Dendrocrinus cf. villosus

This sea lily was found in the Middle Ordovician Bromide Formation of Oklahoma, a unit known for its abundant content of crinoid fossils. This sea lily grew to about 15-20 cm (6-8 inches) and this height placed it at the intermediate tier of suspension feeders. This species is very rare in the Bromide Formation (Brower & Veinus, 1982), and its stalk has a distinctive pentalobate shape in its most proximal part.

Reference:

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.