World Register of Marine Species (WoRMS)
MolluscaBase eds. (2026). MolluscaBase. Ficula filius (O. Meyer, 1885)&nbsp;&#8224;. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1664923 on 2026-08-30
Meyer, O. (1885). The genealogy and the age of the species in the southern Old-Tertiary. The American Journal of Science. Series 3, 29: 457-468.