Red Declivolithus Trilobite - Great Detail

This is a dark red specimen of the Trinucleid trilobite Declivolithus from Morocco. Specimens this nice are hard to find, as most are compressed and missing much of the surface detail. It is very inflated and has a natural, dark red preservation due to the oxidiation of iron pyrite which had replaced the fossil. The specimen is 1.4" wide.

This trilobite has really dramatic cephalic pits along it's "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