Description: English: An Ulrichicrinus coryphaeus crinoid, Class Crinoidea, Subclass Cladida, Family Blothocrinidae, 83mm calyx and arms, collected from the Edwardsville Formation in Montgomery County, Indiana, USA, from the Middle Mississipian Carboniferous (earliest Visean). Date: 10 January 2012. Source: Own work. Author:
Dwergenpaartje.