original description
(of Asellus extensolingualus Fleming, 1972) Fleming, L. E. (1972). The evolution of the eastern North America isopods of the genus <i>Asellus</i> (Crustacea: Asellidae). Part I. <em>International Journal of Speleology.</em> 4: 221-256. [details] Available for editors
basis of record
Schotte, M., B.F. Kensley & S. Shilling. (1995 onwards). World list of Marine, Freshwater and Terrestrial Crustacea Isopoda. National Museum of Natural History Smithsonian Institution: Washington D.C., USA - no longer online. [website archived on 2018-01-25]. [details]
From editor or global species database
type locality Missouri, USA [details]