Camerata (Crinoidea) The Camerata or camerate crinoids are an extinct subclass of Paleozoic stalked crinoids. They originated during the Early Ordovician, reached their maximum diversity during the Mississippian and became extinct during the Permian–Triassic extinction event. Anatomically, they are distinguished by: fused junctions between the plates of the cup brachial plates incorporated into the cup tegmen forming a rigid roof over the mouth no less than ten and sometimes a very large number of free arms, often pinnulate References External links Camerata in the Paleobiology Database Category:Devonian crinoids Category:Late Devonian animals Category:Carboniferous crinoids Category:Silurian crinoids Category:Middle Devonian first appearances Category:Late Devonian extinctions