gracilis, Creatochanes Eigenmann [C. H.] 1908:106 [Bulletin of the Museum of Comparative Zoology v. 52 (no. 6); ref. 1221] Rio Tapajos, Brazil [probably from the surroundings of Santarém]. Holotype (unique): MCZ 20868. •In genus Bryconops (Machado-Allison et al. 1993:15 [ref. 22035]). •Valid as Bryconops gracilis (Eigenmann 1908) -- (Buckup in Reis et al. 2003:120 [ref. 27061], Silva-Oliveira et al. 2019:11 [ref. 36769], Silva-Oliveira et al. 2019:382 [ref. 36876], Silvano et al. 2020:69 [ref. 38133], Silva-Oliveira et al. 2021:3 [ref. 38885], Koerber et al. 2022:29 [ref. 39235], Silva-Oliveira & Lima 2024:373 [ref. 40817]). Current status: Valid as Bryconops gracilis (Eigenmann 1908). Iguanodectidae. Distribution: South America: Amazon and upper Orinoco basins (Brazil and Venezuela). Habitat: freshwater.