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Iocrinus subcrassus, crinoid, Late Ordovician, McMillan Formation, Butler County, Ohio, USA - Houston Museum of Natural Science - DSC01499.JPG
Iocrinus subcrassus
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Crinoidea
Order: Diparida
Family: Iocrinidae
Genus: Iocrinus

Iocrinus is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.

Selected species[edit]