Agaricocrinus

Agaricocrinus is a genus of extinct crinoids, belonging to the family Coelocrinidae.

These stationary upper-level epifaunal suspension feeders lived in the Carboniferous period and in the Osagean age of United States, from 353.8 to 345.0 Ma.

Selected species

 * Agaricocrinus americanus Roemer
 * Agaricocrinus splendens Miller and Gurley

Description
Like extant crinoids, Agaricocrinus 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.