| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Elofsonella Pokorny 1955 | 1 | 0 | 0 |
| Elofsonella concinna (Jones 1857) Pokorny 1955 | 0 | 0 | 1 |
| Elphidiella Cushman 1936 | 2 | 0 | 0 |
| Elphidiella arctica (Parker & Jones 1864) | 0 | 0 | 1 |
| Elphidiella groenlandica (Cushman 1933) | 0 | 0 | 1 |
| Elphidiidae | 3 | 0 | 0 |
| Elphidium Montfort 1808 | 5 | 0 | 0 |
| Crassostrea gryphoides | 0 | 0 | 1 |
| Elphidium bartletti Cushman 1933 | 0 | 0 | 1 |
| Elphidium excavatum | 0 | 0 | 1 |
| Elphidium hallandense Brotzen 1943 | 0 | 0 | 1 |
| Lopha costata | 0 | 0 | 1 |
| Entolium membranaceum | 1 | 0 | 0 |
| Myoida | 0 | 0 | 1 |
| Ennucula Iredale 1931 | 2 | 0 | 0 |
