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There then followed a selective mass extinction at the end of the Permian period, during which all blastoids and most crinoids became extinct. [28] After the end-Permian extinction, crinoids never regained the morphological diversity and dominant position they enjoyed in the Paleozoic; they employed a different suite of ecological strategies ...
Pentacrinites is an extinct genus of crinoids that lived from the Hettangian to the Bathonian of Asia, Europe, North America, and New Zealand.Their stems are pentagonal to star-shaped in cross-section and are the most commonly preserved parts. [1]
The earliest crinoid may have been Echmatocrinus, the fossilised remains of which have been found in the Burgess Shale, but some authorities do not accept it as a crinoid. Bourgueticrinids first appeared in the fossil record during the Triassic period, although other crinoid groups, now extinct, originated in the Ordovician.
Articulata are a subclass or superorder within the class Crinoidea, including all living crinoid species. They are commonly known as sea lilies (stalked crinoids) or feather stars (unstalked crinoids). The Articulata are differentiated from the extinct subclasses by their lack of an anal plate in the adult stage and the presence of an ...
Cyathocrinites is an extinct genus of crinoids that lived from the Early Silurian to the Late Permian in Europe and North America. Sources
The Camerata or camerate crinoids are an extinct subclass of Paleozoic stalked crinoids.They were some of the earliest crinoids to originate during the Early Ordovician, reached their maximum diversity during the Mississippian, and became extinct during the Permian–Triassic extinction event. [2]
Actinocrinites (from Greek: ἀκτίς aktís, 'ray' and Greek: κρίνω krino 'to perceive') [2] is an extinct genus of crinoids. Fossil records
Eucalyptocrinites is an extinct genus of crinoid that lived from the Silurian to the Middle Devonian. Its remains have been found in Asia , Australia , Europe , and North America . Sources