heterorhabdus, Tetragonopterus Ulrey [A. B.] 1894:610 [American Naturalist v. 28 (no. 331); ref. 12356] Pará, Brazil [probably the outskirts of Belém]. Syntypes: (several) CAS 44415 [ex IU 5496] (9), 44416 [ex IU 5500] (6); CAS-SU 2174 (1). Type catalog: Böhlke 1953:27 [ref. 12291]. Species was also described as new in Ulrey 1895:286 [ref. 12371]. •Valid as Hyphessobrycon heterorhabdus (Ulrey 1894) -- (Zarske & Géry 1998:20 [ref. 23983], Lasso et al. 2001:95 [ref. 25928] as cf. heterorhabdus, Lima & Malabarba in Reis et al. 2003:137 [ref. 27061], Zarske & Géry 2004:36 [ref. 28039], García-Alzate et al. 2008:48 [ref. 29671], García-Alzate et al. 2008:140 [ref. 29919], García-Alzate & Román-Valencia 2008:15 [ref. 30008], García-Alzate et al. 2010:39 [ref. 30724], García-Alzate et al. 2010:55 [ref. 30716], García-Alzate et al.2010:801 [ref. 30824], García-Alzate et al. 2011:709 [ref. 31266], García-Alzate et al. 2013:861 [ref. 32692], Barriga Salazar 2014:107 [ref. 35745], Lima et al. 2014:177 [ref. 33535], Marinho et al. 2014:263 [ref. 33372], Sarmiento et al. 2014:184 [ref. 35004], García-Alzate et al. 2015:223 [ref. 33855], Dagosta et al. 2016:258 [ref. 34377], García-Alzate et al. 2017:126 [ref. 35253], Moreira & Lima 2017:133 [ref. 35562], DoNascimiento et al. 2017:50 [ref. 35633], Careaga et al. 2020:75 [ref. 37774] as gr. heterorhabdus, Faria et al. 2020:282 [ref. 37838], Faria et al. 2021:1 [ref. 38179], Koerber et al. 2022:34 [ref. 39235]). Current status: Valid as Hyphessobrycon heterorhabdus (Ulrey 1894). Acestrorhamphidae: Hyphessobryconinae. Distribution: South America: lower Amazon River basin (eastern Pará to the rio Curuá-Una basin and rio Cupari drainage, Tapajós River basin), Brazil. Habitat: freshwater.