World Register of Marine Species (WoRMS)
Aporrhais pespelecani var. bifida Coen, 1931
MolluscaBase eds. (2026). MolluscaBase. Aporrhais pespelecani var. bifida Coen, 1931. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=753700 on 2026-08-24
Coen G. (1931). Alcune forme anormali della Aporrhais pes pelecani Linneo. Annali del Museo Civico di Storia Naturale di Genova 55: 142-146, pl. 2-3