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 Eomonorachus deloi Roy 1941]Data retrieved on: 29 February 2020
Lemke U. (2019): Catalogue of the available names and non available names of the species and subspecies for the class Trilobita [as Pterygometopus callicephalus brevis Roy 1941]Data retrieved on: 3 March 2020
Lemke U. (2019): Catalogue of the available names and non available names of the species and subspecies for the class Trilobita [as Calliops brevis Ulrich & Delo in Delo 1940]Data retrieved on: 3 March 2020
Paleobiology Database [177370]
Paleobiology Database [https://paleobiodb.org/] [as Calliops brevis (Roy, 1941)]
Data retrieved on: 1 April 2020