-
Yoldiella abyssicola
(J. Knudsen, 1970)
-
Yoldiella abyssorum
J. Knudsen, 1970
-
Portlandia aestuariorum
(Mosevich, 1928)
-
Yoldiella aethiopica
(K.H.J. Thiele & S.G.A. Jaeckel, 1931)
-
Yoldiella alleni
M. Huber, 2010
-
Yoldiella alluaudi
(P. Dautzenberg & H. Fischer, 1897)
-
Yoldia amaninensis
Simonova † (FOSSIL)
-
Yoldiella americana
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia amygdalea
A. Valenciennes, 1846
-
Scissileda anatina
(E.A. Smith, 1896)
-
Yoldiella annenkovae
(G.P. Gorbunov, 1946)
-
Yoldiella antarctica
(K.H.J. Thiele, 1912)
-
Yoldia antiqua
Y.B. Gladenkov, 1994 † (FOSSIL)
-
Yoldiella araribola
N.P. Benaim & R.S. Absalão, 2011
-
Portlandia arctica
(Gray, 1824)
-
Yoldiella ardgowanica
(Powell, 1935 †) (FOSSIL)
-
Yoldiella argentinensis
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella artipica
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia aurata
T.C. Lan & Y.C. Lee, 2001
-
Yoldia bartschi
O.A. Scarlato, 1981
-
Yoldia bella
Berezovsky, 2015 † (FOSSIL)
-
Yoldiella bernardi
(P. Dautzenberg & H. Fischer, 1897)
-
Yoldia (Mirayoldia) bersoni
Pronina, 1973 † (FOSSIL)
-
Yoldiella biguttata
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella bilanta
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia biremis
S. Uozumi, 1957 † (FOSSIL)
-
Yoldiella biscayensis
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella blanda
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia bocasensis
A.A. Olsson, 1922 † (FOSSIL)
-
Yoldiella cadizensis
L. Hoffman, B. van Heugten & M.S.S. Lavaleye, 2009
-
Yoldia callista
K.J. Bush, 1893
-
Yoldiella capensis
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella capsa
(W.H. Dall, 1916)
-
Adranella casta
(A.E. Verrill & K.J. Bush, 1898)
-
Yoldia caudata
Khomenko, 1973 † (FOSSIL)
-
Yoldiella cecinella
(W.H. Dall, 1916)
-
Yoldia chejsliensis
Y.B. Gladenkov, 1990 † (FOSSIL)
-
Yoldiella chilenica
(W.H. Dall, 1908)
-
Yoldia chojensis
Simonova, 1941 † (FOSSIL)
-
Orthoyoldia claibornensis
(T.A. Conrad, 1848 †) (FOSSIL)
-
Scissileda clara
(J.C. Melvill, 1898)
-
Yoldiella clarkei
J. Knudsen, 1970
-
Yoldia clydaniona
D.T. Dockery, 1982 † (FOSSIL)
-
Yoldia clydoniona
D.T. Dockery, 1982 † (FOSSIL)
-
Scissileda crassicardo
R.N. Kilburn, 1994
-
Orthoyoldia crosbyana
(R.J.L. Guppy, 1882)
-
Portlandia cuneistriata
M. Ichikawa & K. Maeda, 1958 † (FOSSIL)
-
Yoldiella cuniculi
(J. Marwick, 1965 †) (FOSSIL)
-
Yoldia cupressensis
H.D. Russell & Landes, 1937 † (FOSSIL)
-
Yoldiella curta
A.E. Verrill & K.J. Bush, 1898
-
Yoldiella curupira
N.P. Benaim & R.S. Absalão, 2011
-
Yoldiella dautzenbergi
R. La Perna, 2008
-
Portlandia decipiens
E.A. Smith, 1885
-
Yoldia defossata
Quilty & al., 2016 † (FOSSIL)
-
Yoldiella derjugini
O.A. Scarlato, 1981
-
Portlandia deshayesiana
(P. Nyst, 1835 †) (FOSSIL)
-
Yoldiella despecta
(E.A. Smith, 1885)
-
Yoldiella dissimilis
A.E. Verrill & K.J. Bush, 1898
-
Scissileda divaricata
(N.H. Odhner, 1919)
-
Yoldia djakovi
Slodkewitsch, 1938 † (FOSSIL)
-
Yoldia dowlingi
H.D. Russell & Landes, 1937 † (FOSSIL)
-
Yoldia duprei
C.S. Weaver & K.V.W. Palmer, 1922 † (FOSSIL)
-
Yoldiella ecaudata
(J.P.L. Pelseneer, 1903)
-
Yoldia eightsii
(J.C. Jay, 1839)
-
Yoldiella ella
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella enata
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia enemtensis
Y.B. Gladenkov, 1979 † (FOSSIL)
-
Yoldia epilongissima
Y.B. Gladenkov, 1972 † (FOSSIL)
-
Yoldia (Cnesterium) ermanensis
Y.B. Gladenkov, 1976 † (FOSSIL)
-
Yoldia evansi
F.B. Meek & Hayden, 1857 † (FOSSIL)
-
Yoldiella exigua
(K.H.J. Thiele & S.G.A. Jaeckel, 1931)
-
Yoldiella expansa
(J.G. Jeffreys, 1876)
-
Yoldiella extensa
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella fabula
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella folini
A. Warén, 1978
-
Yoldiella fora
(J.A. Allen, A. Sanders & G. Hannah, 1995)
-
Yoldiella frami
J. Knudsen, 1985
-
Scissileda franciscoi
(Shuto 1971) † (FOSSIL)
-
Yoldia frater
W.H. Dall, 1898 † (FOSSIL)
-
Yoldia freytagi
N.H. Ludbrook, 1966 † (FOSSIL)
-
Yoldiella frigida
(O.M. Torell, 1859)
-
Yoldiella fumosa
(E.A. Smith, 1895)
-
Portlandia furcata
M. Ichikawa & K. Maeda, 1958 † (FOSSIL)
-
Yoldia gackhensis
L. Krishtofovich, 1984 † (FOSSIL)
-
Yoldiella gibbosula
(K.H.J. Thiele & S.G.A. Jaeckel, 1931)
-
Yoldia glaberrima
(Münster, 1837 †) (FOSSIL)
-
Portlandia glacialis
(Wood, 1828 †) (FOSSIL)
-
Portlandia glacialis
(J.E. Gray, 1825)
-
Yoldia gladenkovi
Marincovich Jr., 1993 † (FOSSIL)
-
Yoldia glauca
J.T. Kuroda & T. Habe in T. Habe, 1961
-
Yoldiella granula
(W.H. Dall, 1908)
-
Yoldia gretschischkini
L. Krishtofovich, 1964 † (FOSSIL)
-
Microgloma guilonardi
(B.W. Hoeksema, 1993)
-
Yoldiella haasti
P.A. Maxwell, 1992 † (FOSSIL)
-
Orthoyoldia haboroensis
S. Uozumi, 1957 † (FOSSIL)
-
Yoldiella hamiltoni
(A.W.B. Powell, 1935)
-
Yoldiella hanna
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia hikoshimensis
K. Hirayama, 1956 † (FOSSIL)
-
Yoldiella hoylei
(E.A. Smith, 1885)
-
Yoldia hyperborea
(A.A. Gould, 1841)
-
Yoldia hyperborea limatuloides
K.W. Ockelmann, 1954
-
Portlandia impressa
Perri, 1975
-
Yoldia impressa
T.A. Conrad, 1865 † (FOSSIL)
-
Yoldiella incala
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella inconspicua
A.E. Verrill & K.J. Bush, 1898
-
Yoldiella indolens
(W.H. Dall, 1908)
-
Yoldiella inflata
A.E. Verrill & K.J. Bush, 1897
-
Yoldiella insculpta
(J.G. Jeffreys, 1879)
-
Portlandia intermedia
(G.O. Sars, 1865)
-
Scissileda iris
R.N. Kilburn, 1994
-
Portlandia isonota
(E.C. Von Martens, 1881)
-
Megayoldia japonica
(A. Adams & L.A. Reeve, 1850)
-
Yoldiella jeffreysi
(J.G. Hidalgo, 1877)
-
Yoldiella kaikonis
T.A. Okutani & Y. Fujiwara, 2005
-
Portlandia kakimii
S. Uozumi, 1957 † (FOSSIL)
-
Yoldia kermadecensis
Knudson, 1970
-
Yoldiella kibi
(J.T. Kuroda, 1929)
-
Yoldia kikuchii
J.T. Kuroda, 1929
-
Yoldia kindlei
G.F. Harris, 1896 † (FOSSIL)
-
Yoldia kissoumi
McLearn, 1933 † (FOSSIL)
-
Yoldia kovatschensis
(Slodkewitsch, 1938 †) (FOSSIL)
-
Yoldia laevis
(T. Say, 1824 †) (FOSSIL)
-
Yoldiella lapernoi
N.P. Benaim & R.S. Absalão, 2011
-
Yoldia lata
(R.B. Hinds, 1843)
-
Portlandia laudabilis
Yokoyama, 1924 † (FOSSIL)
-
Yoldiella lenticula
(H.P.C. Møller, 1842)
-
Yoldiella leonilda
(W.H. Dall, 1908)
-
Orthoyoldia lepidula
(A. Adams, 1856)
-
Yoldiella leurovata
J.D. Stilwell & Zinsmeister, 1992 † (FOSSIL)
-
Yoldiella librata
(R.K. Dell, 1952)
-
Yoldia limatula
(T. Say, 1831)
-
Yoldia limimtensis
K.B. Barinov, 1992 † (FOSSIL)
-
Orthoyoldia liorhina
(W.H. Dall, 1881)
-
Megayoldia lischkei
(E.A. Smith, 1885)
-
Yoldia longifrons
(T.A. Conrad, 1860 †) (FOSSIL)
-
Yoldia longissima
Slodkewitsch, 1936 † (FOSSIL)
-
Yoldiella lucida
(S.L. Lovén, 1846)
-
Microgloma macaron
N.P. Benaim & R.S. Absalão, 2011
-
Yoldia makarovi
Evseev, 1964 † (FOSSIL)
-
Yoldiella malletioides
P.A. Maxwell, 1992 † (FOSSIL)
-
Megayoldia martyria
W.H. Dall, 1897
-
Yoldia mater
Meyer, 1885 † (FOSSIL)
-
Yoldia (Sachalinella) matschigarica
(L. Krishtofovich, 1964 †) (FOSSIL)
-
Yoldia mcconnelli
H.D. Russell & Landes, 1937 † (FOSSIL)
-
Yoldia microdonta
Meek 1871 † (FOSSIL)
-
Yoldia micrometrica
G. Seguenza, 1877
-
Yoldia minima
G. Seguenza, 1877
-
Yoldiella minuscula
A.E. Verrill & K.J. Bush, 1897
-
Yoldiella minuta
(J.A. Allen, A. Sanders & G. Hannah, 1995)
-
Microgloma mirmidina
(P. Dautzenberg & H. Fischer, 1897)
-
Yoldiella mohakana
(J. Marwick, 1965 †) (FOSSIL)
-
Megayoldia montereyensis
(W.H. Dall, 1893)
-
Yoldia mortuasusensis
Clark & Woodford, 1927 † (FOSSIL)
-
Yoldia mosesi
E.G. Bryant & K.V.W. Palmer, 1923 † (FOSSIL)
-
Yoldia multiconcentrica
B. Wade, 1926 † (FOSSIL)
-
Yoldia myalis
(J.P.Y. Couthouy, 1838)
-
Yoldia (Cnesterium) nabiliana
(Simonova, 1937 †) (FOSSIL)
-
Yoldia (Sachalinella) nairoensis
(Evseev, 1964 †) (FOSSIL)
-
Yoldiella nana
(Sars, 1865)
-
Yoldiella nanula
(K.H.J. Thiele & S.G.A. Jaeckel, 1931)
-
Yoldia narthecia
(C. Hedley, 1915)
-
Yoldia navicula
L.S. Zhidkova, 1980
-
Microgloma nhanduti
N.P. Benaim & R.S. Absalão, 2011
-
Scissileda nicobarica
(J.G. Bruguière, 1789)
-
Yoldiella nielseni
Schnetler, 2001 † (FOSSIL)
-
Yoldia nitida
(G.B. Brocchi, 1814 †) (FOSSIL)
-
Yoldia notabilis
M. Yokoyama, 1922
-
Yoldiella obesa
(W. Stimpson, 1851)
-
Portlandia obliquistriata
(K. Amano, 1957 †) (FOSSIL)
-
Yoldiella oblonga
(J.P.L. Pelseneer, 1903)
-
Yoldia (Mirayoldia) oblukovinensis
Krishtofovich & Pronina, 1973 † (FOSSIL)
-
Yoldia obsoleta
Konova, 1984 † (FOSSIL)
-
Yoldiella olutoroensis
O.A. Scarlato, 1981
-
Yoldiella orbicularis
O.A. Scarlato, 1981
-
Yoldiella orcia
(W.H. Dall, 1916)
-
Yoldia (Kalayoldia) oregona
(Shumard, 1858 †) (FOSSIL)
-
Yoldia (Mirayoldia) ossoriensis
Pronina, 1973 † (FOSSIL)
-
Yoldiella otekaikensis
P.A. Maxwell, 1969 † (FOSSIL)
-
Yoldiella ovata
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella ovulum
R. La Perna, 2004
-
Portlandia pachia
(A.E. Verrill & K.J. Bush, 1898)
-
Orthoyoldia panamensis
(W.H. Dall, 1908)
-
Yoldiella paranapuaensis
N.P. Benaim & R.S. Absalão, 2011
-
Scissileda parceplicata
(K.H. Barnard, 1964)
-
Yoldia peninsularis
Anelli & al., 2006 † (FOSSIL)
-
Yoldiella perplexa
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella philippiana
(P. Nyst, 1845)
-
Yoldia pisciformis
J. Brown & H.A. Pilsbry, 1917 † (FOSSIL)
-
Yoldia posneri
L. Krishtofovich, 1973 † (FOSSIL)
-
Yoldiella powelli
(R.K. Dell, 1950)
-
Yoldia praeposneri
L. Krishtofovich, 1984 † (FOSSIL)
-
Yoldiella profundorum
(J.C. Melvill & R. Standen, 1912)
-
Yoldiella propinqua
(W. Leche, 1878)
-
Orthoyoldia psammotaea
W.H. Dall, 1898 † (FOSSIL)
-
Orthoyoldia psammotaea vivianensis
(G.F. Harris, 1919 †) (FOSSIL)
-
Yoldia pseudonotabilis
O.A. Scarlato, 1981
-
Microgloma pusilla
(J.G. Jeffreys, 1879)
-
Yoldiella pygmaea
(G.G. Münster, 1835 †) (FOSSIL)
-
Yoldia (Cnesterium) rekinnensis
V.N. Sinelnikova, 1990 † (FOSSIL)
-
Yoldiella remensa
(T. Iredale, 1929)
-
Yoldiella retusa
(R.B. Hinds, 1843)
-
Yoldiella riograndensis
(C. Esteves, 1984)
-
Yoldiella robusta
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia rostriformis
Y.B. Gladenkov, 1984 † (FOSSIL)
-
Yoldia rovascudae
F. Sacco, 1897 † (FOSSIL)
-
Yoldiella sabrina
(C. Hedley, 1916)
-
Yoldia sagittalia
Yokoyama, 1925 † (FOSSIL)
-
Yoldia saitoi
S. Uozumi, 1957 † (FOSSIL)
-
Portlandia sanchuensis
(Yabe & Nagao 1926) † (FOSSIL)
-
Yoldia sapotilla
(A.A. Gould, 1841)
-
Orthoyoldia scapania
(W.H. Dall, 1890)
-
Yoldia scissurata
W.H. Dall, 1897
-
Yoldia scissurata strigilata
W.H. Dall, 1909
-
Yoldiella seguenzae
A. Bonfitto & B. Sabelli, 1995
-
Yoldia seminuda
W.H. Dall, 1871
-
Yoldia seminuda ensifera
W.H. Dall, 1897
-
Scissileda semisculpta
(K.H.J. Thiele & S.G.A. Jaeckel, 1931)
-
Yoldiella semistriata
(J.G. Jeffreys, 1879)
-
Yoldia semistriata
(Wood, 1840 †) (FOSSIL)
-
Yoldia serica
T.A. Conrad, 1848 † (FOSSIL)
-
Orthoyoldia serotina
(R.B. Hinds, 1843)
-
Yoldiella siberutensis
(K.H.J. Thiele & S.G.A. Jaeckel, 1931)
-
Yoldiella similiris
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldiella similis
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia similis
J.T. Kuroda & T. Habe in T. Habe, 1961
-
Yoldiella sinuosa
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Orthoyoldia solenoides
(W.H. Dall, 1881)
-
Yoldiella solidula
A. Warén, 1989
-
Yoldiella sootryeni
J. Knudsen, 1970
-
Yoldiella squamaeformis
(T.A. Okutani, 1962)
-
Yoldiella stimulea
(J. Marwick, 1931 †) (FOSSIL)
-
Portlandia stricta
A.E. Verrill & K.J. Bush, 1897
-
Yoldiella striolata
(G.A. Brugnone, 1876)
-
Yoldia subamygdalea
Y.B. Gladenkov, 1984 † (FOSSIL)
-
Yoldiella subcircularis
(N.H. Odhner, 1960)
-
Yoldia subscitula
F.B. Meek & Hayden, 1865 † (FOSSIL)
-
Portlandia sulcifera
(L.A. Reeve, 1855)
-
Adranella sundaica
(K.H.J. Thiele & S.G.A. Jaeckel, 1931)
-
Yoldia supramontereyensis
R. Arnold, 1908 † (FOSSIL)
-
Yoldia (Cnesterium) supraoregona
Khomenko, 1931 † (FOSSIL)
-
Yoldia (Nampiella) takaradaiensis
(L. Krishtofovich, 1957 †) (FOSSIL)
-
Yoldiella tamara
(G.P. Gorbunov, 1946)
-
Yoldia temblorensis
F.M. Anderson & Martin, 1914 † (FOSSIL)
-
Orthoyoldia tenella
(R.B. Hinds, 1843)
-
Yoldia (Kalayoldia) tenuissima
(Clark, 1918 †) (FOSSIL)
-
Yoldiella thaerella
I.J. Killeen & H. Turner, 2009
-
Megayoldia thraciaeformis
(D.H. Storer, 1838)
-
Yoldia (Nampiella) tigilensis
(Slodkewitsch, 1938 †) (FOSSIL)
-
Yoldia tokunagai
M. Yokoyama, 1925 † (FOSSIL)
-
Yoldia toporoki
O.A. Scarlato, 1981
-
Yoldia totschiloensis
L. Krishtofovich, 1984
-
Megayoldia toyamaensis
(J.T. Kuroda, 1929)
-
Scissileda tropica
(J.C. Melvill, 1897)
-
Yoldia tschekhovi
L. Krishtofovich, 1964 † (FOSSIL)
-
Microgloma tumidula
(T.A. de M. Monterosato, 1880)
-
Yoldia uvutschensis
L. Krishtofovich, 1984 † (FOSSIL)
-
Yoldiella valettei
(É. Lamy, 1906)
-
Yoldia valida
Gladikova, 1984 † (FOSSIL)
-
Yoldiella valorousae
I.J. Killeen & H. Turner, 2009
-
Yoldia valvulus
J.W. Hall & R.P. Whitfield, 1872 † (FOSSIL)
-
Yoldia (Sachalinella) vasiljevskii
(Slodkewitsch, 1938 †) (FOSSIL)
-
Yoldiella veletta
J.A. Allen, A. Sanders & G. Hannah, 1995
-
Yoldia vengeriana
L. Krishtofovich, 1959 † (FOSSIL)
-
Yoldiella wareni
R. La Perna, 2004
-
Yoldia (Cnesterium) yabei
(M. Yokoyama, 1924 †) (FOSSIL)
-
Yoldia (Cnesterium) yamagatana
S. Nomura & N. Zinbo, 1937 † (FOSSIL)
-
Microgloma yongei
(A. Sanders & J.A. Allen, 1973)
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