Description

Anomalocaridid appendage
Ordovician
Upper Fezouata Formation
Zagora, Morocco

47mm appendage from an undescribed anomalocaridid on 66mm slab.

Arthropod.  Anomalocarid.

Anomalocaridids belong to a group of early arthropods best known from the Cambrian but survived into the Ordovician.  At a time when an unusually-large animal was 12 inches long, at least one genus, Anomalocaris, reached over 3 feet in length.