| Valid name | Guentherus |
| Synonym | Type: Guentherus altivela Osorio, by monotypy. |
| Synonym | Guentherus Osorio, 1917 |
| Synonym | Gender: M; Arch. Univ. Lisboa, 4: 117-118 |
| Synonym | Anodontus Cervigon, 1961, Inv. Pesq., 19: 119-125, fig. 14 (type: Anodontus mauritanicus Cervigon by monotypy). |
| Synonym | Melanogloea Barnard, 1941, Ann. Rep. S. Afr. Mus. 1940 in Barnard, 1948: 356-358 fig. 5 (type: Melanogloea ventralis |