[1] One of the locations from which Agaricocrinus americanus is known is the Edwardsville Formation, in the vicinity of Crawfordsville, Montgomery County, Indiana, in the United States.

In this fossil-rich bed have been found the fossils of sixty species of crinoid, distributed among more than forty genera.

It is thought that the various species had different length stalks so that they could capture plankton drifting past at various heights above the substrate.

[3] Like extant crinoids, Agaricocrinus americanus was anchored to a hard surface by a holdfast out of which grew an articulated stalk.

Each arm bore short branches known as pinnules and from these cirri were extended which sifted plankton from the water flowing past.