On the variation, distribution and evolutionary history of Myotis armiensis (Chiroptera, Vespertilionidae) along Neotropical mountain ranges

A recent study reveals that the bat species Myotis armiensis, found in the Talamanca Range-La Amistad Reserves and other Neotropical mountain ranges, may comprise two distinct evolutionary lineages. Using a combination of morphological analysis, genetic sequencing (cytochrome b), and ecological niche modeling, researchers identified reciprocal monophyly between populations in Central America's Talamanca Cordillera and those in the South American Andes and Venezuela's Cordillera de La Costa. These populations exhibit significant genetic divergence (>3%) and morphometric variation, suggesting Pleistocene diversification driven by glacial cycles. While the findings hint at potential cryptic species, further research is needed to confirm their taxonomic status.

Novaes, R. L. M., Guimarães-Silva, M. A., Caccavo, A., Wilson, D. E., Weksler, M., & Moratelli, R. (2026). On the variation, distribution and evolutionary history of Myotis armiensis (Chiroptera, Vespertilionidae) along Neotropical mountain ranges. Mammalian Biology, 106(3), 537–552. https://doi.org/10.1007/s42991-026-00563-w