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A new family of trepostome bryozoans from the Ordovician Simpson Group of Oklahoma

Published online by Cambridge University Press:  14 July 2015

Marcus M. Key Jr.
Marcus M. Key Jr.*
Affiliation:
Department of Geology, Dickinson College, Carlisle, Pennsylvania 17013
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Abstract

A new family, Bimuroporidae, is proposed for a clade of Ordovician trepostome bryozoans. The family is united by several characteristics, including a zooidal ontogenetic progression from mesozooid to autozooid and an integrate wall structure. Discriminant and cladistic analyses of colonies from the Ordovician Simpson Group outcropping in the Arbuckle Mountains and Criner Hills of south-central Oklahoma permit the recognition of eight species belonging to this family. Four species assigned to the new genus Bimuropora are described: B. dubia (Loeblich), B. pollaphragmata n. sp., B. conferta (Coryell), and B. winchelli (Ulrich), as well as four species assigned to the genus Champlainopora Ross: C. chazyensis (Ross), C. ramusculus n. sp., C. pachymura (Loeblich), and C. arbucklensis n. sp.

Type
Research Article
Information
Journal of Paleontology , Volume 64 , Issue 5 , September 1990 , pp. 700 - 724
Copyright
Copyright © The Paleontological Society 

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