Abstract

Banded chromosomes were studied from the monotypic genus Otonycteris and compared to the Saharo-Arabian representative of the genus Plecotus ( P. austriacus christii ). These data, which indicate Otonycteris is a plecotine bat, were used to construct a phylogenetic tree for the five genera of long-eared vespertilionid bats. Two groups of long-eared bats were recognized according to shared-derived fusions since diverging from the primitive Myotis-Eptesicus lineage; Idionycteris and Euderma share four derived centric fusions, and Otonycteris, Barbastella , and Plecotus share five derived centric fusions. Otonycteris was derived from the Plecotus-Barbastella lineage by two rearrangements that reduced the chromosome number to 28.

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