Crinoidea, Cranocrinus, feeding, respiration; Greenleaf Lake, Muskogee County, Oklahoma; Island of Timor, Indonesia; Ural Mountains, U.S.S.R.; Brentwood Limestone Member = Braggs Member (part), Sausbee Formation, Morrowan, Lower Pennsylvanian; Lower Permian; Upper Permian
The cladid inadunate genus Cranocrinus Wanner is typically from Upper Permian rocks of the Island of Timor, Indonesia, and has been reported from Lower Permian rocks of the Ural Mountains of Russia. Arendt (1970) has demonstrated that juvenile C. praestans lacks radials (is pseudomonocyclic) while adult specimens have radials (are dicyclic). Both conditions are noted for C. eximius n. sp. from Morrowan (Lower Pennsylvanian) rocks of Oklahoma and are described herein. Possible methods of feeding and respiration are considered in the discussion of Cranocrinus.
Proceedings of the Iowa Academy of Science
©1978 Iowa Academy of Science, Inc.
Strimple, H. L.
"Occurrence of Cranocrinus Wanner in North America,"
Proceedings of the Iowa Academy of Science, 85(1), 21-24.
Available at: https://scholarworks.uni.edu/pias/vol85/iss1/8