World Register of Marine Species (WoRMS)
Plectotropis crassiuscula E. A. Smith, 1896
MolluscaBase eds. (2026). MolluscaBase. Plectotropis crassiuscula E. A. Smith, 1896. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1350989 on 2026-08-30
Smith, E. A. (1896). On a collection of land-shells from the Islands of Selayar, Jampea, and Kalao. The Annals and Magazine of Natural History. Series 6, 18: 144–152.