Delocrinus

Delocrinus is a genus of extinct crinoids, belonging to the family Catacrinidae. Specimens have been found in Kansas, Missouri, Nebraska, Nevada, Oklahoma, Arizona, Iowa, Texas, Utah and Virginia.

Eperisocrinus missouriensis, formerly delocrinus missouriensis, was made the state fossil of Missouri in 1989.

Description
Like extant crinoids, Delocrinus species was anchored to a hard surface by a holdfast out of which grew an articulated stalk. On top of this was a calyx with a number of feather-like arms. Each arm bore short branches known as pinnules and from these cirri were extended which sifted plankton from the water flowing past.