Taxon - Links and literature
The Interim Register of Marine and Nonmarine Genera [1062384]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [as Nilegna Öpik, 1967]
Data retrieved on: 29 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 Nilegna ÖPIK, 1967]Data retrieved on: 11 October 2011