Spelobia tenebrarum is a troglobitic sphaerocerid restricted to a large number of isolated eastern North American caves. The Quaternary origin of this species from its sister species, S. semioculata, is discussed.

The Canadian Entomologist
Department of Biology

Marshall, S.A. (Stephen A.), & Peck, S. (1985). The origin and relationships of Spelobia tenebrarum (Aldrich), a troglobitic, eastern north American, sphaerocerid fly. The Canadian Entomologist, 117(8), 1013–1015. doi:10.4039/Ent1171013-8