Original description of the genus by Kiel & del Carmen Perrilliat, 2001:
- "High spired aporrhaid shell with irregular, weak and slightly curved axial ribs. They may be crossed by fine spiral lines in the upper half of the whorl. A band of callus extends from the inner lip onto the spire and may cover the apex."
Mexopus species are
- Mexopus mexicanus Kiel & del Carmen Perrilliat, 2001
- Mexopus robustus Kiel & del Carmen Perrilliat, 2001