1.8" Prone Harpes (Scotoharpes) Trilobite - Boudib, Morocco

Here is a prone, 1.8" long, Harpes (Scotoharpes) trilobite from Boudib, Morocco on the NE side of Jebel Issoumour. It has a very dramatic "head shield" which is often interpreted as a mechanism to help it stay on top of a soft ocean floor. This preglabellar ring (head shield) is covered in many sensory pits which may have held hairlike features when the trilobite was alive.

This is a very nice specimen with excellent preparation and shell detail. These trilobites are rarely found prone like this one, the tail is almost always curled underneath.

Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet: over 25,000 species have been described, filling nearly every evolutionary niche. Due in large part to their hard exoskeletons (shells), they left an excellent fossil record.
Harpes (Scotoharpes) aff. perradiatus
Boudib, Morocco
El Otfal Formation
1.8" long, rock 4.5 x 2.2"
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