arcus, Leporinus Eigenmann [C. H.] 1912:300, Pl. 42 (fig. 3) [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Tukeit, Guyana. Holotype: FMNH 53366 [ex CM 1832]. Paratypes: CAS 18544 [ex IU 12122] (1); FMNH 53795 [ex CM 2296] (1). Additional original material: BMNH 1912.1.31.3 (1); CAS 61865-67 [ex IU 12119-21] (1, 1, 1); FMNH 53363-65 (1, 1, 1). Type catalog: Henn 1928:57 [ref. 12305], Ibarra & Stewart 1987:51 [ref. 12367]. •Valid as Leporinus arcus Eigenmann 1912 -- (Garavello & Britski in Reis et al. 2003:74 [ref. 27061], DoNascimiento 2016:527 [ref. 34727], DoNascimiento et al. 2017:[3] [ref. 35679], Birindelli et al. 2019:5 [ref. 36868], Taphorn et al. 2022:11 [ref. 41297]). Current status: Valid as Leporinus arcus Eigenmann 1912. Anostomidae. Distribution: South America: French Guiana, Suriname, Guyana and Venezuela. Habitat: freshwater.