collettii, Tetragonopterus Steindachner [F.] 1882:179 [Anzeiger der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftlichen Klasse v. 19 (no. 19); ref. 20487] Hyavary, Brazil; Obidos, Amazon River, Brazil. Syntypes: (several) ?MCZ 20843 (42) Obidos, ?MCZ 90154 [ex MCZ 20840a] (3) Obidos; NMW 57379-82 (3, 3, 2, 5). Species later illustrated and described in more detail in Steindachner 1882:33, Pl. 7 (fig. 3) [ref. 14353]. Spelled colletii in original description, which was obviously a mistake; corrected to collettii by Steindachner 1882:33 [ref. 14353]. •Valid as Moenkhausia collettii (Steindachner 1882) -- (Ortega & Vari 1986:9 [ref. 9708] as colletti, Taphorn 1992:269 [ref. 23654], Planquette et al. 1996:295bis [ref. 22818], Lasso et al. 2001:96 [ref. 25928], Benine in Reis et al. 2003:146 [ref. 27061], Barriga Salazar 2014:108 [ref. 35745], Sarmiento et al. 2014:185 [ref. 35004], Marinho et al. 2015:576 [ref. 33708], Petrolli et al. 2016:168 [ref. 34395], Melo et al. 2016:133 [ref. 34701], Soares & Bührnheim 2016:399 [ref. 34972], DoNascimiento et al. 2017:51 [ref. 35633], Meza-Vargas et al. 2021:19 [ref. 39298], Borstein et al. 2022:16 [ref. 39507], Taphorn et al. 2022:17 [ref. 41297], Marinho & Benine 2024:225 [ref. 40817]). •Valid as Hemigrammus collettii (Steindachner 1882) -- (Melo et al. 2024:24 [ref. 41541]). Current status: Valid as Hemigrammus collettii (Steindachner 1882). Acestrorhamphidae: Pristellinae. Distribution: South America: Amazon basin (Bolivia, Brazil, Bolivia, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela). Habitat: freshwater.