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Two pelobatid frogs from the Tertiary of North America and their relationships to fossil and Recent forms

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By: Zweifel, Richard George, - Clark, John, - Alexander, Annie Montague, - Kellogg, Louise Phelps,

Publication info: New York, N.Y, American Museum of Natural History, [1956]

Holding Institution: American Museum of Natural History Library

Subjects: 56.76(118:7) Amphibians, Fossil Anura Anura, Fossil Eopelobates grandis Evolution Fish Lake Watershed Nevada North America Oligocene Paleontology Pelobatidae Pennington County Pliocene Scaphiopus alexanderi South Dakota