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A 験 sTRAer Muarv, Rosear W. Paleobiogeography and genetir differentiation of the Baja California herpetofauna. Occasional Papers of the California Academy of Sciences, No. 137, 48 pages, 21 figures, 11 ubles. 1953.-The evolutionary of the ians and reptiles of North America are examined. using a synthesis of plate tectonics, paleogeography, and paleoecology. There is a very sırong correlation between the nonbiological and the biological factors

The foliowing zoogeographic scenario is congruent with both factors. During the Miocene, about 13 miliion years before present (MYBP), the Cape area of Baja California broke away from mainland Mexico near the state of Colima. Mexico. Plate movements yielded isolated subpopulations, one on the Cape area (or associaued islands) arid the other ing on the mai This division js termed J. The islands that formed the Cape area of Baja California are postulated to be …