This sea lily is found only in Ordovician sediments of the Bromide Formation of Oklahoma, where it is a relatively rare component of crinoid assemblages (Sprinkle, 1982). The wide conical cup of this crinoid is somewhat similar to that of Dendrocrinus, but the noteworthy feature of this species is its pinnulate arms. Each of the five rays consists of two stout and unbranched arms, made of uniserial plates bearing heavy uniserial pinnules (Brower & Veinus, 1982). The proximal part of the stem is round. It was a member of the taller group of feeders. Like all crinoids, it was blind.

References:

Brower, J. & Veinus, J., 1982. ‘Long-Armed Cladid Inadunates’, in Sprinkle, J. (ed.) Echinoderm Faunas from the Bromide Formation (Middle Ordovician) of Oklahoma. Lawrence: The University of Kansas Paleontological Institute, pp. 129-144.

Sprinkle, J., 1982. ‘Echinoderm Zones and Faunas’, in Sprinkle, J. (ed.) Echinoderm Faunas from the Bromide Formation (Middle Ordovician) of Oklahoma. Lawrence: The University of Kansas Paleontological Institute, pp. 47-56.