Taxon - Links and literature
de Jong, Y.S.D.M. (ed.): Fauna Europaea 2.4 [http://www.faunaeur.org] [as Onthophagus nigellus (Illiger, 1803)]Data retrieved on: 9 March 2012
IUCN Red List of Threatened Species 2024-1 [47414636]
IUCN Red List of Threatened Species [http://www.iucnredlist.org/] [as Onthophagus nigellus (Illiger, 1803)]
Data retrieved on: 29 January 2024