original description
Souza, L. A.; Lemos de Castro, A. (1991). The genus Circoniscus Pearse 1917 in Brazil, with a description of three new species (Isopoda Oniscidea Scleropactidae). <em>Tropical Zoology.</em> 4: 45-64. [details]
original description
(of Circoniscus gracilidens Souza & Lemos de Castro, 1991) Souza, L. A.; Lemos de Castro, A. (1991). The genus Circoniscus Pearse 1917 in Brazil, with a description of three new species (Isopoda Oniscidea Scleropactidae). <em>Tropical Zoology.</em> 4: 45-64. [details]
basis of record
Schotte, M., B.F. Kensley & S. Shilling. (1995 onwards). World list of Marine, Freshwater and Terrestrial Crustacea Isopoda. National Museum of Natural History Smithsonian Institution: Washington D.C., USA - no longer online. [website archived on 2018-01-25]. [details]
additional source
Schmidt, C. (2007). Revision of the neotropical Scleropactidae. <em>Zoological Journal of the Linnean Society.</em> 151(Supplement 1): 1-339., available online at https://doi.org/10.1111/j.1096-3642.2007.00286.x [details] Available for editors 
From editor or global species database
type locality Brazil [details]