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 Cyphaspis stigmatophthalmus (Rud. Richter 1914)]Data retrieved on: 29 February 2020
Paleobiology Database [299399]
Paleobiology Database [https://paleobiodb.org/] [as Otarion stigmatophthalmus (Richter, 1914)]
Data retrieved on: 11 December 2015