Pteronotus alitonus is a medium-sized bat in the Mormoopidae family, measuring 5.8 to 6.4 cm and weighing between 20 and 26 g. It is easily confused with P. rubiginosus, for which characteristics of the skull and dentition should be seen in detail (Pavan et al., 2018). The coat is dense and short (6 mm), ranging from light brown and dark brown to reddish.