| Valid name | Simenchelys |
| Synonym | Gender: F; Bull. Essex Inst., 11: 27 |
| Synonym | Simenchelys (Gill, MS) Goode and Bean,1879, |
| Synonym | Type: S. parasiticus (Gill, MS) Goode and Bean, 1879, by monotypy. |
| Synonym | Conchognathus Collett, 1889, Bull. Soc. zool. Fr., 14: 123 (type: C. grimaldii Collett 1889, by monotypy). |