Once a fourth genus is recognized, certain phylogenetic problems disappear and a reasonable zoogeographic interpretation is possible for Middle American leptodactylid distribution. [Please select]
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SPECIES OF QUESTIONABLE OCCURRENCE Some species for which there are no authentic records from Michoacán can be expected there on zoogeographic probability. [Please select]
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ZOOGEOGRAPHIC COMMENTS Of the 53 mammals listed in the foregoing accounts, all but one (_Mus musculus_) are native North American species. [Please select]
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The avifauna is not depauperate owing to the exclusion of any one of the three major zoogeographic stocks thought to be important in the development of the present North American avifauna (Mayr, 1946). [Please select]
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