Luis H. Acosta SalvatierraJosé L. Poma-UreyKathrin Barboza-MarquezKathia RiveroJosé Ochoa G.Jorge Salazar‐Bravo2026-03-222026-03-22202410.15560/20.5.1054https://doi.org/10.15560/20.5.1054https://andeanlibrary.org/handle/123456789/75775Insectivorous bats of the family Vespertilionidae have been grouped into eight tribes, with Lasiurini showing an extensive distribution in South America. In Bolivia, three species of lasiurine bats have been reported: Lasiurus blossevillii (Lesson & Garnot, 1826), L. ega (Gervais, 1856), and L. villosissimus (É. Geoffroy St.-Hilaire, 1806). The morphological analyses of specimens of this genus deposited in Bolivian scientific collections and comparisons with specimens from other countries (including holotypes) prompt us to report the first records of three species: Lasiurus atratus Handley 1996, L. castaneus Handley 1960, and L. egregius (Peters, 1870) in Bolivia, expanding their known geographic ranges to the southwestern part of the Amazon.enGray (unit)ZoologyGeographyBiologyEcologyarticle