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Intraspecific Chromosome Variation In The Bat, Macrotus Waterhousii Gray

1968; Oxford University Press; Volume: 49; Issue: 4 Linguagem: Inglês

10.2307/1378730

1545-1542

Walter A. Nelson‐Rees, Alexis J. Kniazeff, Robert J. Baker, James L. Patton,

Animal Ecology and Behavior Studies

The karyotypes of two subspecies of bat, Macrotus waterhousii Gray (Phyllostomatidae), have been studied and compared. Specimens of M. water¬housii mexicanus from Morelos and Guerrero, Mexico, as well as specimens in one sample of M. waterhousii californicus from Sonora, had a karyotype with a diploid number of 46 including a telocentric Y-chromosome in the male complement. An¬other sample of M. waterhousii californicus from Sonora, as well as samples from Arizona and California, had a diploid number of 40. Of these samples, the Arizona specimens also revealed a telocentric Y-chromosome and in addition a secondary constriction on the supposed X-chromosome, whereas the California sample was characterized by a pronounced achromatic region near the centromere on one of the large pairs of telocentric chromosomes and the existance of a meta or submetacentric Y-chromosome in the male. This appears to be the first major karyo type variation of bats reported at the subspecific level.