Flexibilia


The Flexibles belong to the so called "Cladids", originating during the Ordivician and along with most other crinoids did not survive the Permo-Triassic extinction. Morphologically the Flexibles have a conical dicyclic cup with loosely articulating plates; uniserial arm with no pinnules; a flexible tegmen with many small plates; and a circular stem with no cirri.