| Valid name | Carapus |
| Synonym | Gender: M; Indice d'Ittiologia siciliana: 57 |
| Synonym | Carapus Rafinesque, 1810 |
| Synonym | Vexillifer Gasco, 1870, by monotypy). |
| Synonym | Diaphasia Lowe, 1843, Proc. zool. Soc. Lond.: 92 (type: Gymnotus acus Brünnich 1768, by original designation). |
| Synonym | Type: Gymnotus acus L., by subsequent designation Int. Comm. zool. Nomen., 1912 and Jordan, 1917: 73. |
| Synonym | Fierasfer Oken, 1817, Isis: 1182 (type: Ophidium imberbe Cuvier, 1815, by monotypy). |