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

A New Subspecies of the Black Myotis (Bat) from Eastern Mexico by E. Raymond presents a crisp, authoritative account of a previously undescribed bat lineage that reshaped mid‑20th century chiropteran taxonomy. This science monograph traces how museum collections and targeted fieldwork extended the known range of Myotis nigricans northward into eastern Mexico and led to the naming of Myotis nigricans dalquesti. Listeners will hear a focused taxonomic description: the type specimen and locality, diagnostic characters (dark pelage with brownish venter, larger overall size, distinctive M1–M2 tooth morphology, a prominent P4 protostyle, and an absent sagittal crest), and careful comparisons with the neighboring subspecies M. n. extremus. The narrative situates the discovery in historical context, referencing earlier revisions of the genus and the role of mid‑20th century mammal collections from Veracruz, Tamaulipas and Chiapas. Concise and richly technical yet accessible, this audiobook is ideal for mammalogists, taxonomists, natural history students, and bat enthusiasts who want a primary‑source account of species description and biogeography. Listen to understand how meticulous morphological study and museum specimens continue to reveal biodiversity in a changing world.