eques, Chirodon Steindachner [F.] 1882:179 [Anzeiger der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftlichen Klasse v. 19 (no. 19); ref. 20487] Villa Bella and Obidos, Amazon River, Brazil. Lectotype: NMW 95056. Paralectotypes: (several) NMW 59810 (2), 62693 (6). Original genus should have been Cheirodon. Species later described in more detail in Steindachner 1882:37 [ref. 14353]. Guimarães et al. 2020:106 [ref. 37899] list a lectotype. •Valid as Hyphessobrycon eques (Steindachner 1882) -- (Weitzman & Palmer 1997:224 [ref. 22743], Weitzman & Palmer 1997:140 [ref. 24509], Britski et al. 1999:41 [ref. 24147], López et al. 2002:27 [ref. 27366], Lima & Malabarba in Reis et al. 2003:136 [ref. 27061], Casciotta et al. 2003:102 [ref. 28130], Menni 2004:77 [ref. 28131], Almirón et al. 2004:674 [ref. 27987], Almirón et al. 2006:895 [ref. 29163], Hein 2009:2 [ref. 30362], Mirande 2010:510 [ref. 31006], Sarmiento et al. 2014:47, 184 [ref. 35004], Litz & Koerber 2014:15 [ref. 33622], Bragança et al. 2015:260 [ref. 34051], Mirande & Koerber 2015:26 [ref. 35117], Pastana & Ohara 2016:396 [ref. 34716], Bertaco et al. 2016:413 [ref. 34561], Nión et al. 2016:30 [ref. 35565], Koerber et al. 2017:41 [ref. 35267], Ohara et al. 2017:10 [ref. 35494], Pastana et al. 2017:13 [ref. 35596], DoNascimiento et al. 2017:[9] [ref. 35679], Guimarães et al. 2018:82 [ref. 35965], Guimarães et al. 2019:351 [ref. 36774], Azevedo-Santos et al. 2020:5 [ref. 39606], Guimarães et al. 2020:106 [ref. 37899], Reis et al. 2020:459 [ref. 38364], Meza-Vargas et al. 2021:18 [ref. 39298], Loureiro et al. 2023:78 [ref. 40506]). •Valid as Megalamphodus eques (Steindachner 1882) -- (Melo et al. 2024:21 [ref. 41541]). Current status: Valid as Megalamphodus eques (Steindachner 1882). Acestrorhamphidae: Megalamphodinae. Distribution: South America: Amazon and Guaporé River basins (Argentina, Brazil, Bolivia, Paraguay, Peru and Uruguay). Introduced in French Guiana and other regions in Brazil. Habitat: freshwater.