rosaceus, Hyphessobrycon Durbin [M. L.] 1909:67 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1166] Gluck Island, Essequibo River, Guyana (a river island at about 6°00' to 6°05'N, 58°36'W). Holotype: FMNH 52791 [ex CM 1190]. Paratypes: (26) BMNH 1911.10.31.410-411 (2); CAS 61755 [IU 11768] (4); FMNH 7352 (2), 52792-94 (5, 1, 2); MVZ [=MCZ] 30038 (2); CAS-SU 21919 (2); USNM 66194 [ex CM] (2); ZMA 101013 (1). Type catalog: Henn 1928:66 [ref. 12305], Böhlke 1953:24-25 [ref. 12291], Nijssen et al. 1982:20 [ref. 19236], Ibarra & Stewart 1987:48 [ref. 12367], Vari & Howe 1991:27 [ref. 19022]. •Valid as Hyphessobrycon rosaceus Durbin 1909 -- (Weitzman & Palmer 1997:229 [ref. 22743], Weitzman & Palmer 1997:145 [ref. 24509], Weitzman & Palmer 1997:153 [ref. 24506], Weitzman & Palmer 1997:158 [ref. 24508], Lima & Malabarba in Reis et al. 2003:139-140 [ref. 27061], Hein 2009:9 [ref. 30362], Pastana et al. 2017:13 [ref. 35596], Guimarães et al. 2020:106 [ref. 37899], Taphorn et al. 2022:16 [ref. 41297]). •Valid as Megalamphodus rosaceus (Durbin 1909)-- (Melo et al. 2024:21 [ref. 41541]). Current status: Valid as Megalamphodus rosaceus (Durbin 1909). Acestrorhamphidae: Megalamphodinae. Distribution: South America: Essequibo, Corantijn and Suriname River basins (Guyana and Suriname). Habitat: freshwater.