Crinoid

Dendrocrinus caduceus

• Ordovician
• Liberty Formation
• Preble County, Ohio, USA

Size: 7 cm crown

A spectacular crown of a rare dendrocrinid crinoid endemic to the Ordovician of Ohio and Indiana. Dendrocrinus caduceus is a rather unusual member of its genus that possesses relatively thick, robust proximal arms which taper rapidly and exhibit dense heterotomous (i.e. asymmetrical) branching (Meek 1873).