compressus, Hemigrammus Meek [S. E.] 1904:87, Fig. 25 [Field Columbian Museum, Zoölogical Series v. 5; ref. 2958] Río Papaloapam basin at El Hule, Oaxaca, Mexico. Holotype: FMNH 4641. Paratypes: BMNH 1905.12.6.4-5 (2); FMNH 4642 (17), 4662 (11) 105930 [ex FMNH 4642] (2); MCZ 29911 [ex IU 11126] (2); MHNG 2181.076 (1) [ex FMNH]; USNM 55728 [ex FMNH] (2). Type catalog: Ibarra & Stewart 1987:44 [ref. 12367], Vari & Howe 1991:24 [ref. 19022]. •Valid as Hyphessobrycon compressus (Meek 1904) -- (Gamboa Pérez 1992:318 [ref. 38704], Espinosa Pérez et al. 1993:25 [ref. 22290], Greenfield & Thomerson 1997:77 [ref. 22947], Weitzman & Palmer 1997:225 [ref. 22743], Zarske & Géry 1997:310 [ref. 23715], Almirón & Casciotta 1999:344 [ref. 24405], Lima & Malabarba in Reis et al. 2003:135 [ref. 27061], Nelson et al. 2004:81 [ref. 27807], Miller 2006:157 [ref. 28615], García-Alzate et al. 2008:48 [ref. 29671], García-Alzate & Román-Valencia 2008:13 [ref. 30008], Malabarba et al. 2012:49 [ref. 31810], García-Alzate et al. 2013:183 [ref. 32440], García-Alzate et al. 2013:861 [ref. 32692], Page et al. 2013:81 [ref. 32708], Dagosta et al. 2014:366 [ref. 33382], Barrientos et al. 2015:4 [ref. 37653], Carvalho & Malabarba 2015:514 [ref. 34032], García-Alzate et al. 2017:126 [ref. 35253], Pastana et al. 2017:13 [ref. 35596], Guimarães et al. 2019:351 [ref. 36774], Guimarães et al. 2020:106 [ref. 37899], Lima et al. 2022:263 [ref. 39116], Barrientos et al. 2023:271 [ref. 41235], Elías et al. 2023:3 [ref. 39863], Page et al. 2023:77 [ref. 40505], Quintana 2024:5 [ref. 41186]). Current status: Valid as Hyphessobrycon compressus (Meek 1904). Acestrorhamphidae: Hyphessobryconinae. Distribution: Southern North America and central America: Atlantic slope rivers and streams (southern Mexico, Belize and Guatemala). Habitat: freshwater.