alpha, Bryconamericus Eigenmann [C. H.] in Eigenmann, Henn & Wilson 1914:7 [Indiana University Studies No. 19; ref. 1259] Villavicencio, Río Orinoco system, Colombia. Holotype: FMNH 56646 [ex CM 5463]. Paratypes: (6) CAS 18511 [ex IU 13157] (5), FMNH 56646-47 (1, 1). Non-types: BMNH 1924.3.3.39-40 (2) Barriyona. Type catalog: Henn 1928:62 [ref. 12305], Ibarra & Stewart 1987:17 [ref. 12367]. •Valid as Bryconamericus alpha Eigenmann 1914 -- (Román-Valencia 1999:112 [ref. 24922], Román-Valencia 2003:26 [ref. 27037], Román-Valencia 2003:7 [ref. 27070], Silva in Reis et al. 2003:115 [ref. 27061], Román-Valencia 2002:209 [ref. 27206], Román-Valencia 2003:23, 37 [ref. 26840], Román-Valencia 2005:46 [ref. 28949], Román-Valencia et al. 2008:24 [ref. 29743], Román-Valencia et al. 2008:1749 [ref. 30068] with wrong authorship, Román-Valencia et al. 2009:1 [ref. 30393], Zarske et al. 2010:9 [ref. 30816], Mirande 2010:536 [ref. 31006], Román-Valencia 2010:201 [ref. 31063]). •Valid as Knodus alpha (Eigenmann 1914) -- (Thomaz et al. 2015:App. 5 [ref. 33893], DoNascimiento et al. 2017:58 [ref. 35633], Urbano-Bonilla et al. 2018:89 [ref. 35773], Ferreira 2024:210 [ref. 40817]). Current status: Valid as Knodus alpha (Eigenmann 1914). Stevardiidae: Diapominae. Distribution: South America: Orinoco River basin, Colombia and Venezuela. Habitat: freshwater.