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Shell orientation terminology among the Bivalvia (Mollusca): Problems and proposed solutions

Published online by Cambridge University Press:  14 July 2015

Jack Bowman Bailey
Jack Bowman Bailey*
Affiliation:
Department of Geology, Western Illinois University, Macomb 61455,
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Extract

Traditional terms used to describe shell orientation in bivalves are unsatisfactory in three important ways: 1) for poorly known bivalve taxa, unbiased and directionally neutral terms are sometimes needed to replace anterior and posterior where data are incomplete; 2) there is a striking absence of simple terms to apply to the long and short ends of the shell; and 3) the term lateral is either incorrectly or inconsistently applied. in the following discussion, I shall explore each of these issues and suggest remediation.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 83 , Issue 3 , May 2009 , pp. 493 - 495
Copyright
Copyright © The Paleontological Society 

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References

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