Cepphus
| Cepphus | |
|---|---|
 | |
| Black guillemot ( Cepphus grylle) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Charadriiformes |
| Family: | Alcidae |
| Genus: | Cepphus Pallas, 1769 |
| Type species | |
| Cepphus lacteolus Pallas, 1769 | |
| Species | |
|
Cepphus grylle | |
Cepphus is a genus of seabirds in the auk family also referred to as guillemots by association with the related genus Uria, or tysties, from the Old Norse name for C. grylle.