RT info:eu-repo/semantics/article T1 Did Azara discover Myotis simus or Myotis midastacus (Mammalia: Chiroptera: Vespertilionidae) at least a century before their formal description? A1 Smith, Paul David AB The true identity of the “Chauve-Souris Onzieme ou Chauve-Souris Cannelle” of Azara (1801) and the “LXXXII Murcielago Acanelado” of Azara (1802) has never been clarified. Though it has historically been associated with the Red Myotis, Myotis ruber (É. Geoffroy St.-Hilaire, 1806), there are clear inconsistencies with that species. Unusual features of the description such as the position of the attachment of the wing membrane to the limbs confirm that the species described by Azara belongs to the Myotis simus Thomas, 1901 group. Two members of that group occur in Paraguay, from where Azara described his specimen: Myotis cf. simus and the recently described Myotis midastacus Moratelli & Wilson, 2014. Measurements and collection locality slightly favour its identity as the former, but it is not possible to conclusively state which of these species Azara had in his possession. PB Sociedade Brasileira de Zoologia SN 1984-4670 YR 2023 FD 2023-03-13 LK http://hdl.handle.net/20.500.14066/4514 UL http://hdl.handle.net/20.500.14066/4514 LA eng NO Smith, P. (2023). Did Azara discover Myotis simus or Myotis midastacus (Mammalia: Chiroptera: Vespertilionidae) at least a century before their formal description?. Zoologia (Curitiba), 40, Artículo e22046.https://doi.org/10.1590/S1984-4689.v40.e22046 NO Corresponding author: Paul Smith (faunaparaguay@gmail.com) NO Consejo Nacional de Ciencia y Tecnología DS MINDS@UW RD 30-ene-2025