Gerastos
| 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 | |
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.[3]
Distribution
[edit]Gerastos has been found in the Devonian of Belgium, Germany, the Czech Republic and Morocco.[3]
Description
[edit]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.[4][5]
Length rarely exceeds 3 cm.[citation needed]
References
[edit]- ↑ van Viersen, A. P. (2021). "Type and other species of Gerastos and allied genera (Trilobita, Proetinae) from the Siluro-Devonian". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 299 (2): 185–217. doi:10.1127/njgpa/2021/0964. ISSN 0077-7749. S2CID 233910967.
- 1 2 Allart P. van Viersen; Peter Taghon; Benedikt Magrean (2019). "Early Middle Devonian trilobites and events in the Nismes – Vireux-Molhain area, southern border of the Dinant Synclinorium (Belgium, northern France)". Geologica Belgica. 22 (1–2): 7–33. doi:10.20341/gb.2019.001.
- 1 2 3 "Fossilworks: Hollardops". fossilworks.org. Retrieved 17 December 2021.
- ↑ Van Viersen, Allart; Prescher, Harald (2008-10-31). "Devonian Proetidae (Trilobita) from the Ardennes Massif (Belgium, N France) and the Eifel Hills (W Germany)". Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre. 78: 9–29.
- ↑ Gibb, Stacey; Chatterton, Brian (2010-01-01). "Gerastos (Order Proetida; Class Trilobita) from the Lower to Middle Devonian of the southern Moroccan Anti-Atlas region". Palaeontographica Canadiana. 29: 1–89.
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