camerate latin loan-word

The Camerata or camerate crinoids are an extinct subclass of Paleozoic stalked crinoids.

While the inherited camerate portion of the internal skeleton (see below) was of aragonite, the evolutionarily novel rostrum was composed of calcite.

Stephen K. Donovan and David N. Lewis The mid-Palaeozoic camerate crinoid Scyphocrinites Zenker in southwest England

The posterior interradius may indicate that all crinoids had homologous plating in the posterior interray rather than the camerate posterior interray being distinct from other crinoids.