| Gryphaeidae Vialov, 1936 |
| Hyotissa Stenzel, 1971 |
| Hyotissa hyotis (Linnaeus, 1758) |
| Hyotissa mcgintyi (Harry, 1985) |
| Hyotissa quercinus (G. B. Sowerby II, 1871) |
| Neopycnodonte Stenzel, 1971 |
| Neopycnodonte cochlear (Poli, 1795) |
| Parahyotissa Harry, 1985 |
| Parahyotissa mcgintyi Harry, 1985 |
| Pycnodonteinae Stenzel, 1959 |