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Middle Ordovician carrier shell Lytospira (Mollusca, Gastropoda) from Alaska

Published online by Cambridge University Press:  20 May 2016

David M. Rohr
David M. Rohr*
Affiliation:
Department of Geology, Sul Ross State University, Alpine, Texas 79832
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Abstract

The euomphalacean gastropod Lytospira gerulus n. sp. is described from the Middle Ordovician of west-central Alaska. The species is among the oldest known carrier shell specimens, and also shows evidence of repaired shell breakage; the breakage may have been the result of unsuccessful predation attempts. The interior of the shell shows an unusual spiral groove and ridges that may have been associated with the animal's retractor muscle. This internal groove may be an overlooked feature of all species of Lytospira.

Type
Research Article
Information
Journal of Paleontology , Volume 67 , Issue 6 , November 1993 , pp. 959 - 962
Copyright
Copyright © The Paleontological Society 

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