Kroh, A.; Mooi, R. (2024). World Echinoidea Database.
Porocidaris variabilis A. Agassiz & H.L. Clark, 1907. Accessed through: Glover, A.G.; Higgs, N.; Horton, T. (2024) World Register of Deep-Sea species (WoRDSS) at: https://marinespecies.org/deepsea/aphia.php?p=taxdetails&id=534646 on 2024-05-01
Glover, A.G.; Higgs, N.; Horton, T. (2024). World Register of Deep-Sea species (WoRDSS).
Porocidaris variabilis A. Agassiz & H.L. Clark, 1907. Accessed at: https://marinespecies.org/Deepsea/aphia.php?p=taxdetails&id=534646 on 2024-05-01