1.6" Partial Ordovician Starfish (Urasterella) Fossil - Oklahoma

This is a rare, partial Middle Ordovician, fossil starfish (Urasterella sp) from the Bromide Formation of Oklahoma. It is part of a pocket that was collected some time ago (I believe decades) and very little starfish material has been recovered outside of this pocket. It's in three pieces and the larger piece is 1.6" wide.

While the species was not described the occurrence of these starfish was mentioned in the paper linked below.

Echinoderm Faunas from the Bromide Formation (Middle Ordovician) of Oklahoma