| Scientific Name | Author | English Name |
|---|---|---|
| Adontorhina cyclia | Berry, 1947 | Circle axinopsid |
| Adontorhina pisum | (Dall, 1908) | |
| Adontorhina sphaericosa | Scott, 1986 | Inflated axinopsid |
| Axinodon redondoensis | (Burch, 1941) | Elongate axinopsid |
| Axinopsida cordata | (Verrill & Bush, 1898) | Heart axinopsid |
| Axinopsida orbiculata | (Sars, 1878) | Orbicular axinopsid |
| Axinopsida serricata | (Carpenter, 1864) | Lenticular axinopsid |
| Axinopsida viridis | (Dall, 1901) | |
| Axinulus careyi | Bernard, 1979 | |
| Axinulus croulinensis | (Jeffreys, 1847) | |
| Axinulus cycladius | (Wood, 1848) | |
| Axinulus eumyarius | (Sars, 1870) | Mya cleftclam |
| Axinulus redondoensis | (Burch, 1941) | |
| Axinus grandis | (Verrill & Smith, 1885) | |
| Conchocele bisecta | (Conrad, 1849) | Giant cleftclam |
| Conchocele disjuncta | Gabb, 1866 | |
| Conchocele lyuhrurngae | Lai & Jung, 2022 | |
| Genaxinus bongraini | (Lamy, 1910) | |
| Genaxinus cookianus | Fleming, 1950 | |
| Genaxinus otagoensis | (Suter, 1913) | |
| Leptaxinus ferruginosus | (Forbes, 1844) | |
| Leptaxinus incrassatus | (Jeffreys, 1876) | |
| Leptaxinus minutus | Verrill & Bush, 1898 | Minute axinopsid |
| Leptaxinus subovatus | (Jeffreys, 1881) | |
| Maorithyas flemingi | Powell, 1955 | |
| Maorithyas marama | Fleming, 1950 | |
| Mendicula carrozae | (Payne & Allen, 1991) | |
| Mendicula ferruginosa | (Forbes, 1844) | Rusty axinopsid |
| Mendicula inflata | (Payne & Allen, 1991) | |
| Mendicula ovata | (Verrill & Bush, 1898) | |
| Mendicula transversa | (Payne & Allen, 1991) | |
| Mendicula verrilli | (Payne & Allen, 1991) | |
| Parathyasira bamberi | Oliver, 2015 | |
| Parathyasira dearborni | (Nicol, 1965) | |
| Parathyasira dunbari | (Lubinsky, 1976) | |
| Parathyasira equalis | (Verrill & Bush, 1898) | Equal cleftclam |
| Parathyasira neozelanica | Iredale, 1930 | |
| Parathyasira resupina | Iredale, 1930 | |
| Spinaxinus caldarium | Oliver & Rodrigues, 2017 | |
| Thyasira alleni | Carrozza, 1981 | |
| Thyasira anassa | Oliver, 2015 | |
| Thyasira atlantica | Payne & Allen, 1991 | |
| Thyasira barbarensis | (Dall, 1890) | |
| Thyasira biplicata | (Philippi, 1836) | |
| Thyasira brevis | Verrill & Bush, 1898 | |
| Thyasira conia | Dall & Simpson, 1901 | |
| Thyasira cumingii | (Fischer, 1861) | |
| Thyasira cygnus | Dall, 1916 | |
| Thyasira debilis | (Thiele, 1912) | |
| Thyasira elliptica | Verrill & Bush, 1898 | |
| Thyasira eumyaria | Sars, 1870 | |
| Thyasira falklandica | Smith, 1885 | |
| Thyasira flexuosa | (Montagu, 1803) | Flexuose cleftclam |
| Thyasira fuegiensis | (Dall, 1890) | |
| Thyasira gouldii | (Philippi, 1845) | |
| Thyasira grandis | Verrill & Smith, 1885 | |
| Thyasira granulosa | Monterosato, 1874 | Granulose cleftclam |
| Thyasira incrassatus | (Jeffreys, 1876) | |
| Thyasira magellanica | Dall, 1901 | |
| Thyasira miyadii | Habe, 1951 | |
| Thyasira oblonga | (Monterosato, 1878) | |
| Thyasira obsoleta | (Verrill & Bush, 1898) | |
| Thyasira ovoidea | Dall, 1889 | |
| Thyasira peregrina | (Iredale, 1930) | |
| Thyasira perplicata | Salas, 1996 | |
| Thyasira planata | (Jeffreys, 1882) | |
| Thyasira pygmaea | Verrill & Bush, 1898 | |
| Thyasira rotunda | Jeffreys, 1881 | Rotund cleftclam |
| Thyasira sarsii | (Philippi, 1845) | |
| Thyasira simplex | Verrill & Bush, 1898 | Simple cleftclam |
| Thyasira southwardae | Oliver & Holmes, 2006 | |
| Thyasira striata | (Sturany, 1896) | |
| Thyasira subequatoria | Payne & Allen, 1991 | |
| Thyasira subovata | Jeffreys, 1881 | |
| Thyasira subtrigona | (Jeffreys, 1858) | |
| Thyasira succisa | (Jeffreys, 1876) | Cut-off cleftclam |
| Thyasira tokunagai | Kuroda & Habe, 1951 | |
| Thyasira tortuosa | Jeffreys, 1881 | |
| Thyasira tricarinata | Dall, 1916 | |
| Thyasira trisinuata | (d'Orbigny, 1842) | Atlantic cleftclam |
| Thyasira waikanae | Fleming, 1950 |