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Unusual accessory muscle scar patterns in two species of Palaeoneilo, a paleotaxodont bivalve from the Devonian of Bolivia

Published online by Cambridge University Press:  20 May 2016

Claude Babin
Affiliation:
Centre des Sciences de la Terre, Université Lyon I, URA 11 CNRS, 69622 Villeurbanne Cedex, France
Alejandra Dalenz Farjat
Affiliation:
Yacimientos Petrolíferos Fiscales Bolivianos, CTP, Casilla 727, Santa Cruz de la Sierra, Bolivia

Abstract

New Devonian fossil material from Bolivia includes internal molds of two species of paleotaxodont bivalve, Palaeoneilo musculosa (Knod) and P. pondeana (Hartt and Rathbun), with numerous accessory muscle scars. The unusual pattern of these scars appears to have been derived from excessive splitting. These muscle scars are described and a tentative interpretation is made. An adaptative role cannot be determined with certainty and it appears that these patterns were short-lived novelties without later success.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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