MolluscaBase eds. (2024). MolluscaBase.
Portlandia subcircularis Odhner, 1960. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024) European Register of Marine Species at: http://www.marbef.org/data/aphia.php?p=taxdetails&id=543118 on 2024-07-05
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024). European Register of Marine Species.
Portlandia subcircularis Odhner, 1960. Accessed at: http://www.marbef.org/data/aphia.php?p=taxdetails&id=543118 on 2024-07-05