Taxon - Links and literature
IUCN Red List of Threatened Species 2024-1 [184988]
IUCN Red List of Threatened Species [http://www.iucnredlist.org/] [as Galearctus umbilicatus (Holthuis, 1977)]
Data retrieved on: 29 January 2024
Paleobiology Database [275072]
Paleobiology Database [https://paleobiodb.org/] [as Galearctus umbilicatus Holthuis, 1977]
Data retrieved on: 28 January 2018