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Avicularia-like structures in a Paleozoic fenestrate bryozoan

Published online by Cambridge University Press:  14 July 2015

F. K. McKinney
F. K. McKinney*
Affiliation:
Department of Geology, Appalachian State University, Boone, North Carolina 28608
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Abstract

Structures that mimic the general shape of cheilostome avicularia occur within the Paleozoic fenestrate bryozoan genus Fenestrapora. These structures, here termed aviculomorphs, are isolated within laminar extrazooidal skeleton and are characterized by an elongate triangular outline that surrounds a shallow, concave pit. The acute tip of the triangular structure was elevated above the general level of the surrounding skeleton, as is the case for many avicularia. The aviculomorphs could not have functioned precisely as do avicularia, but like avicularia they are inferred to have had a thickened cuticular mandible that matched the skeletal base and to have been able to articulate the mandible open and closed along a fulcrum on the short side of the triangular skeletal outline.

Type
Research Article
Information
Journal of Paleontology , Volume 72 , Issue 5 , September 1998 , pp. 819 - 826
Copyright
Copyright © The Paleontological Society 

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