†Crassimarginatidae Fryda, Blodgett & Lenz 2002

Fryda, Blodgett & Lenz 2002. New early Devonian gastropods from the families Crassimarginatidae (new family) and Scoliostomatidae (new family), Royal Creek area, Yukon Territory, Canada. Journal of Paleontology, 76(2), Mar 2002: 246-255