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Muscle scars and mode of life of Carinaropsis (Bellerophontoidea, Gastropoda) from the Ordovician of Tennessee

Published online by Cambridge University Press:  20 May 2016

John S. Peel
John S. Peel*
Affiliation:
Institute of Earth Science–Paleontology, Uppsala University, Norbyvägen 22, S-752 36 Uppsala, Sweden
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Abstract

Muscle scars are described for the first time in the Ordovician bellerophontoidean gastropod Carinaropsis Hall. Silica replicas from the Cannon Limestone of Tennessee preserve a pair of muscle scars, with a single elongate scar located on each umbilico-lateral angulation of the shell interior more than half a whorl back from the apertural margin. The scars are similar in general shape and position to muscle scars described in Bellerophon de Montfort and the pleurotomarioidean Porcellia woodwardi (Sowerby). In addition to supporting the soft parts within the widely expanded shell, the characteristic internal septum of Carinaropsis probably facilitated clamping of the shell aperture against the substrate.

Type
Research Article
Information
Journal of Paleontology , Volume 67 , Issue 4 , July 1993 , pp. 528 - 534
Copyright
Copyright © The Paleontological Society 

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