gracilis, Chilodus Isbrücker [I. J. H.] & Nijssen [H.] 1988:54, Fig. 5 [Beaufortia v. 38 (no. 3); ref. 7319] Right bank tributary to Rio Uaupés at Trovão, about 20 kilometers upstream of mouth of Rio Uaupés, Amazonas State, Brazil. Holotype: IRSNB 760. Paratypes: IRSNB 761-763 (10, 3, 1); MCZ 21434 (4); NRM 16665 (2); ZMA 120253-54 (3, 1). •Valid as Chilodus gracilis Isbrücker & Nijssen 1988 -- (Taphorn 1992:400 [ref. 23654], Vari & Raredon in Reis et al. 2003:86 [ref. 27061], DoNascimiento et al. 2017:41 [ref. 35633]). Current status: Valid as Chilodus gracilis Isbrücker & Nijssen 1988. Chilodontidae. Distribution: Amazon River basin, Brazil and Colombia. Habitat: freshwater.