delta, Knodus Géry [J.] 1972:56, Pl. 3 (fig. 2) [Acta Humboldtiana (Series Geologica, Palaeontologica et Biologica Nr. 2) No. 2; ref. 1595] Creek near Puerto Napo, upper Río Napo, Ecuador. Holotype: ZMH H1473. Paratypes: MNHN 1980-1444 (1), ZMH H1473a (5). Type catalog: Wilkens 1977:156 [ref. 22013]. •Valid as Bryconamericanus delta (Géry 1972) -- (Román-Valencia et al. 2009:2 [ref. 30393], Barriga S. 2012:106 [ref. 35745] with author as Román-Valencia 2000). •Valid as Knodus delta Géry 1972 -- (Silva in Reis et al. 2003:143 [ref. 27061], Ferreira & Lima 2006:635 [ref. 28919], Román-Valencia et al. 2013:127 [ref. 32807], Barriga Salazar 2014:107 [ref. 35745], Thomaz et al. 2015:Add. 5 [ref. 33893], Deprá et al. 2021:24 [ref. 38180]). Current status: Valid as Knodus delta Géry 1972. Stevardiidae: Diapominae. Distribution: South America: upper Amazon River basin, Ecuador. Habitat: freshwater.