Type species: Hippothoa gigerium Ryland & Gordon, 1977
| Synonyms | Author | Type species |
|---|---|---|
| Atacama | Morris, 1980 | Atacama foramina Morris, 1980 |
This genus includes the species:
| (Wood, 1844) | Pliocene | SE England | WoRMS 1412954 | |
| Moyano & Gordon, 1980 | Recent | Chile | WoRMS 467515 | |
| Tilbrook, Hayward & Gordon, 2001 | Recent | Vanuatu | WoRMS 467516 | |
| Hayward, 1993 | Recent | Antarctica | WoRMS 467517 | |
| Moyano & Gordon, 1980 | Recent | Chile | WoRMS 467518 | |
| Gordon, 2020 | Recent | South Pacific - New Zealand | WoRMS 1424629 | |
| (Viviani, 1977) | Recent | S. America | WoRMS 467520 | |
| (Morris, 1980) | U. Pliocene | Chile | WoRMS 1412955 | |
| Gordon, 2020 | Recent | South Pacific - Australia East coast | WoRMS 1424630 | |
| (Ryland & Gordon, 1977) | Recent | Europe | WoRMS 111401 | |
| (Ryland & Gordon, 1977) | Recent | New Zealand | WoRMS 467521 |