Taxon - Links and literature
Paleobiology Database [21612]
Paleobiology Database [https://paleobiodb.org/] [as Josephulus Warburg, 1925]
Data retrieved on: 14 December 2015
The Interim Register of Marine and Nonmarine Genera [1069582]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [as Josephulus Warburg, 1925]
Data retrieved on: 30 November 2019
Jell P. A., Adrain J. M. (2002): Available generic names for trilobites, Memoirs of the Queensland Museum 48(2): 331-553. Brisbane. ISSN0079-8835. [as Josephulus WARBURG, 1925]Data retrieved on: 11 October 2011