New records of chromatic and osteological anomalies for Neotropical bats (Chiroptera: Vespertilionidae)

Abstract This study reports five new records of anomalies in three species of widely distributed bats of the family Vespertilionidae. In Eptesicus taddeii , two individuals exhibited piebaldism, one at the wing tips while another on the dorsal region of the neck. In Eptesicus brasiliensis we observed a mandibular anomaly where the angular process was positioned horizontally at a 45-degree angle. In Myotis nigricans , one individual presented a shortened tail, while another was missing half the proximal phalanx and a distal phalanx. Documenting these unusual traits enhances our understanding of their prevalence and variability in natural populations.