Gerastos S.P. Trilobite, from Atlas Mountains, Morocco (REF:GTM6)

Gerastos S.P Trilobite, from Mountains, Morocco
360 Million Years Old, Devonian Peroid

Measurements Approx. Matrix Size
Height - 3.7 cm
Width - 5.0 cm
Length - 5.8 cm

Measurements Approx. Trilobite Size
Height - 1.3 cm
Width - 1.7 cm

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.

Gerastos has been found in the Devonian of Belgium, Germany, the Czech Republic and Morocco. 

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.

Trilobites (meaning "three lobes") are a well-known fossil group of extinct marine Arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of Arthropods. The first appearance of Trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (521 Million Years ago), and they flourished throughout the lower Palaeozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except Proetida died out. Trilobites finally disappeared in the mass extinction at the end of the Permian about 250 Million Years ago. The Trilobites were among the most successful of all early animals, roaming the oceans for over 270 million years.

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