World Register of Marine Species (WoRMS)
MolluscaBase eds. (2026). MolluscaBase. Orpiella sororum (Clapp, 1923). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1343493 on 2026-08-01
Clapp, W.F. (1923). Some Mollusca from the Solomon Islands. Bulletin of the Museum of Comparative Zoology, 65 (11): 351-418, 5 pls.