quadrimaculatus, Hemiodus Pellegrin [J.] 1909:343 [2] [Bulletin du Muséum National d'Histoire Naturelle (Série 1) v. 14 (no. 7)[1908]; ref. 3423] Camopi River, French Guiana. Lectotype: MNHN 1901-0394. Paralectotypes: MNHN 1901-0395 to 0397 (1, 1, 1), FMNH (1, missing). Type catalog: Bertin 1948:37 [ref. 19577], Ibarra & Stewart 1987:45 [ref. 12367]. On p. 2 of separate. Lectotype selected by Géry 1964 [ref. 2150]. •Valid as Hemiodopsis quadrimaculatus (Pellegrin 1909) -- (Géry et al. 1991:20 [ref. 21021], Planquette et al. 1996:100 [ref. 22818]). •Valid as Hemiodus quadrimaculatus Pellegrin 1909 -- (Langeani 1999:721 [ref. 23914], Langeani in Reis et al. 2003:98 [ref. 27061], Langeani & Moreira 2013:1261 [ref. 32535], Melo et al. 2016:132 [ref. 34701] dated 1908, Nogueira et al. 2020:[5] [ref. 38050], Silva et al. 2020:179 [ref. 37389], Taphorn et al. 2022:25 [ref. 41297]). Current status: Valid as Hemiodus quadrimaculatus Pellegrin 1909. Hemiodontidae. Distribution: Northern South America: Brazil, French Guiana, Guyana and Suriname. Habitat: freshwater.