| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Nanocassiope alcocki (Rathbun, 1902) |
Indo-West Pacific | ||
| Nanocassiope oblonga Davie, 1995 |
Eastern Central Pacific | ||
| Nanocassiope truncatifrons (Rathbun, 1898) |
Western Central Atlantic |