Gerastos
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Extinct genus of trilobites
| Gerastos | |
|---|---|
| Gerastos tuberculatus from Morocco | |
| Gerastos sp. from Morocco | |
| Scientific classification Edit this classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| 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.[2]
It was described by Goldfuss in 1843.[2]
Distribution
[edit ]Gerastos has been found in the Devonian of Belgium, Germany, the Czech Republic and Morocco.[2]
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.[3] [4]
Length rarely exceeds 3 cm.[citation needed ]
References
[edit ]- ^ a b 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 .
- ^ a b c "Fossilworks: Hollardops". fossilworks.org. Retrieved 17 December 2021.
- ^ Van Viersen, Allart; Prescher, Harald (2008年10月31日). "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年01月01日). "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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