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Transposed Hinge Structures in Lamellibranchs

Popenoe, W. P. and Findlay, W. A. (1933) Transposed Hinge Structures in Lamellibranchs. Transactions of the San Diego Society of Natural History, 7 (26). pp. 299-318. ISSN 0080-5947.

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In the course of study of a collection of Eocene fossils from Claiborne Bluff, Alabama, the senior author of this paper noticed two valves, one right and one left, of the lamellibranch Venericardia parva Lea, in which the dentition is partially transposed. Subsequently, the authors made an examination of more than five thousand lamellibranch valves, representing both recent and fossil shells, in search of further examples of hinge-transposition. We have found a total number of twenty-six valves exhibiting this variation. Study of these specimens has revealed some hitherto unreported facts regarding the principles of hinge-transposition. Therefore in this paper, we shall describe and discuss these specimens, and shall present such conclusions as seem justified by the data assembled. Citations to the literature are made by author, date, and page, referring to the list at the end of the paper.

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Additional Information:© 1933 San Diego Society of Natural History. Read before the Pacific Coast Section, Paleontological Society of America, April 8, 1933, Los Angeles.
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Other Numbering System NameOther Numbering System ID
Balch Graduate School of the Geological Sciences102
Issue or Number:26
Record Number:CaltechAUTHORS:20200117-105421849
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100790
Deposited By: Tony Diaz
Deposited On:17 Jan 2020 19:09
Last Modified:17 Jan 2020 19:09

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