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Phacops Trilobite, from Hamar L'Aghdad Limestones, Djebel Issoumour area, Anti-Altas Mountains, Morocco (REF:PTM3)

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Phacops Trilobite, from Hamar L'Aghdad Limestones, Djebel Issoumour area, Anti-Altas Mountains, Morocco (REF:PTM3)Phacops Trilobite
from Hamar L'Aghdad Limestones, Djebel Issoumour area, Anti-Altas Mountains, Morocco
Devonian Period, 380 Million Years Old

Measurements Approx.
Height - 4.3 cm
Width - 6.1 cm
Length - 5.7 cm



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.


  

Phacops is a genus of trilobite in the order Phacopida, family Phacopidae, that lived in Europe and North America in the Silurian and Devonian periods. It was a rounded animal, with a globose head and large eyes, and probably fed on detritus (an organic material). Phacops is often found rolled up, a biological defense mechanism that is widespread among smaller trilobites but nearly perfected by this genus.


  


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