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Growth Lamellae on the Type Species of the Upper Paleozoic Bivalve Aviculopecten M'Coy

J. B. Waterhouse
Journal of Paleontology
Vol. 43, No. 5 (Sep., 1969), pp. 1179-1183
Stable URL: http://www.jstor.org/stable/1302428
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Growth Lamellae on the Type Species of the Upper Paleozoic Bivalve Aviculopecten M'Coy
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Abstract

Growth lamellae on the left valve of the type species of Aviculopecten M'Coy are shown to swing ventrally in interspaces between costae, not dorsally as stated by Newell (1938). Therefore the genus is possibly closely allied to Limipecten Girty (1904). Some of the species referred by Newell (1938) to Aviculopecten should be reassigned to Heteropecten Kegel & Costa (1951) and some of the others to Etheripecten Waterhouse (1963).

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