Athenacrinus n. gen. and other early echinoderm taxa inform crinoid origin and arm evolution

Thomas E. Guensburg, James Sprinkle, Rich Mooi, Bertrand Lefebvre, Bruno David, Michel Roux, Kraig Derstler

Specimens Cited:  SUI 49484    SUI 62895A    SUI 62895C    SUI 80030    SUI 80173