Iowa Devonian Crinoids; Shellrock Formation Crinoids; Glossocrinus goldringae; Cerasnwcrinus springeri; Hexacrinus springeri
Well preserved crinoids from the Shellrock Formation (Upper Devonian) of Iowa are extremely rare. Several well preserved specimens collected by one of us (Levorson) have led to new generic assignments of the species originally described as Nassoviocrinus goldringae Belanski, 1928, to Glossocrinus goldringae, n. comb., and of Hexacrinus springeri Thomas to Cerasmocrinus springeri, n. comb. The latter is the type species of Cerasmocrinus, new genus.
Proceedings of the Iowa Academy of Science
©1973 Iowa Academy of Science, Inc.
Strimple, Harrell L. and Levorson, C. O.
"Additional Crinoid Specimens from the Shellrock Formation (Upper Devonian) of Iowa,"
Proceedings of the Iowa Academy of Science, 80(4), 182-184.
Available at: https://scholarworks.uni.edu/pias/vol80/iss4/9