Distributional records of mammals from the southwestern Yucatan Peninsula of Mexico

Abstract

Records of mammals are reported for the Mexican states ofCampeche and Tabasco on the Yucatan Peninsula. New distributional records include: Uroderma bilobatum, and Micronycteris megalotis from Campeche; and Myotis e/egans, Sylvilagus floridanus, Ileteromys gaumeri, and Oryzomys fulvescens from Tabasco. Additional information also is provided on the occurrence of Cryptotis nigrescens in Campeche and Rhynchonycteris naso in eastern Tabasco. Based on specimens reported in this study, the southwestemmost limit of the Yucatan Biotic Province, as it applies to mammals, is defined as that area of Tabasco north of the Sierra del Norte de Chiapas and east of the Rio Usumacinta.