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Oldest record of peduncular attachment of brachiopods to crinoid stems, Upper Ordovician, Ohio, U.S.A. (Brachiopoda; Atrypida: Echinodermata; Crinoidea)

Published online by Cambridge University Press:  20 May 2016

Michael R. Sandy*
Affiliation:
Department of Geology, University of Dayton, 300 College Park, Dayton, Ohio 45469-2364, U.S.A.

Extract

A hand-specimen, bedding-plane sample of limestone (wackestone) from the Upper Ordovician Waynesville Formation has numerous brachiopod specimens (at least 60) exposed on its surface (Figure 1). The brachiopods have been identified as members of the atrypid species Zygospira modesta (Say in Hall) 1847 (the type species of the genus Zygospira Hall, 1862) and are concentrated in an area measuring approximately 9 cm x 2 cm. A wide range of specimen sizes from juvenile to adult are present and are believed to represent a brachiopod life-assemblage (Figure 2).

Type
Paleontological Notes
Copyright
Copyright © The Paleontological Society 

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