Eperisocrinus missouriensis, formerly Delocrinus missouriensis, was made the state fossil of Missouri in 1989.[2]
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.[3]
