Taxonomic Notes on Mexican Bats of the Genus Rhogeëssa

"Taxonomic Notes on Mexican Bats of the Genus Rhogeëssa" by E. Raymond Hall is a scientific work that provides a classification of different types of Rhogeëssa bats in Mexico during the 1950s. Hall's writing looks closely at the bats' traits and where they live to sort them into particular groups. The text takes place in areas like Sonora and Veracruz, and it talks in detail about species called "Rhogeëssa parvula", "Rhogeëssa tumida", and "Rhogeëssa gracilis". With an approach that involves comparing various bat samples that exist in collections, Hall proposes a new idea; it is that slight differences between species found in different places might mean many are actually types of a single species.