Description

Early Ordovician (Arenigian)

Upper Fezouata Formation

Zagora, Morocco

16mm carpoid on 49mm slab

Carpoid,

Carpoids are an extinct group that most paleontologists consider to be early echinoderms while others argue they could be primitive chordates.

This specimen comes from a time relatively early in their history.  They died out during the Devonian Period.