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A New Subspecies of the Black Myotis (Bat) from Eastern Mexico
In 1928 when Miller and Allen (Bull. U. S. Nat. Mus., 144) published their revisionary account of American bats of the genus Myotis, the black myotis, Myotis nigricans, was known no farther north than Chiapas and Campeche. Collections of mammals made in recent years for the Museum of Natural History of The University of Kansas include specimens of M. nigricans from eastern Mexico as far north as Tamaulipas. Critical study of this newly acquired material reveals that it pertains to an hitherto unnamed subspecies that may be named and described as follows: Type.Male, adult, skin and skull, No. 23839 Museum of Natural History, University of Kansas; from 3 km. E of San Andrs Tuxtla, 1000 ft., Veracruz; obtained on January 5, 1948, by Walter W. Dalquest, original No. 8444. Comparison.Color almost as in Myotis nigricans extremus, the subspecies occurring adjacent to dalquesti in Chiapas and Tabasco. From M. n. extremus, dalquesti differs as follows: larger; hypocone in M1 and M2 broader making posterointernal part less rounded; protostyle of P4 prominent instead of absent; P3 in line with C and P2 instead of displaced lingually; sagittal crest absent instead of present posteriorly. Myotis nigricans nigricans and M. n. dalquesti are of approximately equal size; otherwise they differ in the same features as do extremus and dalquesti. ......Buy Now (To Read More)
Ebook Number: 27022
Author: Alvarez, Ticul
Release Date: Oct 24, 2008
Format: eBook
Language: English
Contributor (Author): Hall, E. Raymond (Eugene Raymond), 1902-1986
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