Jenkins, PaulinaSealy, Spencer G2025-04-112025-04-112022-03-152021-11-16Paulina D. Jenkins and Spencer G. Sealy. 2022. The problems of resolving historical specimen data, focusing on a specimen of Myotis austroriparius (Mammalia, Chiroptera, Vespertilionidae) collected by Thomas Drummond. Canadian Journal of Zoology. 100(5): 281-295. https://doi.org/10.1139/cjz-2021-02110008-430110.1139/cjz-2021-0211http://hdl.handle.net/10141/623283The geographical itineraries of Thomas Drummond’s two separate expeditions to Canada (1825–1827) and the United States of America (1831–1835) are used to provide historical context for the specimens collected and their localities. The coordinates for these locations are estimated and their geographical positions mapped. The difficulties of resolving various problems with historical specimens are explored and several examples are provided, including the contentious origin and identification of a southeastern myotis, Myotis austroriparius (Rhoads, 1897) (NHMUK 1837.4.8.127). Information about type specimens is discussed and the geographical position of several type localities of rodents and a mustelid in the Rocky Mountains and a lagomorph in the USA are refined.enopenAccessJournal Article1480-3283Canadian Journal of Zoology2025-03-271005281-295mammalssoutheastern myotisMyotis austroripariushistorical type specimensCanadaUSADrummondmorphology