MolluscaBase eds. (2021). MolluscaBase. Ungulinidae Gray, 1854. Accessed through: Glover, A.G.; Higgs, N.; Horton, T. (2021) World Register of Deep-Sea species (WoRDSS) at: https://www.marinespecies.org/deepsea%20/aphia.php?p=taxdetails&id=220 on 2023-03-27
Glover, A.G.; Higgs, N.; Horton, T. (2023). World Register of Deep-Sea species (WoRDSS). Ungulinidae Gray, 1854. Accessed at: https://marinespecies.org/deepsea/aphia.php?p=taxdetails&id=220 on 2023-03-27