Taxon - Links and literature
Lemke U. (2019): Catalogue of the available names and non available names of the species and subspecies for the class Trilobita [as Geragnostus (Geragnostus) crassus Tjernvik 1956]Data retrieved on: 27 February 2020
Lemke U. (2019): Catalogue of the available names and non available names of the species and subspecies for the class Trilobita [as Geragnostus (Geragnostus) crassus Tjernvik 1956]