Levinson, S.A. (1951). Thin sections of Paleozoic Ostracoda and their bearing on taxonomy and morphology. Journal of Paleontology. 25(5): 553-560.

216947

Levinson, S.A.

1951

25(5): 553-560

Publication

https://www.jstor.org/stable/1299899

Available for editors   [request]

The study of thin sections of Paleozoic and Tertiary ostracodes reveals that some forms possess shells of many layers, in contrast to the one-layer shell of most fossil ostracodes. Both the genus Eridoconcha and the new genus Cryptophyllus exhibit a many-layered shell which appears to be formed by the retention of molts. It is proposed that the cohesion of these molts is not dependent on the shape of the carapace but is a specialized adaptation of generic importance. The genera Eridoconcha and Cryptophyllus are included in the family Primitiidae. The genera Leperditia and Isochilina, in thin section, reveal a layer of shell internal to the primary layer which commonly is restricted to the dorsal and ventral margins of the valve. The significance of the secondary layer can not be definitely established at present.

Ostracoda

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