Double Declivolithus Trilobite Specimen - Mecissi, Morocco

This is a pair of large Declivolithus trilobites from the Lower Ktaoua Formation of Morocco. They have a natural, orange preservation due to the oxidiation of iron pyrite which had replaced the fossil. The specimen on the left has significant restoration to it's headshield, hence the lowoer price.

This trilobite has really dramatic cephalic pits along its "head shield". It's unknown the exact purpose of these pits, they could have had sensory purposes or aided in filter feeding.

An Upper Ordovician (Katian) Trilobite Fauna From the Lower Ktaoua Formation, Morocco

About Trilobites

Trilobites are an extinct class of marine arthropods that thrived for nearly 270 million years, from the early Cambrian to the end of the Permian period (around 521 to 252 million years ago). They are one of the most successful and diverse groups in the history of life, with over 25,000 described species spanning a wide range of sizes, shapes, and ecological niches. Known for their distinctive, segmented exoskeletons, trilobites provide invaluable insights into the evolutionary history of arthropods and the dynamics of ancient marine ecosystems.

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