| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Cepphus carbo Pallas, 1811 |
Spectacled guillemot | Northwest Pacific | 38 |
| Cepphus columba Pallas, 1811 |
Pigeon guillemot | Eastern Pacific and the Arctic | 35 |
| Cepphus grylle (Linnaeus, 1758) |
Black guillemot | Northern Atlantic and the Arctic | 36 |