Ordovician Brittle Star & Carpoid Fossil Association - Morocco

This is a nice association of two different types of echinoderm fossils from the Ordovician aged
Kataoua Formation of Morocco. There is a very detailed, 1.8" wide brittle star (Ophiura sp) as well as a 3" long carpoid. The bright orange coloration is natural and due to the oxidization of iron pyrite. There is a couple of repaired cracks in the rock.

Comes with an acrylic display stand.

Carpoids are bizarre and somewhat controversial invertebrates - they are extinct, early echinoderms (living examples are starfish, sea urchins and sea lilies). Carpoids first appeared in the fossil record in the Cambrian Period with some types surviving into the Carboniferous Period.

They are an enigma to scientists and much has yet to be learned as to exactly how these creatures lived. Because they are so unlike other echinoderms, carpoids are now placed within the subphylum, Homalazoa. This is due to the fact they lack radial symmetry and an obvious hydrovascular system. However, like echinoderms, carpoids possess a calcite skeleton made up of plates in a three-dimensional mesh called a stereom.

The carpoids may be related to the most primitive chordates or vertebrates and are ancestral to the more advanced echinoderms.
Ophiura sp. & unidentified
Kaid rami, Morocco
Kataoua Formation
Brittlestar 1.8", Carpoid 3", rock 7x4.6"
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