21167 - Top Rare Anomalocaridid Aegirocassis benmoulai filter feeding appendage Ordovician Mammites nodosoides The texture is porphyritic

The texture is porphyritic

This specimen has a fresh cut to see its internal texture

abundant in the Devonian of North Africa

Huge specimen

Ypresian and “Euclastes group” elements

21167 - Top Rare Anomalocaridid Aegirocassis benmoulai filter feeding appendage Ordovician Mammites nodosoides The texture is porphyriticTop rare filter feeding appendage of the anomalocaridid Aegirocassis benmoulai Aegirocassis is an extinct genus of anomalocarid arthropod belonging to the family Hurdiidae that lived 480 million years ago during the early Ordovician. It is known by a single species, Aegirocassis benmoulai. A fossil of A. benmoulai from the Fezouata biota, Morocco was discovered by and named after Mohamed Ben Moula, a fossil collector who recognized its rare