ignotus, Creagrutus Vari [R. P.] & Harold [A. S.] 2001:122, Fig. 48 [Smithsonian Contributions to Zoology No. 613; ref. 25842] Riacho (small stream) 1, tributary To Rio Preto at road to San Francisco, Município de Diamantino (Rio Arinos basin), Mato Grosso, Brazil. Holotype: MZUSP 45310. Paratypes: MZUSP 42456 (3), 45349 (3), 50165 (2); USNM 326672 (3, 1 c&s), 340960 (3). •Valid as Creagrutus ignotus Vari & Harold 2001 -- (Vari & Harold in Reis et al. 2003:123 [ref. 27061], Dagosta & Pastana 2014:580 [ref. 33181], Mirande et al. 2013:763 [ref. 33366], Thomaz et al. 2015:Add. 5 [ref. 33893], Netto-Ferreira & Moreira 2018:255 [ref. 35759]). Current status: Valid as Creagrutus ignotus Vari & Harold 2001. Stevardiidae: Creagrutinae. Distribution: Upper Tapajós River and Xingu River basin, Brazil. Habitat: freshwater.