Alexander, C I. (1934). Ostracoda of the genera Monoceratina and Orthonotacythere from the Cretaceous of Texas. Journal of Paleontology, 8 (1), 57-67

211924

Alexander, C. I.

1934

8 (1), 57-67

Publication

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The shell characters of the genera Monoceratina and Orthonotacythere are described in detail. The probable evolution of the hinge teeth in the family Cytheridae from a simple hinge struc?ture like that of Monoceratina is outlined. It is suggested that Monoceratina may be the direct ancestor from which the subfamilies Cytherurinae, Loxoconchinae, Bythocytherinae, and pos?sibly the Cytherinae were derived, and that since this genus does not appear to be a likely an?cestor for the other subfamilies of the family Cytheridae, this family may be, as at present arranged, polyphletic. Nine species of Monoceratina (five new), and four species of Orthonotacy?there (three new) are described and figured.

America, North

Biodiversity, Taxonomic and ecological diversity
Paleontology, Fossils, Paleobiology

Ostracoda

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