Covers at least 200,000 sq km. 3 published localities + 3 in BOLD. Huckett, H.C., 1934. A revision of the North American species belonging to the genus Coenosia Meigen and related genera (Diptera: Muscidae). Part I. The subgenera Neodexiopsis, Coenosia, Hoplogaster and related genera Allognota, Bithoracochaeta and Schoenomyza. Transactions of the American Entomological Society (1890-), 60(1), pp.57-119.; BOLD.