101 Species in Family Yoldiidae
| Scientific Name | Author | English Name |
|---|---|---|
| Megayoldia martyria | (Dall, 1897) | Oblique yoldia |
| Megayoldia montereyensis | (Dall, 1893) | Monterey yoldia |
| Megayoldia thraciaeformis | (Storer, 1838) | Broad yoldia |
| Orthoyoldia crosbyana | (Guppy, 1882) | |
| Orthoyoldia lepidula | (Adams, 1856) | |
| Orthoyoldia scapania | (Dall, 1890) | |
| Portlandia aestuariorum | (Mosevich, 1928) | Estuary yoldia |
| Portlandia arctica | (Gray, 1824) | Arctic yoldia |
| Portlandia dalli | Krause, 1885 | |
| Portlandia glacialis | (Gray, 1828) | |
| Portlandia intermedia | (Sars, 1865) | Intermediate yoldia |
| Portlandia isonota | (Martens, 1881) | Kerguelen nut shell |
| Portlandia minuscula | (Verrill & Bush, 1898) | |
| Portlandia pachia | (Verrill & Bush, 1898) | |
| Portlandia pygmaea | (Muenster, 1835) | |
| Portlandia subangulata | (Verrill & Bush, 1898) | |
| Scissileda tropica | (Melvill, 1897) | |
| Yoldiella orcia | (Dall, 1916) | California yoldia |
| Yoldiella ovulum | La Perna, 2004 | |
| Yoldiella philippiana | (Nyst, 1844) | |
| Yoldiella powelli | (Dell, 1950) | |
| Yoldiella profundorum | (Melvill & Standen, 1912) | |
| Yoldiella propinqua | (Leche, 1878) | |
| Yoldiella pusilla | (Jeffreys, 1879) | |
| Yoldiella robusta | Allen, Sanders & Hannah, 1995 | |
| Yoldia aeolica | (Valenciennes, 1846) | |
| Yoldia beringiana | Dall, 1916 | |
| Yoldia callista | Bush, 1893 | |
| Yoldia casta | Verrill & Bush, 1898 | |
| Yoldia cooperii | Gabb, 1865 | Cooper yoldia |
| Yoldia excavata | unspecified | |
| Yoldia glauca | Kuroda & Habe, 1961 | |
| Yoldia hyperborea | (Gould, 1841) | Northern yoldia |
| Yoldia japonica | (Adams & Reeve, 1850) | |
| Yoldia keppeliana | Sowerby, 1904 | |
| Yoldia lepidula | Adams, 1856 | |
| Yoldia limatula | (Say, 1831) | File yoldia |
| Yoldia liorhina | Dall, 1881 | |
| Yoldia lischkei | Smith 1885 | |
| Yoldia martyria | Dall, 1897 | |
| Yoldia minima | Seguenza, 1877 | |
| Yoldia myalis | (Couthouy, 1838) | Oval yoldia |
| Yoldia notobilis | Yokoyama, 1922 | |
| Yoldia regularis | Verrill, 1884 | |
| Yoldia riograndensis | Esteves, 1984 | |
| Yoldia sapotilla | (Gould, 1841) | Shot yoldia |
| Yoldia secunda | Dall, 1916 | |
| Yoldia seminuda | Dall, 1871 | Oblique-lined yoldia |
| Yoldia serotina | (Hinds, 1843) | |
| Yoldia similis | Kuroda & Habe, 1958 | |
| Yoldia solenoides | Dall, 1881 | |
| Yoldiella americana | Allen, Sanders & Hannah, 1995 | |
| Yoldiella annenkovae | (Gorbunov, 1946) | |
| Yoldiella antarctica | Thiele, 1912 | |
| Yoldiella argentinensis | Allen, Sanders & Hannah, 1995 | |
| Yoldiella biguttata | Allen, Sanders & Hannah, 1995 | |
| Yoldiella blanda | Allen, Sanders & Hannah, 1995 | |
| Yoldiella cecinella | (Dall, 1916) | |
| Yoldiella chilenica | (Dall, 1908) | |
| Yoldiella curta | Verrill & Bush, 1898 | |
| Yoldiella dicella | unspecified | |
| Yoldiella dissimilis | (Verrill & Bush, 1898) | Different yoldia |
| Yoldiella ecaudata | Pelseneer, 1903 | |
| Yoldiella ella | Allen, Sanders & Hannah, 1995 | |
| Yoldiella enata | Allen, Sanders & Hannah, 1995 | |
| Yoldiella expansa | (Jeffreys, 1876) | |
| Yoldiella extensa | Allen, Sanders & Hannah, 1995 | |
| Yoldiella fabula | Allen, Sanders & Hannah, 1995 | |
| Yoldiella frami | Knudsen, 1985 | |
| Yoldiella frigida | (Torell, 1859) | Frigid yoldia |
| Yoldiella granula | (Dall, 1908) | |
| Yoldiella hamiltoni | (Powell, 1935) | |
| Yoldiella inaequisculpta | (Lamy, 1906) | |
| Yoldiella incala | Allen, Sanders & Hannah, 1995 | |
| Yoldiella inconspicua | (Verrill & Bush, 1898) | Inconspicuous yoldia |
| Yoldiella indolens | (Dall, 1908) | |
| Yoldiella inflata | (Verrill & Bush, 1897) | |
| Yoldiella insculpta | (Jeffreys, 1879) | |
| Yoldiella intermedia | (Sars, 1865) | |
| Yoldiella iris | (Verrill & Bush, 1897) | |
| Yoldiella jeffreysi | (Hidalgo, 1877) | |
| Yoldiella lenticula | (Moller, 1842) | Lenticulate yoldia |
| Yoldiella librata | (Dell, 1952) | |
| Yoldiella lucida | (Loven, 1846) | Iridescent yoldia |
| Yoldiella messanensis | (Jeffreys, 1870) | |
| Yoldiella nana | (Sars, 1865) | Sibling yoldia |
| Yoldiella obesa | (Stimpson, 1851) | |
| Yoldiella oblonga | Pelseneer, 1898 | |
| Yoldiella oleacina | (Dall, 1916) | |
| Yoldiella sabrina | (Hedley, 1916) | |
| Yoldiella siliqua | (Reeve, 1855) | |
| Yoldiella similiris | Allen, Sanders & Hannah, 1995 | |
| Yoldiella solidula | Warén, 1989 | |
| Yoldiella striolata | (Brugnone, 1876) | |
| Yoldiella subaequilatera | (Jeffreys, 1879) | |
| Yoldiella subangulata | (Verrill & Bush, 1898) | |
| Yoldiella subcircularis | (Odhner, 1960) | |
| Yoldiella tamara | (Gorbunov, 1946) | Arctic miniature-nutclam |
| Yoldiella triolatae | (Brugnone, 1876) | |
| Yoldiella valettei | (Lamy, 1906) | |
| Yoldiella wareni | La Perna, 2004 |