Taxon - Odkazy a literatura
IUCN Red List of Threatened Species 2024-1 [184988]
IUCN Red List of Threatened Species [http://www.iucnredlist.org/] [jako Galearctus umbilicatus (Holthuis, 1977)]
Datum citace: 29. leden 2024
Paleobiology Database [275072]
Paleobiology Database [https://paleobiodb.org/] [jako Galearctus umbilicatus Holthuis, 1977]
Datum citace: 28. leden 2018