Taxon - Odkazy a literatura
druh
Portlandia arctica Gray, 1824
Paleobiology Database [86131]
Paleobiology Database [https://paleobiodb.org/] [jako Portlandia arctica (Gray, 1824)]
Datum citace: 28. leden 2018
Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [jako Portlandia arctica Gray, 1824]Datum citace: 23. listopad 2013