World Register of Marine Species (WoRMS)
Biddulphia spinosa (J.W.Bailey) Boyer, 1927
Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2026). DiatomBase. Biddulphia spinosa (J.W.Bailey) Boyer, 1927. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=149657 on 2026-08-29
Bailey, J.W. (1844). Account of some new Infusorial forms discovered in the fossil Infusoria from Petersberg, Va., and Piscataway, Md. American Journal of Science, 46: 137-141, 1 pl.