original description
(of Gaidius brevicaudatus Sars G.O., 1907) Sars, G.O. (1907). Notes supplémentaires sur les Calanoïdes de la Princesse-Alice. (Corrections et additions). Bulletin de l'Institut Océanographique, Monaco 101:1-27. (30-iv-1907) [details] 
context source (Deepsea)
Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online at http://www.iobis.org/ [details]
additional source
Markhaseva, E.L. (1996). Calanoid copepods of the family Aetideidae of the world ocean. Zoological Institute, Russian Academy of Sciences, St. Petersburg 268:1-331. [details] Available for editors 
ecology source
Brun, P., M.R. Payne & T. Kiørboe. (2017). A trait database for marine copepods. <em>Earth System Science Data.</em> 9(1):99-113., available online at https://doi.org/10.5194/essd-9-99-2017 [details] Available for editors 
From editor or global species database