This is a Premium Grade natural association of 6 Ordovician aged starfish of the genus Ophiura and Petraster in a large plate. It comes from the Tioririne Formation near Blekus, South Morocco. The specimens shows an amazing amount of detail and the natural, orange coloration is due to the oxidization of iron pyrite. Completely natural. Awesome Museum Grade mortality plate. SPECIES Ophiura, Lamarck 1801 (brittle star) 12 individuals AGE Ordovician (~460 Million Years) LOCATION Kaid Rami, South Morocco FORMATION Kataoua Formation Size (plate): 25 cm and 8cm the biggest Ophiura Ref: C28 All our fossils comes with Certificate of Authenticity.