| Cephalonyx | |
|---|---|
| Line drawing reconstruction of the species Cephalonyx sibiriens | |
| Scientific classification | |
| Domain: | Eukaryota |
| (unranked): | †Acritarcha |
| Genus: | †Cephalonyx Weiss, 1984 |
Cephalonyx is a genus of filamentous acritarchs known from the Precambrian and early Cambrian (and possibly other times).