybetes, Beddomeia krybetes W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- Krykyloceras, Genus Krykyloceras (NAUTILIDA (UNASSIGNED)) (FOSSIL)
- krylovae, Cuspidaria krylovae J.A. Allen, 2011 - (CUSPIDARIIDAE)
- krylovata, Pliocardia krylovata A.M. Martin & S.K. Goffredi, 2012 - (VESICOMYIDAE)
- Krylovina, Genus Krylovina Valentich-Scott, 2012 (CUSPIDARIIDAE)
- Krynichia, syn of: Genus Deroceras C.S. Rafinesque, 1820 (AGRIOLIMACIDAE)
- Krynickellus, syn of: Genus Deroceras C.S. Rafinesque, 1820 (AGRIOLIMACIDAE)
- Krynickia, syn of: Genus Deroceras C.S. Rafinesque, 1820 (AGRIOLIMACIDAE)
- krynickii, Arion krynickii J. Kaleniczenko, 1851 - syn of: Mesarion subfuscus (J.P.R. Draparnaud, 1805) - (ARIONIDAE)
- krynickii, Helix krynickii Andrzeiewsky in I. Krynicki, 1833 - syn of: Xeropicta krynickii (Andrzeiewsky in I. Krynicki, 1833) - (HELICIDAE)
- krynickii, Xeropicta krynickii (Andrzeiewsky in I. Krynicki, 1833) - (HYGROMIIDAE)
- krynickii, Hyalinia krynickii S. Clessin, 1883 - syn of: Longiphallus deilus (J.R. Bourguignat, 1857) - (ZONITIDAE)
- krynickii odessana, Xerosecta krynickii odessana W.A. Lindholm, 1908 - syn of: Xeropicta krynickii (Andrzeiewsky in I. Krynicki, 1833) - (HYGROMIIDAE)
- Krynickillus, Genus Krynickillus J. Kaleniczenko, 1851 (AGRIOLIMACIDAE)
- krypta, Cupolaconcha krypta (S.M. Gardner, 1989) - (VERMETIDAE)
- Kryptos, Genus Kryptos J.G. Jeffreys in P. Dautzenberg & H. Fischer, 1896 (BUCCINIDAE)
- kryptum, Dendropoma kryptum S.M. Gardner, 1989 - syn of: Cupolaconcha krypta (S.M. Gardner, 1989) - (VERMETIDAE)
- kryshtofovichae, Barbatia kryshtofovichae Devjatilova, 1981 † - syn of: Barbatia krishtofovichae Devjatilova, 1981 † - (ARCIDAE) (FOSSIL)
- kryshtofovichae, Corbicula kryshtofovichae V.N. Sinelnikova, 1997 † - (CYRENIDAE) (FOSSIL)
- kryshtofovichii, Leionucula kryshtofovichii V.N. Sinelnikova, 1990 † - (NUCULIDAE) (FOSSIL)
- kryshtofovichii, Pitar kryshtofovichii V.N. Sinelnikova, 1991 † - (VENERIDAE) (FOSSIL)
- kryshtofovitschi, Musculus kryshtofovitschi Krishtofovitch, 1964 † - syn of: Musculus krishtofovitchi Krishtofovitch, 1964 † - (MYTILIDAE) (FOSSIL)
- kryshtofowichi, Chlamys kryshtofowichi Kiparisova, 1938 † - syn of: Confusionella loczyi (Bittner, 1901 †) - (PECTINIDAE) (FOSSIL)
- krystafoviczi, Crisposcala krystafoviczi Klusznikov, 1958 † - (EPITONIIDAE) (FOSSIL)
- krystofovitschi, Musculus krystofovitschi Krishtofovitch, 1964 † - syn of: Musculus krishtofovitchi Krishtofovitch, 1964 † - (MYTILIDAE) (FOSSIL)
- krystyni, Kasimlarceltites krystyni Lukeneder & Lukeneder, 2014 † - (CELTITIDAE) (FOSSIL)
- krystyni, Inyoites krystyni Brayard & Bucher, 2008 † - (INYOITIDAE) (FOSSIL)
- krystyni, Norosirenites krystyni Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- krystyni, Euisculites krystyni Tozer, 1994 † - (TROPITIDAE) (FOSSIL)
- krystyni, Wopfingites krystyni Wiedmann, 1970 † - (USSURITIDAE) (FOSSIL)
- kseirense, Stenopharciceras kseirense (Petter, 1959 †) - (PHARCICERATIDAE) (FOSSIL)
- kseirense, Pharciceras kseirense Petter, 1959 † - syn of: Stenopharciceras kseirense (Petter, 1959 †) - (PHARCICERATIDAE) (FOSSIL)
- ksibaensis, Loxana ksibaensis J. Ahuir, 2013 - (HELICIDAE)
- ktenasi, Proptychites ktenasi Renz & Renz, 1948 † - syn of: Proptychitoides trigonalis (Arthaber, 1911 †) - (PROPTYCHITIDAE) (FOSSIL)
- kualii, Philonesia kualii H.B. Baker, 1940 - (EUCONULIDAE)
- Kuanchuanella, Genus Kuanchuanella Yue, 1984 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- kuantungensis, Hyolithes kuantungensis Resser & Endo, 1937 † - (HYOLITHIDAE) (FOSSIL)
- kubanica, Hydrobia kubanica Zhizhchenko, 1936 † - (HYDROBIIDAE) (FOSSIL)
- kubanica, Valvata kubanica Krestovnikov, 1931 † - (VALVATIDAE) (FOSSIL)
- kubanicus, Planorbis kubanicus E.V. Soldatenko & Y.I. Starobogatov, 1998 - (PLANORBIDAE)
- kubaryana, Nembrotha kubaryana L.S.R. Bergh, 1877 - (POLYCERIDAE)
- kubaryi, Rhynchotrochus kubaryi O.F. von Möllendorff, 1895 - (CAMAENIDAE)
- kubaryi, Kubaryiellus kubaryi (O.F. von Möllendorff, 1900) - (CHAROPIDAE)
- kubaryi, Cyclophorus kubaryi O.F. von Möllendorff, 1895 - (CYCLOPHORIDAE)
- kubaryi, Palaina kubaryi O.F. von Möllendorff, 1897 - (DIPLOMMATINIDAE)
- Kubaryia, Genus Kubaryia W.J. Clench, 1948 (ASSIMINEIDAE)
- Kubaryiellus, Genus Kubaryiellus G.A. Solem, 1983 (CHAROPIDAE)
- kubinaga, Hemiphaedusa kubinaga (J.T. Kuroda, 1936) - (CLAUSILIIDAE)
- kublai, Antimitrella kublai Lussi, 2017 - (COLUMBELLIDAE)
- kublerensis, Naesiotus kublerensis L.A. Chambers, 1986 - (BULIMULIDAE)
- kubodera, Graneledone taniwha kubodera B.J. O'Shea, 1999 - (OCTOPODIDAE)
- kuboderai, Vasticardium kuboderai N.N. Thach, 2015 - (CARDIIDAE)
- kuboi, Pusia kuboi H. Turner, S. Gori & R. Salisbury, 2007 - (COSTELLARIIDAE)
- kubotai, Bythinella kubotai J.T. Kuroda & T. Habe, 1958 - (BYTHINELLIDAE)
- kubuensis, Plectostoma kubuensis T.S. Liew, J.J. Vermeulen & alias, 2014 - (DIPLOMMATINIDAE)
- kucerai, Rossmaessleria kucerai J. Galindo, 2017 - (HELICIDAE)
- kuckersiana, Schizolopha kuckersiana Teichert, 1932 † - syn of: Lophospira kuckersiana (Teichert, 1932 †) - (GOSSELETINIDAE) (FOSSIL)
- kuckersiana, Lophospira kuckersiana (Teichert, 1932 †) - (LOPHOSPIRIDAE) (FOSSIL)
- kudiensis, Karaftohelix kudiensis (T.D.A. Cockerell, 1924) - (BRADYBAENIDAE)
- kudiensis, Hygromia kudiensis T.D.A. Cockerell, 1924 - (HYGROMIIDAE)
- kudrjavzevi, Argonauticeras kudrjavzevi Drushchitz, 1956 † - (TETRAGONITIDAE) (FOSSIL)
- kuehnelti, Leiosolenus kuehnelti (K.H. Kleemann, 1977) - (MYTILIDAE)
- kuehni, Austroteuthis kuehni Jeletzky & Zapfe, 1967 † - (AULACOCERIDA (UNASSIGNED)) (FOSSIL)
- kuehni, Amphidromus kuehni O.F. von Möllendorff, 1902 - (CAMAENIDAE)
- kuehni, Mayesella kuehni (G. Müller, 1900) † - (IOTRIGONIIDAE) (FOSSIL)
- Kuehnia, Genus Kuehnia Milovanovic, 1956 (RADIOLITIDAE) (FOSSIL)
- kuehschelmi, Palaeocyclotus kuehschelmi M. Harzhauser & T.A. Neubauer, 2016 † - (POMATIIDAE) (FOSSIL)
- kueichowense, Popanoceras kueichowense (Chao, 1965 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- kueichowense, Propopanoceras kueichowense Chao, 1965 † - syn of: Popanoceras kueichowense (Chao, 1965 †) - (POPANOCERATIDAE) (FOSSIL)
- kueichowensis, Syngastrioceras kueichowensis (Yin, 1935 †) - (GLAPHYRITIDAE) (FOSSIL)
- kueichowensis, Japonites kueichowensis Hsu, 1937 † - (GYMNITIDAE) (FOSSIL)
- kuekenthali, Raphaulus kuekenthali W. Kobelt, 1897 - (PUPINIDAE)
- kuemeli, Tornus kuemeli M. Harzhauser, 2002 † - (TORNIDAE) (FOSSIL)
- kuemmeli, Granocardium kuemmeli Weller, 1907 † - syn of: Granocardium kummeli (Weller, 1907 †) - (CARDIIDAE) (FOSSIL)
- kuemmeli, Gabbigonia kuemmeli (Weller, 1907) † - (PTEROTRIGONIIDAE) (FOSSIL)
- kueneni, Hinia kueneni E.J. Koperberg, 1931 - syn of: Nassarius crematus R.B. Hinds, 1844 - (NASSARIIDAE)
- kuenowii, Vertigo kuenowii Klebs, 1886 † - (VERTIGINIDAE) (FOSSIL)
- kueprijae, Laciniaria plicata kueprijae H. Nordsieck - (CLAUSILIIDAE)
- kuesi, Takfaia kuesi A. Nützel & Ketwetsuriya, 2016 † - (EOTOMARIIDAE) (FOSSIL)
- kuesi, Baylea kuesi Batten, 1995 † - (GOSSELETINIDAE) (FOSSIL)
- kuesteri, Auriculella kuesteri L. Pfeiffer, 1855 - (ACHATINELLIDAE)
- kuesteri, Phalium kuesteri F.M. Bayer, 1935 - syn of: Phalium flammiferum (P.F. Röding, 1798) - (CASSIDAE)
- kuesteri, Cochlodina kuesteri E.A. Rossmässler, 1836 - (CLAUSILIIDAE)
- kuesteri, Heleobia kuesteri (P. von Ströbel, 1874) - (COCHLIOPIDAE)
- kuesteri, Melampus kuesteri C.F.F. von Krauss in H.C. Küster, 1843 - syn of: Melampus lividus (G.P. Deshayes, 1830) - (ELLOBIIDAE)
- kuesteri, Belgrandiella kuesteri (H.D. Boeters, 1970) - (HYDROBIIDAE)
- kuesteri, Helicella kuesteri F. Held - syn of: Helicella itala (C. Linnaeus, 1758) - (HYGROMIIDAE)
- kuesteri, Nassa kuesteri C.F.F. von Krauss, 1848 - syn of: Nassarius kraussianus (R.W. Dunker, 1846) - (NASSARIIDAE)
- kuesteri, Trochomorpha kuesteri (L. Pfeiffer) - (TROCHOMORPHIDAE)
- kuesteri sassariensis, Cochlodina kuesteri sassariensis H. Nordsieck, 1969 - (CLAUSILIIDAE)
- kuesteriana, Vertigo kuesteriana C.A. Westerlund, 1874 - syn of: Vertigo moulinsiana (D. Dupuy, 1849) - (VERTIGINIDAE)
- kuesterianus, Hexaplex kuesterianus C.M. Tapparone-Canefri, 1875 - syn of: Hexaplex kusterianus (C.M. Tapparone-Canefri, 1875) - (MURICIDAE)
- Kuesteriella, syn of: Genus Idyla H. Adams & A. Adams, 1855 (CLAUSILIIDAE)
- Kufengoceras, Genus Kufengoceras Ruzhencev , 1956 (CYCLOLOBIDAE) (FOSSIL)
- Kufralaria, Genus Kufralaria Termier & Termier, 1980 (NUCULIDA (UNASSIGNED)) (FOSSIL)
- kugarchense, Bashkortoceras kugarchense Ruzhentsev & Bogoslovskaya, 1971 † - (HOMOCERATIDAE) (FOSSIL)
- Kugeloceras, Genus Kugeloceras Flower, 1968 (ENDOCERIDA (UNASSIGNED)) (FOSSIL)
- Kugitangia, Genus Kugitangia Schileyko, Pazilov & Abdulazizova, 2017 (BRADYBAENIDAE)
- kugleri, Bostryx kugleri L. Forcart, 1954 - (BULIMULIDAE)
- kugleri, Cimomia kugleri Miller, 1947 † - (HERCOGLOSSIDAE) (FOSSIL)
- kugleri, Eupleura kugleri P.O. Jung, 1965 † - (MURICIDAE) (FOSSIL)
- kugleri, Murex kugleri W.J. Clench & I. Pérez Farfante, 1945 - syn of: Siratus cailleti (S.A.A. Petit De La Saussaye, 1856) - (MURICIDAE)
- kugleri, Nassarius kugleri B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (NASSARIIDAE) (FOSSIL)
- kugleri, Tudora williamsoni kugleri L. Forcart - (POMATIIDAE)
- kugleri, Knefastia kugleri P.O. Jung, 1965 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- kugleri, Ranularia kugleri Rustch, 1942 - syn of: Monoplex lignarius W.J. Broderip, 1833 - (RANELLIDAE)
- kugleri, Valvata kugleri L. Forcart, 1948 - (VALVATIDAE)
- Kugleria, Genus Kugleria Bouwman, 1938 (REQUIENIIDAE) (FOSSIL)
- kugyoi, Turbonilla kugyoi (S. Nomura, 1938) - (PYRAMIDELLIDAE)
- kugyoi, Chemnitzia kugyoi S. Nomura, 1938 - syn of: Turbonilla kugyoi (S. Nomura, 1938) - (PYRAMIDELLIDAE)
- kuharanus, Hemiprionites kuharanus (Yehara, 1927 †) - (PRIONITIDAE) (FOSSIL)
- kuhnerianus, Planorbis kuhnerianus S. Clessin, 1883 - syn of: Biomphalaria kuhniana (S. Clessin, 1883) - (PLANORBIDAE)
- kuhnholtzi, Annachlamys kuhnholtzi (A.C. Bernardi, 1860) - (PECTINIDAE)
- kuhnholtzianus, Odontostomus kuhnholtzianus (J.C.H. Crosse, 1870) - (ODONTOSTOMIDAE)
- kuhni, Succinea kuhni C.M.F. Ancey - (SUCCINEIDAE)
- kuhniama, Biomphalaria kuhniama (S. Clessin, 1883) - (PLANORBIDAE)
- kuhniana, Biomphalaria kuhniana (S. Clessin, 1883) - (PLANORBIDAE)
- kuhnpassetensis, Nipponothracia kuhnpassetensis (Kelly & al. 2000) † - (LUCINIDAE) (FOSSIL)
- kuhnsi, Perdicella kuhnsi H.A. Pilsbry, 1912 - (ACHATINELLIDAE)
- kuhnsi, Laminella kuhnsi C.M. Cooke, 1908 - (AMASTRIDAE)
- kuhnsi, Atys kuhnsi H.A. Pilsbry, 1917 - syn of: Atys naucum (C. Linnaeus, 1758) - (HAMINOEIDAE)
- kuhnsi, Alcyna kuhnsi H.A. Pilsbry, 1917 - syn of: Alcyna ocellata (A. Adams, 1860) - (TROCHIDAE)
- kuhnsi humerosa, Alcyna kuhnsi humerosa H.A. Pilsbry, 1917 - syn of: Alcyna ocellata (A. Adams, 1860) - (TROCHIDAE)
- kuhnsii, Succinea kuhnsii C.M.F. Ancey, 1904 - (SUCCINEIDAE)
- Kuia, Genus Kuia Marwick, 1927 (VENERIDAE) (FOSSIL)
- kuilukensis, Eurites kuilukensis Konovalova, 2015 † - (MUENSTEROCERATIDAE) (FOSSIL)
- kuiperi, Sitala kuiperi E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1994 - (ARIOPHANTIDAE)
- kuiperi, Seila kuiperi E. Rolán & J. Pelorce, 2006 - (CERITHIOPSIDAE)
- kuiperi, Pseudolilliconus kuiperi (R.G. Moolenbeek, 2006) - (CONIDAE)
- kuiperi, Vexillum kuiperi H. Turner, 2006 - (COSTELLARIIDAE)
- kuiperi, Palacanthilhiopsis kuiperi H. Girardi, 2009 - (HYDROBIIDAE)
- kuiperi, Suboestophora kuiperi L. Gasull, 1966 - syn of: Oestophora boscae (J.G. Hidalgo, 1869) - (HYGROMIIDAE)
- kuiperi, Spiralix kuiperi H.D. Boeters & G. Falkner, 2009 - (MOITESSIERIIDAE)
- kuiperi, Odostomia kuiperi J.J. Van Aartsen, E. Gittenberger & J. Goud, 1998 - (PYRAMIDELLIDAE)
- kuiperi, Setia kuiperi (A. Verduin, 1984) - (RISSOIDAE)
- kuiperi, Pisidium kuiperi S.P. Dance, 1967 - (SPHAERIIDAE)
- kuiperi, Galileja kuiperi Y.I. Starobogatov & E.A. Streletzkaja, 1967 - syn of: Pisidium hibernicum C.A. Westerlund, 1894 - (SPHAERIIDAE)
- kuiperi, Gulella kuiperi A.J. de Winter, 2007 - (STREPTAXIDAE)
- kuiperi, Dosinia kuiperi E. Fischer-Piette & D. Delmas, 1967 - (VENERIDAE)
- Kuiperipisidium, syn of: Genus Pisidium L. Pfeiffer, 1821 (SPHAERIIDAE)
- kuiteri, Chromodoris kuiteri W.B. Rudman, 1982 - (CHROMODORIDIDAE)
- kuiteri, Cuthona kuiteri W.B. Rudman, 1981 - (FIONIDAE)
- kuitrorum, Cuthona kuitrorum (W.B. Rudman, 1981) - (FIONIDAE)
- kujalnicus, Valenciennius kujalnicus Taktakishvili, 1962 † - (LYMNAEIDAE) (FOSSIL)
- kujavcensis, Viviparus kujavcensis Popovic, 1971 † - (VIVIPARIDAE) (FOSSIL)
- kujianus, Colus kujianus R. Tiba, 1973 - (BUCCINIDAE)
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