abbreviata, Yoldia abbreviata Sowerby, 1871 - syn of: Yoldia eightsii (Jay, 1839)
abyssicola, Yoldiella abyssicola (Knudsen, 1970)
abyssicola, Yoldia abyssicola Sars, 1872 - syn of: Malletia obtusa (Sars, 1872)
abyssicola, Yoldiella abyssicola Torell, 1859 - syn of: Yoldiella lenticula (Möller, 1842)
abyssorum, Yoldiella abyssorum Knudsen, 1970
acuminata, Yoldiella acuminata Jeffreys, 1870 - syn of: Ledella messanensis (Jeffreys, 1870)
aestuariorum, Portlandia aestuariorum (Mosevich, 1928)
aethiopica, Yoldiella aethiopica (Thiele & Jaeckel, 1931)
alleni, Yoldiella alleni Huber, 2010
alluaudi, Yoldiella alluaudi (Dautzenberg & Fischer, 1897)
amaninensis, Yoldia amaninensis Simonova † (FOSSIL)
americana, Yoldiella americana Allen, Sanders & Hannah, 1995
amygdalea, Yoldia amygdalea Habe, 1964 - syn of: Yoldia bartschi Scarlato, 1981
amygdalea, Yoldia amygdalea Valenciennes, 1846
anatina, Scissileda anatina (Smith, 1896)
angularis, Yoldia angularis Møller, 1842 - syn of: Megayoldia thraciaeformis (Storer, 1838)
angularis, Megayoldia angularis Møller, 1842 - syn of: Megayoldia thraciaeformis (Storer, 1838)
angularis, Yoldia angularis Møller, 1842 - syn of: Megayoldia thraciaeformis (Storer, 1838)
angusta, Yoldia angusta Krishtofovich, 1984 † - syn of: Yoldia longissima Slodkewitsch, 1936 † (FOSSIL)
annenkovae, Yoldiella annenkovae (Gorbunov, 1946)
antarctica, Yoldiella antarctica (Thiele, 1912)
antiqua, Yoldia antiqua Gladenkov, 1994 † (FOSSIL)
araribola, Yoldiella araribola Benaim & Absalão, 2011
arctica, Portlandia arctica (Gray, 1824)
arctica, Portlandia arctica Messjatsev, 1931 - syn of: Yoldiella lenticula (Möller, 1842)
arctica aestuariorum, Portlandia arctica aestuariorum Mosevich, 1928 - syn of: Portlandia aestuariorum (Mosevich, 1928)
arctica inflata, Yoldia arctica inflata Leche, 1883 - syn of: Portlandia arctica (Gray, 1824)
arctica nux, Yoldia arctica nux Brøgger, 1900 - syn of: Portlandia arctica (Gray, 1824)
arctica ovata, Yoldia arctica ovata Mosevich, 1928 - syn of: Portlandia arctica (Gray, 1824)
arctica typica, Portlandia arctica typica Filatova, 1951 - syn of: Portlandia arctica (Gray, 1824)
arcuata, Portlandia arcuata Pronina, 1969 † - syn of: Portlandella arcuata (Pronina, 1969) † (FOSSIL)
ardgowanica, Yoldiella ardgowanica (Powell, 1935) † (FOSSIL)
argentinensis, Yoldiella argentinensis Allen, Sanders & Hannah, 1995
artipica, Yoldiella artipica Allen, Sanders & Hannah, 1995
aurata, Yoldia aurata Lan & Lee, 2001
bartschi, Yoldia bartschi Scarlato, 1981
bella, Yoldia bella Berezovsky, 2015 † (FOSSIL)
beringiana, Yoldia beringiana Dall, 1916 - syn of: Megayoldia montereyensis (Dall, 1893)
beringiana, Yoldia beringiana Dall, 1916 - syn of: Megayoldia montereyensis (Dall, 1893)
bernardi, Yoldiella bernardi (Dautzenberg & Fischer, 1897)
bersoni, Mirayoldia bersoni Pronina, 1973 † (FOSSIL)
biguttata, Yoldiella biguttata Allen, Sanders & Hannah, 1995
bilanta, Yoldiella bilanta Allen, Sanders & Hannah, 1995
biremis, Yoldia biremis Uozumi, 1957 † (FOSSIL)
biscayensis, Yoldiella biscayensis Allen, Sanders & Hannah, 1995
blanda, Yoldiella blanda Allen, Sanders & Hannah, 1995
bocasensis, Yoldia bocasensis Olsson, 1922 † (FOSSIL)
bruta, Yoldia bruta Krishtofovich, 1984 † - syn of: Yoldia longissima Slodkewitsch, 1936 † (FOSSIL)
cadizensis, Yoldiella cadizensis Hoffman, van Heugten & Lavaleye, 2009
callista, Yoldia callista Bush, 1893
capensis, Yoldiella capensis Allen, Sanders & Hannah, 1995
capsa, Yoldiella capsa (Dall, 1916)
carbonaria, Yoldia carbonaria McChesney, 1859 † - syn of: Palaeoneilo oweni (McChesney, 1859) † (FOSSIL)
cascoensis, Yoldia cascoensis Mighels & Adams, 1842 - syn of: Yoldia myalis (Couthouy, 1838)
casta, Adranella casta (Verrill & Bush, 1898)
caudata, Yoldia caudata Khomenko, 1973 † (FOSSIL)
cecinella, Yoldiella cecinella (Dall, 1916)
cerussata, Portlandia cerussata Slodkewitsch, 1938 † - syn of: Portlandella watasei (Kanehara, 1937) † (FOSSIL)
chejensis, Yoldia chejensis Simonova, 1941 † - syn of: Yoldia chojensis Simonova, 1941 † (FOSSIL)
chejsliensis, Yoldia chejsliensis Gladenkov, 1990 † (FOSSIL)
chilenica, Yoldiella chilenica (Dall, 1908)
chojensis, Yoldia chojensis Simonova, 1941 † (FOSSIL)
chojensis turbida, Yoldia chojensis turbida Krishtofovich, 1969 † - syn of: Yoldia chojensis Simonova, 1941 † (FOSSIL)
claibornensis, Orthoyoldia claibornensis (Conrad, 1848) † (FOSSIL)
clara, Scissileda clara (Melvill, 1898)
clarkei, Yoldiella clarkei Knudsen, 1970
clydaniona, Yoldia clydaniona Dockery, 1982 † (FOSSIL)
clydoniona, Yoldia clydoniona Dockery, 1982 † (FOSSIL)
collinsoni, Portlandia collinsoni Dall, 1919 - syn of: Portlandia arctica (Gray, 1824)
conceptionis, Yoldia conceptionis Dall, 1896 - syn of: Poroleda uschakovi (Scarlato, 1981)
corpulentoides, Yoldia corpulentoides Aldrich, 1895 † - syn of: Nuculana corpulentoides (Aldrich, 1895) † (FOSSIL)
crassicardo, Scissileda crassicardo Kilburn, 1994
crosbyana, Orthoyoldia crosbyana (Guppy, 1882)
cuneata, Yoldia cuneata Krishtofovich, 0 † - syn of: Cnesterium supraoregona Khomenko, 1931 † (FOSSIL)
cuneistriata, Portlandia cuneistriata Ichikawa & Maeda, 1958 † (FOSSIL)
cuniculi, Yoldiella cuniculi (Marwick, 1965) † (FOSSIL)
cupressensis, Yoldia cupressensis Russell & Landes, 1937 † (FOSSIL)
curta, Yoldiella curta Verrill & Bush, 1898
curupira, Yoldiella curupira Benaim & Absalão, 2011
dalli, Portlandia dalli Krause, 1885 - syn of: Megayoldia thraciaeformis (Storer, 1838)
dalli, Portlandia dalli Krause, 1885 - syn of: Megayoldia thraciaeformis (Storer, 1838)
dautzenbergi, Yoldiella dautzenbergi La Perna, 2008
decipiens, Portlandia decipiens Smith, 1885
deformis, Yoldia deformis Kogan, 1939 † - syn of: Portlandella watasei (Kanehara, 1937) † (FOSSIL)
defossata, Yoldia defossata Quilty & al., 2016 † (FOSSIL)
derjugini, Yoldiella derjugini Scarlato, 1981
deshayesiana, Portlandia deshayesiana (Nyst, 1835) † (FOSSIL)
despecta, Yoldiella despecta (Smith, 1885)
dicella, Yoldia dicella Dall, 1908 - syn of: Ledella dicella (Dall, 1908)
dicella, Yoldiella dicella Dall, 1908 - syn of: Ledella dicella (Dall, 1908)
dissimilis, Yoldiella dissimilis Verrill & Bush, 1898
divaricata, Scissileda divaricata (Odhner, 1919)
djakovi, Yoldia djakovi Slodkewitsch, 1938 † (FOSSIL)
dowlingi, Yoldia dowlingi Russell & Landes, 1937 † (FOSSIL)
dubia, Portlandia dubia Naumov & Fedjakov, 1994 - syn of: Portlandia arctica (Gray, 1824)
duprei, Yoldia duprei Weaver & Palmer, 1922 † (FOSSIL)
dvalii, Portlandia dvalii Krishtofovich, 1984 † - syn of: Portlandella nitida (Slodkewitsch, 1936) † (FOSSIL)
ecaudata, Yoldiella ecaudata (Pelseneer, 1903)
eightsii, Yoldia eightsii (Jay, 1839)
electra, Yoldia electra Auct. non Adams, 1846 - syn of: Adrana penascoensis (Lowe, 1935)
elinguor, Yoldiella elinguor Kilburn, 1994 - syn of: Ledella elinguor (Kilburn, 1994)
ella, Yoldiella ella Allen, Sanders & Hannah, 1995
elliptica, Yoldia elliptica Yokoyama, 1924 † - syn of: Portlandia laudabilis Yokoyama, 1924 † (FOSSIL)
enata, Yoldiella enata Allen, Sanders & Hannah, 1995
enemtensis, Yoldia enemtensis Gladenkov, 1979 † (FOSSIL)
ensifera, Yoldia seminuda ensifera Dall
ensifera plena, Yoldia ensifera plena Dall, 1908 - syn of: Yoldia seminuda Dall, 1871
epilongissima, Yoldia epilongissima Gladenkov, 1972 † (FOSSIL)
epimultidentata, Yoldia epimultidentata Gladenkov, 1972 † - syn of: Multidentata epimultidentata (Gladenkov, 1972) † (FOSSIL)
ermanensis, Cnesterium ermanensis Gladenkov, 1976 † (FOSSIL)
evansi, Yoldia evansi Meek & Hayden, 1857 † (FOSSIL)
excavata, Yoldia excavata Dall, 1925 - syn of: Yoldia notabilis Yokoyama, 1922
exigua, Yoldiella exigua (Thiele & Jaeckel, 1931)
exotica, Portlandia exotica Okutani & Lan, 1999 - syn of: Taiwannuculana exotica (Okutani & Lan, 1999)
expansa, Yoldiella expansa (Jeffreys, 1876)
extensa, Yoldiella extensa Allen, Sanders & Hannah, 1995
fabula, Yoldiella fabula Allen, Sanders & Hannah, 1995
folini, Yoldiella folini Warén, 1978
fora, Yoldiella fora (Allen, Sanders & Hannah, 1995)
frami, Yoldiella frami Knudsen, 1985
franciscoi, Scissileda franciscoi (Shuto, 1971) † (FOSSIL)
frater, Yoldia frater Dall, 1898 † (FOSSIL)
fraterna, Yoldiella fraterna Verrill & Bush, 1898 - syn of: Yoldiella nana (Sars, 1865)
fraterna, Yoldiella fraterna Verrill & Bush, 1898 - syn of: Yoldiella nana (Sars, 1865)
freytagi, Yoldia freytagi Ludbrook, 1966 † (FOSSIL)
frigida, Yoldiella frigida (Torell, 1859)
frigida mediterranea, Yoldiella frigida mediterranea Nordsieck, 1974 - syn of: Yoldiella philippiana (Nyst, 1845)
fumosa, Yoldiella fumosa (Smith, 1895)
furcata, Portlandia furcata Ichikawa & Maeda, 1958 † (FOSSIL)
gackhensis, Yoldia gackhensis Krishtofovich, 1984 † (FOSSIL)
gardneri, Yoldia gardneri Oldroyd, 1935 - syn of: Yoldia hyperborea (Gould, 1841)
germena, Yoldia germena Gladikova, 1984 † - syn of: Yoldia posneri Krishtofovich, 1973 † (FOSSIL)
gibbosula, Yoldiella gibbosula (Thiele & Jaeckel, 1931)
glaberrima, Yoldia glaberrima (Münster, 1837) † (FOSSIL)
glacialis, Portlandia glacialis (Gray, 1825)
glacialis, Portlandia glacialis (Wood, 1828) † (FOSSIL)
gladenkovi, Yoldia gladenkovi Marincovich Jr., 1993 † (FOSSIL)
glauca, Yoldia glauca Kuroda & Habe, 1961
gloriosa, Yoldia gloriosa Adams, 1856 - syn of: Adrana gloriosa (Adams, 1856)
gorbunovi, Yoldiella gorbunovi Scarlato & Kafanov, 1988 - syn of: Yoldiella derjugini Scarlato, 1981
granula, Yoldiella granula (Dall, 1908)
gretschischkini, Yoldia gretschischkini Krishtofovich, 1964 † (FOSSIL)
groenlandica, Megayoldia groenlandica Posselt, 1898 - syn of: Megayoldia thraciaeformis (Storer, 1838)
guilonardi, Microgloma guilonardi (Hoeksema, 1993)
haasti, Yoldiella haasti Maxwell, 1992 † (FOSSIL)
haboroensis, Orthoyoldia haboroensis Uozumi, 1957 † (FOSSIL)
hadalis, Yoldiella hadalis Knudsen, 1970 - syn of: Parayoldiella knudseni Filatova & Schileyko, 1985
hamiltoni, Yoldiella hamiltoni (Powell, 1935)
hanna, Yoldiella hanna Allen, Sanders & Hannah, 1995
hikoshimensis, Yoldia hikoshimensis Hirayama, 1956 † (FOSSIL)
hoylei, Yoldiella hoylei (Smith, 1885)
hyperborea, Yoldia hyperborea (Gould, 1841)
hyperborea, Yoldia hyperborea Torrell, 1859 - syn of: Yoldia hyperborea (Gould, 1841)
hyperborea limatuloides, Yoldia hyperborea limatuloides Ockelmann, 1954
idsubonini, Yoldiella idsubonini Filatova, 1971 - syn of: Parayoldiella idsubonini (Filatova, 1971)
imleri, Yoldia imleri Waterfall, 1929 - syn of: Yoldia seminuda Dall, 1871
impressa, Yoldia impressa Conrad, 1865 † (FOSSIL)
impressa, Portlandia impressa Perri, 1975
inaequisculpta, Yoldia inaequisculpta Lamy, 1906 - syn of: Nuculana inaequisculpta (Lamy, 1906)
inaequisculpta, Yoldiella inaequisculpta Lamy, 1906 - syn of: Nuculana inaequisculpta (Lamy, 1906)
inaudax, Yoldiella inaudax Smith, 1885 - syn of: Nuculana solida (Dall, 1881)
incala, Yoldiella incala Allen, Sanders & Hannah, 1995
inconspicua, Yoldiella inconspicua Verrill & Bush, 1898
inconspicua africana, Yoldia inconspicua africana Allen, Sanders & Hannah, 1995 - syn of: Yoldiella inconspicua Verrill & Bush, 1898
inconspicua profundorum, Yoldiella inconspicua profundorum Allen, Sanders & Hannah, 1995 - syn of: Yoldiella alleni Huber, 2010
indolens, Yoldiella indolens (Dall, 1908)
inflata, Yoldiella inflata Verrill & Bush, 1897
infrequens, Yoldia infrequens Dall, 1908 - syn of: Tindaria virens (Dall, 1890)
insculpta, Yoldiella insculpta (Jeffreys, 1879)
intermedia, Portlandia intermedia (Sars, 1865)
intermedia major, Yoldiella intermedia major Leche, 1878 - syn of: Portlandia intermedia (Sars, 1865)
iris, Scissileda iris Kilburn, 1994
iris, Yoldia iris Verrill & Bush, 1898 - syn of: Yoldiella lucida (Lovén, 1846)
iris stricta, Yoldiella iris stricta Verrill & Bush, 1898 - syn of: Yoldiella lucida (Lovén, 1846)
isonota, Portlandia isonota (Von Martens, 1881)
japonica, Megayoldia japonica (Adams & Reeve, 1850)
jeffreysi, Yoldiella jeffreysi (Hidalgo, 1877)
jeffreysi, Yoldia jeffreysi Verrill, 1884 - syn of: Yoldiella curta Verrill & Bush, 1898
johanni, Yoldia johanni Dall, 1925 - syn of: Yoldia seminuda Dall, 1871
kaikonis, Yoldiella kaikonis Okutani & Fujiwara, 2005
kakimii, Portlandia kakimii Uozumi, 1957 † (FOSSIL)
kamchatkana, Megayoldia kamchatkana Scarlato, 1981 - syn of: Megayoldia montereyensis (Dall, 1893)
kamtchatkana, Megayoldia kamtchatkana Scarlato, 1981 - syn of: Megayoldia montereyensis (Dall, 1893)
karaginskiensis, Megayoldia karaginskiensis Gladenkov, 1972 † - syn of: Portlandella karaginskiensis (Gladenkov, 1972) † (FOSSIL)
keenae, Yoldia keenae Wagner, 1959 - syn of: Yoldia hyperborea (Gould, 1841)
keppeliana, Yoldia keppeliana Sowerby, 1904 - syn of: Yoldia seminuda Dall, 1871
keppeliana pseudonotabile, Yoldia keppeliana pseudonotabile Scarlato, 1981 - syn of: Yoldia pseudonotabilis Scarlato, 1981
kerguelensis, Yoldia kerguelensis Thiele & Jaeckel, 1931 - syn of: Yoldia eightsii (Jay, 1839)
kermadecensis, Yoldia kermadecensis Knudsen, 1970 - syn of: Parayoldiella kermadecensis (Knudsen, 1970)
kermadecensis, Portlandia kermadecensis Knudsen, 1970 - syn of: Parayoldiella kermadecensis (Knudsen, 1970)
kermadecensis, Yoldia kermadecensis Knudson, 1970
kibi, Yoldiella kibi (Kuroda, 1929)
kikuchii, Yoldia kikuchii Kuroda, 1929
kindlei, Yoldia kindlei Harris, 1896 † (FOSSIL)
kissoumi, Yoldia kissoumi McLearn, 1933 † (FOSSIL)
kolthoffi, Portlandia kolthoffi Hägg, 1904 - syn of: Katadesmia kolthoffi (Hägg, 1904)
kovatschensis, Yoldia kovatschensis (Slodkewitsch, 1938) † (FOSSIL)
kuluntunensis, Yoldia kuluntunensis Slodkewitsch, 1936 - syn of: Yoldia seminuda Dall, 1871
kuluntunensis sakhalinensis, Yoldia kuluntunensis sakhalinensis Slodkewitsch, 1936 - syn of: Yoldia seminuda Dall, 1871
labiata, Yoldia labiata Sowerby, 1871 - syn of: Yoldia hyperborea (Gould, 1841)
laevis, Yoldia laevis (Say, 1824) † (FOSSIL)
lapernoi, Yoldiella lapernoi Benaim & Absalão, 2011
lata, Yoldia lata (Hinds, 1843)
lata, Yoldia lata Allen, Sanders & Hannah, 1995 - syn of: Yoldiella jeffreysi (Hidalgo, 1877)
lata orion, Yoldia lata orion Iredale, 1939 - syn of: Yoldia lata (Hinds, 1843)
laternaria, Megayoldia laternaria Valenciennes, 1846 - syn of: Megayoldia thraciaeformis (Storer, 1838)
laudabilis, Portlandia laudabilis Yokoyama, 1924 † (FOSSIL)
lenticula, Yoldiella lenticula (Möller, 1842)
lenticula, Portlandia lenticula Møller, 1842 - syn of: Yoldiella lenticula (Möller, 1842)
lenticula amblia, Yoldiella lenticula amblia Verrill & Bush, 1898 - syn of: Yoldiella lenticula (Möller, 1842)
lenticula gibbosa, Yoldiella lenticula gibbosa Smith, 0 - syn of: Yoldiella alluaudi (Dautzenberg & Fischer, 1897)
lenticula philippiana, Yoldiella lenticula philippiana Nyst, 1845 - syn of: Yoldiella philippiana (Nyst, 1845)
lenticula tomlini, Yoldiella lenticula tomlini Winckworth, 1932 - syn of: Yoldiella philippiana (Nyst, 1845)
leonilda, Yoldiella leonilda (Dall, 1908)
lepida, Yoldia lepida Adams, 1856 - syn of: Orthoyoldia serotina (Hinds, 1843)
lepidula, Orthoyoldia lepidula (Adams, 1856)
lepidula, Yoldia lepidula Adams, 1856 - syn of: Orthoyoldia lepidula (Adams, 1856)
leurovata, Yoldiella leurovata Stilwell & Zinsmeister, 1992 † (FOSSIL)
librata, Yoldiella librata (Dell, 1952)
limatula, Yoldia limatula (Say, 1831)
limatula gardneri, Yoldia limatula gardneri Oldroyd, 1935 - syn of: Yoldia hyperborea (Gould, 1841)
limatuloides, Yoldia hyperborea limatuloides Ockelmann
limimtensis, Yoldia limimtensis Barinov, 1992 † (FOSSIL)
lingulifer, Yoldiella lingulifer Kilburn, 1994 - syn of: Ledella lingulifer (Kilburn, 1994)
liorhina, Orthoyoldia liorhina (Dall, 1881)
lischkei, Megayoldia lischkei (Smith, 1885)
longifrons, Yoldia longifrons (Conrad, 1860) † (FOSSIL)
longissima, Yoldia longissima Slodkewitsch, 1936 † (FOSSIL)
lucida, Yoldiella lucida (Lovén, 1846)
lucida, Yoldia lucida Lovén, 1846 - syn of: Yoldiella lucida (Lovén, 1846)
lusoana, Yoldia lusoana Gladikova, 1984 † - syn of: Yoldia posneri Krishtofovich, 1973 † (FOSSIL)
macaron, Microgloma macaron Benaim & Absalão, 2011
makarovi, Yoldia makarovi Evseev, 1964 † (FOSSIL)
malletioides, Yoldiella malletioides Maxwell, 1992 † (FOSSIL)
mantana, Yoldia mantana Dall, 1908 - syn of: Ledella dicella (Dall, 1908)
mantana, Yoldiella mantana Dall, 1908 - syn of: Ledella dicella (Dall, 1908)
martyria, Megayoldia martyria Dall, 1897
mater, Yoldia mater Meyer, 1885 † (FOSSIL)
matschigarica, Sachalinella matschigarica (Krishtofovich, 1964) † (FOSSIL)
mcchesneyana, Yoldia mcchesneyana Girty, 1910 † - syn of: Palaeoneilo mcchesneyana (Girty, 1910) † (FOSSIL)
mcconnelli, Yoldia mcconnelli Russell & Landes, 1937 † (FOSSIL)
mediana, Portlandia mediana Filatova & Schileyko, 1984 - syn of: Parayoldiella mediana (Filatova & Schileyko, 1984)
mediana, Yoldia mediana Gladikova, 1984 † - syn of: Yoldia praeposneri Krishtofovich, 1984 † (FOSSIL)
messanensis, Yoldiella messanensis Jeffreys, 1870 - syn of: Ledella messanensis (Jeffreys, 1870)
microdonta, Yoldia microdonta Meek, 1871 † (FOSSIL)
micrometrica, Yoldia micrometrica Seguenza, 1877
microscopica, Yoldia microscopica Monterosato, 1878 - syn of: Microgloma pusilla (Jeffreys, 1879)
minima, Yoldia minima Seguenza, 1877
minuscula, Yoldiella minuscula Verrill & Bush, 1897
minuta, Yoldiella minuta (Allen, Sanders & Hannah, 1995)
mira, Yoldia mira Gladikova, 1984 † - syn of: Yoldia posneri Krishtofovich, 1973 † (FOSSIL)
mirmidina, Microgloma mirmidina (Dautzenberg & Fischer, 1897)
mirmidina, Yoldiella mirmidina Dautzenberg & Fischer, 1897 - syn of: Microgloma mirmidina (Dautzenberg & Fischer, 1897)
mohakana, Yoldiella mohakana (Marwick, 1965) † (FOSSIL)
montereyensis, Megayoldia montereyensis (Dall, 1893)
montereyensis, Yoldia montereyensis Dall, 1893 - syn of: Megayoldia montereyensis (Dall, 1893)
mortuasusensis, Yoldia mortuasusensis Clark & Woodford, 1927 † (FOSSIL)
mosesi, Yoldia mosesi Bryant & Palmer, 1923 † (FOSSIL)
mulleri, Megayoldia mulleri Gray, 1847 - syn of: Megayoldia thraciaeformis (Storer, 1838)
multiconcentrica, Yoldia multiconcentrica Wade, 1926 † (FOSSIL)
multidentata, Yoldia multidentata Khomenko, 1937 † - syn of: Megayoldia thraciaeformis (Storer, 1838) (FOSSIL)
myalis, Yoldia myalis (Couthouy, 1838)
nabiliana, Cnesterium nabiliana (Simonova, 1937) † (FOSSIL)
naganumana, Yoldia naganumana Kuroda, 1929 - syn of: Yoldia similis Kuroda & Habe, 1961
nairoensis, Sachalinella nairoensis (Evseev, 1964) † (FOSSIL)
nana, Yoldiella nana (Sars, 1865)
nanula, Yoldiella nanula (Thiele & Jaeckel, 1931)
narthecia, Yoldia narthecia (Hedley, 1915)
navicula, Yoldia navicula Zhidkova, 1980
navicularis, Megayoldia navicularis Couthouy, 1839 - syn of: Megayoldia thraciaeformis (Storer, 1838)
nhanduti, Microgloma nhanduti Benaim & Absalão, 2011
nicobarica, Scissileda nicobarica (Bruguière, 1789)
nielseni, Yoldiella nielseni Schnetler, 2001 † (FOSSIL)
nigromaculata, Portlandia nigromaculata Okutani, 1983 - syn of: Taiwannuculana nigromaculata (Okutani, 1983)
nitida, Yoldia nitida (Brocchi, 1814) † (FOSSIL)
nitida, Portlandia nitida Slodkewitsch, 1936 † - syn of: Portlandella nitida (Slodkewitsch, 1936) † (FOSSIL)
norvegica, Yoldia norvegica Dautzenberg & Fischer, 1912 - syn of: Yoldia hyperborea (Gould, 1841)
notabilis, Yoldia notabilis Yokoyama, 1922
obesa, Yoldiella obesa (Stimpson, 1851)
obesa incala, Yoldiella obesa incala Allen, Sanders & Hannah, 1995 - syn of: Yoldiella incala Allen, Sanders & Hannah, 1995
obliquistriata, Portlandia obliquistriata (Amano, 1957) † (FOSSIL)
oblonga, Yoldiella oblonga (Pelseneer, 1903)
oblonga, Yoldiella oblonga Jeffreys, 1874 - syn of: Yoldiella oblonga (Pelseneer, 1903)
oblukovinensis, Mirayoldia oblukovinensis Krishtofovich & Pronina, 1973 † (FOSSIL)
obsoleta, Yoldia obsoleta Konova, 1984 † (FOSSIL)
obtusa, Yoldia obtusa Sars, 1872 - syn of: Malletia obtusa (Sars, 1872)
obtusata, Yoldia obtusata Krishtofovich, 1984 † - syn of: Portlandella pilvoensis Slodkewitsch, 1938 † (FOSSIL)
ochotensis, Cnesterium ochotensis Khomenko, 1922 † - syn of: Yoldia notabilis Yokoyama, 1922 (FOSSIL)
ochotensis, Megayoldia ochotensis Scarlato, 1981 - syn of: Megayoldia thraciaeformis (Storer, 1838)
ochotensis, Megayoldia ochotensis Scarlato, 1981 - syn of: Megayoldia thraciaeformis (Storer, 1838)
oleacina, Portlandia oleacina Dall, 1916 - syn of: Portlandia intermedia (Sars, 1865)
olutoroensis, Yoldiella olutoroensis Scarlato, 1981
olympiana, Portlandia olympiana Clark, 0 † - syn of: Portlandella watasei (Kanehara, 1937) † (FOSSIL)
orbicularis, Yoldiella orbicularis Scarlato, 1981
orcia, Yoldiella orcia (Dall, 1916)
oregona, Kalayoldia oregona (Shumard, 1858) † (FOSSIL)
orientalis, Portlandia orientalis Krishtofovich, 1969 † - syn of: Portlandella orientalis Krishtofovich, 1969 † (FOSSIL)
orstomi, Yoldiella orstomi Cosel, 1995 - syn of: Ledella orstomi (Cosel, 1995)
ossoriensis, Mirayoldia ossoriensis Pronina, 1973 † (FOSSIL)
otekaikensis, Yoldiella otekaikensis Maxwell, 1969 † (FOSSIL)
ovata, Yoldiella ovata Allen, Sanders & Hannah, 1995
ovulum, Yoldiella ovulum La Perna, 2004
oweni, Yoldia oweni McChesney, 1859 † - syn of: Palaeoneilo oweni (McChesney, 1859) † (FOSSIL)
pachia, Portlandia pachia (Verrill & Bush, 1898)
pachia, Yoldiella pachia Verrill & Bush, 1898 - syn of: Portlandia pachia (Verrill & Bush, 1898)
panamensis, Orthoyoldia panamensis (Dall, 1908)
paranapuaensis, Yoldiella paranapuaensis Benaim & Absalão, 2011
parceplicata, Portlandia parceplicata (Barnard, 1964) - syn of: Scissileda parceplicata (Barnard, 1964)
parceplicata, Scissileda parceplicata (Barnard, 1964)
peninsularis, Yoldia peninsularis Anelli & al., 2006 † (FOSSIL)
perplexa, Yoldiella perplexa Allen, Sanders & Hannah, 1995
perprotracta, Yoldia perprotracta Dall, 1912 - syn of: Adrana tellinoides (Sowerby, 1823)
persei, Portlandia persei Messjatsev, 1931 - syn of: Yoldiella propinqua (Leche, 1878)
philippiana, Yoldiella philippiana (Nyst, 1845)
pisciformis, Yoldia pisciformis Brown & Pilsbry, 1917 † (FOSSIL)
polaris, Yoldiella polaris Messjatsev, 1931 - syn of: Yoldiella lenticula (Möller, 1842)
pompholyx, Yoldia pompholyx Dall, 1889 - syn of: Pseudoglomus pompholyx (Dall, 1889)
posneri, Yoldia posneri Krishtofovich, 1973 † (FOSSIL)
powelli, Yoldiella powelli (Dell, 1950)
praecaudata, Yoldia praecaudata Evseev, 1956 † - syn of: Yoldia caudata Khomenko, 1973 † (FOSSIL)
praelongissima, Yoldia praelongissima Krishtofovich, 1984 † - syn of: Yoldia longissima Slodkewitsch, 1936 † (FOSSIL)
praeposneri, Yoldia praeposneri Krishtofovich, 1984 † (FOSSIL)
profundorum, Yoldiella profundorum (Melvill & Standen, 1912)
profundorum, Yoldia profundorum Melvill & Standen, 1912 - syn of: Yoldiella profundorum (Melvill & Standen, 1912)
prolata, Yoldiella prolata Smith, 1885 - syn of: Bathyspinula prolata (Smith, 1885)
propinqua, Yoldiella propinqua (Leche, 1878)
psammotaea, Orthoyoldia psammotaea Dall, 1898 † (FOSSIL)
psammotaea vivianensis, Orthoyoldia psammotaea vivianensis (Harris, 1919) † (FOSSIL)
pseudonotabilis, Yoldia pseudonotabilis Scarlato, 1981
pusilla, Microgloma pusilla (Jeffreys, 1879)
pusio semistriata, Yoldiella pusio semistriata Jeffreys, 1879 - syn of: Yoldiella semistriata (Jeffreys, 1879)
pustulosa, Yoldiella pustulosa Jeffreys, 1876 - syn of: Ledella pustulosa (Jeffreys, 1876)
pygmaea, Yoldiella pygmaea (Münster, 1835) † (FOSSIL)
pygmaea, Yoldiella pygmaea Jeffreys, 1864 - syn of: Yoldiella philippiana (Nyst, 1845)
pygmaea symmetrica, Yoldia pygmaea symmetrica Friele, 1878 - syn of: Yoldiella propinqua (Leche, 1878)
quiba, Yoldia quiba Olsson, 1942 - syn of: Orthoyoldia panamensis (Dall, 1908)
regularis, Yoldia regularis Verrill, 1884 - syn of: Megayoldia thraciaeformis (Storer, 1838)
regularis, Megayoldia regularis Verrill, 1884 - syn of: Megayoldia thraciaeformis (Storer, 1838)
rekinnensis, Cnesterium rekinnensis Sinelnikova, 1990 † (FOSSIL)
remensa, Yoldiella remensa (Iredale, 1929)
retusa, Yoldiella retusa (Hinds, 1843)
riograndensis, Yoldiella riograndensis (Esteves, 1984)
robusta, Yoldiella robusta Allen, Sanders & Hannah, 1995
rostriformis, Yoldia rostriformis Gladenkov, 1984 † (FOSSIL)
rovascudae, Yoldia rovascudae Sacco, 1897 † (FOSSIL)
sabrina, Yoldiella sabrina (Hedley, 1916)
sagittalia, Yoldia sagittalia Yokoyama, 1925 † (FOSSIL)
saitoi, Yoldia saitoi Uozumi, 1957 † (FOSSIL)
sanchuensis, Portlandia sanchuensis (Yabe & Nagao, 1926) † (FOSSIL)
sanesia, Yoldia sanesia Dall, 1916 - syn of: Yoldiella orcia (Dall, 1916)
sapotilla, Yoldia sapotilla (Gould, 1841)
scapania, Orthoyoldia scapania (Dall, 1890)
scapha, Yoldia scapha Yokoyama, 1926 - syn of: Megayoldia thraciaeformis (Storer, 1838)
scapha, Megayoldia scapha Yokoyama, 1926 - syn of: Megayoldia thraciaeformis (Storer, 1838)
scissurata, Yoldia scissurata Dall, 1897
scissurata strigilata, Yoldia scissurata strigilata Dall, 1909
secunda, Yoldia secunda Dall, 1916 - syn of: Megayoldia thraciaeformis (Storer, 1838)
secunda, Megayoldia secunda Dall, 1916 - syn of: Megayoldia thraciaeformis (Storer, 1838)
seguenzae, Yoldiella seguenzae Bonfitto & Sabelli, 1995
seminuda, Yoldia seminuda Dall, 1871
seminuda ensifera, Yoldia seminuda ensifera Dall, 1897
semisculpta, Scissileda semisculpta (Thiele & Jaeckel, 1931)
semistriata, Yoldiella semistriata (Jeffreys, 1879)
semistriata, Yoldia semistriata (Wood, 1840) † (FOSSIL)
serica, Yoldia serica Conrad, 1848 † (FOSSIL)
sericea, Yoldia sericea Jeffreys, 1876 - syn of: Tindaria sericea (Jeffreys, 1876)
sericea striolata, Yoldia sericea striolata Verrill, 1884 - syn of: Neilonella salicensis (Seguenza, 1877)
serotina, Orthoyoldia serotina (Hinds, 1843)
serotina, Yoldia serotina Hinds, 1843 - syn of: Orthoyoldia serotina (Hinds, 1843)
siberutensis, Yoldiella siberutensis (Thiele & Jaeckel, 1931)
similiris, Yoldiella similiris Allen, Sanders & Hannah, 1995
similis, Yoldiella similis Allen, Sanders & Hannah, 1995
similis, Yoldia similis Kuroda & Habe, 1961
sinuosa, Yoldiella sinuosa Allen, Sanders & Hannah, 1995
solenoides, Orthoyoldia solenoides (Dall, 1881)
solenoides, Yoldia solenoides Dall, 1881 - syn of: Orthoyoldia solenoides (Dall, 1881)
solidula, Yoldiella solidula Warén, 1989
sootryeni, Yoldiella sootryeni Knudsen, 1970
squamaeformis, Yoldiella squamaeformis (Okutani, 1962)
stimulea, Yoldiella stimulea (Marwick, 1931) † (FOSSIL)
stricta, Portlandia stricta Verrill & Bush, 1897
strigata, Yoldia strigata Dall, 1909 - syn of: Yoldia seminuda Dall, 1871
strigilata, Yoldia scissurata strigilata Dall
striolata, Yoldiella striolata (Brugnone, 1876)
suavis, Yoldia suavis Konova, 1984 - syn of: Megayoldia thraciaeformis (Storer, 1838)
subaequilatera, Portlandia subaequilatera Jeffreys, 1879 - syn of: Yoldiella lucida (Lovén, 1846)
subaequilatera, Portlandia subaequilatera Ockelmann, 1959 - syn of: Yoldiella propinqua (Leche, 1878)
subaequilateralis, Yoldia subaequilateralis Smith, 1875 - syn of: Yoldia eightsii (Jay, 1839)
subalta, Yoldia subalta Khomenko, 1931 † - syn of: Cnesterium supraoregona Khomenko, 1931 † (FOSSIL)
subamygdalea, Yoldia subamygdalea Gladenkov, 1984 † (FOSSIL)
subangulata, Yoldiella subangulata Verrill & Bush, 1898 - syn of: Yoldiella lucida (Lovén, 1846)
subcircularis, Yoldiella subcircularis (Odhner, 1960)
sublischkei, Yoldia sublischkei Gladenkov, 1984 † - syn of: Portlandella sublischkei Gladenkov, 1984 † (FOSSIL)
subscitula, Yoldia subscitula Meek & Hayden, 1865 † (FOSSIL)
sulcifera, Portlandia sulcifera (Reeve, 1855)
sundaica, Adranella sundaica (Thiele & Jaeckel, 1931)
supramontereyensis, Yoldia supramontereyensis Arnold, 1908 † (FOSSIL)
supraoregona, Cnesterium supraoregona Khomenko, 1931 † (FOSSIL)
takaradaiensis, Nampiella takaradaiensis (Krishtofovich, 1957) † (FOSSIL)
tamara, Yoldiella tamara (Gorbunov, 1946)
temblorensis, Yoldia temblorensis Anderson & Martin, 1914 † (FOSSIL)
tenella, Orthoyoldia tenella (Hinds, 1843)
tenuissima, Kalayoldia tenuissima (Clark, 1918) † (FOSSIL)
thaerella, Yoldiella thaerella Killeen & Turner, 2009
thraciaeformis, Megayoldia thraciaeformis (Storer, 1838)
tigilensis, Nampiella tigilensis (Slodkewitsch, 1938) † (FOSSIL)
tokunagai, Yoldia tokunagai Yokoyama, 1925 † (FOSSIL)
tomlini, Yoldiella tomlini Winckworth, 1932 - syn of: Yoldiella philippiana (Nyst, 1845)
toporoki, Yoldia toporoki Scarlato, 1981
toporoki olchovica, Yoldia toporoki olchovica Petrov, 1982 - syn of: Yoldia toporoki Scarlato, 1981
totschiloensis, Yoldia totschiloensis Krishtofovich, 1984
toyamaensis, Megayoldia toyamaensis (Kuroda, 1929)
tropica, Scissileda tropica (Melvill, 1897)
tschekhovi, Yoldia tschekhovi Krishtofovich, 1964 † (FOSSIL)
tumidula, Microgloma tumidula (Monterosato, 1880)
turnerae, Microgloma turnerae Sanders & Allen, 1973 - syn of: Microgloma tumidula (Monterosato, 1880)
ultraabyssalis, Yoldiella ultraabyssalis Filatova, 1971 - syn of: Parayoldiella ultraabyssalis (Filatova, 1971)
uvutschensis, Yoldia uvutschensis Krishtofovich, 1984 † (FOSSIL)
valettei, Yoldiella valettei (Lamy, 1906)
valida, Yoldia valida Gladikova, 1984 † (FOSSIL)
valorousae, Yoldiella valorousae Killeen & Turner, 2009
valvulus, Yoldia valvulus Hall & Whitfield, 1872 † (FOSSIL)
vancouverensis, Yoldia vancouverensis Smith, 1880 - syn of: Yoldia myalis (Couthouy, 1838)
vasiljevskii, Sachalinella vasiljevskii (Slodkewitsch, 1938) † (FOSSIL)
veletta, Yoldiella veletta Allen, Sanders & Hannah, 1995
vengeriana, Yoldia vengeriana Krishtofovich, 1959 † (FOSSIL)
vengeriana, Yoldia vengeriana Lautenschläger, 1961 † - syn of: Yoldia vengeriana Krishtofovich, 1959 † (FOSSIL)
vicina, Yoldia vicina Smith, 1906 - syn of: Scissileda tropica (Melvill, 1897)
vincula, Yoldia vincula Dall, 1908 - syn of: Katadesmia vincula (Dall, 1908)
vivianensis, Orthoyoldia psammotaea vivianensis Harris (FOSSIL)
wareni, Yoldiella wareni La Perna, 2004
watasei, Yoldia watasei Kanehara, 1937 † - syn of: Portlandella watasei (Kanehara, 1937) † (FOSSIL)
woodwardi, Yoldia woodwardi Hanley, 1860 - syn of: Yoldia eightsii (Jay, 1839)
woodwarsi, Yoldia woodwarsi Hnadley, 1860 - syn of: Yoldia eightsii (Jay, 1839)
yabei, Cnesterium yabei (Yokoyama, 1924) † (FOSSIL)
yamagatana, Cnesterium yamagatana Nomura & Zinbo, 1937 † (FOSSIL)
yongei, Microgloma yongei (Sanders & Allen, 1973)
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