Gerastos
Extinct genus of trilobites
From Wikipedia, the free encyclopedia
Gerastos is a genus of proetid trilobite in the family Proetidae that lived between the Pragian and Eifelian of the Lower-Middle Devonian, spanning approximately 21 million years.[2]
| Gerastos Temporal range: | |
|---|---|
| |
| Gerastos tuberculatus from Morocco | |
 | |
| Gerastos sp. from Morocco | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | †Artiopoda |
| Class: | †Trilobita |
| Order: | †Proetida |
| Family: | †Proetidae |
| Genus: | †Gerastos Goldfuss, 1843 |
| Species | |
Distribution
Gerastos has been found in the Devonian of Belgium, Germany, the Czech Republic and Morocco.[2]
Description
Gerastos has holochroal eyes situated to the side of its enlarged glabella region of the cephalon. The surface of the cephalon can be smooth or covered with pustules.[3][4]
Length rarely exceeds 3 cm.[citation needed]
