Articulata (Crinoidea)

Articulata Temporal range: Triassic–recent PreꞒ Ꞓ O S D C P T J K Pg N
A passion flower feather star (Ptilometra australis)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Crinoidea
Subclass:	Articulata
Orders
Comatulida Cyrtocrinida Hyocrinida Isocrinida †Encrinida †Holocrinida †Millericrinida †Roveacrinida †Uintacrinida

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 entoneural system. Articulata first appeared in the fossil record during the Triassic period although other, now extinct crinoid groups, originated in the Ordovician.^[1]