A Sympatric Cryptic Species of Mammal: A New Species of Rhogeessa (Chiroptera: Vespertilionidae)

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Abstract
A new species of bat from the genus Rhogeessa [R. genowaysi ] is described, which would not have been recognized as distinct if the karyotypes had not been available. The discovery of this species clearly documents that it is possible for 2 sympatric species of mammals to be so similar in external and cranial morphology that without chromosomal, genic or some other data, a researcher would never realize a local sample contained more than a single biological species.