A New Subspecies of the Black Myotis (Bat) from Eastern Mexico

Authors describe and name a previously unrecognized subspecies of the black myotis from eastern Mexico, providing type specimen data, geographic range, diagnostic external and cranial characters, and comparative distinctions from neighboring subspecies. They present measurements for multiple males and females, cranial figures, and note patterns of variation and limited intergradation at contact zones. Distributional limits and specimen localities are listed, and the authors acknowledge collectors and funding sources. The account concludes with specimen totals examined and brief remarks on northernmost records and morphological differences supporting the subspecies designation.