| Permocalculus Temporal range: | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota |
| Supergroup: | Archaeplastida |
| Division: | Rhodophyta |
| Class: | incertae sedis |
| Family: | †Gymnocodiaceae |
| Genus: | †Permocalculus G. F. Elliott, 1955 |
Permocalculus is a genus of red algae known from Permian to Cretaceous strata. Closely aligned to Gymnocodium, it is placed in the Gymnocodiaceae.