ibicuhiensis, Cheirodon interruptus var. Eigenmann [C. H.] 1915:74 [Memoirs of the Carnegie Museum v. 7 (no. 1); ref. 1231] Cacequy [Cacequi], Rio Ibicuí, Rio Grande do Sul, Brazil. Syntypes: CAS-SU 17515 [ex CM 6816] (1), FMNH 57833 [ex CM 6816] (7), 98573 [ex FMNH 57833] (1). Type catalog: Böhlke 1953:23 [ref. 12291], Ibarra & Stewart 1987:23 [ref. 12367]. Lectotype listed as FMNH 57883 [ex 6861] by Malabarba in Reis et al. 2003:216 [ref. 27061] but does not meet the requirements of the 1999 Code unless the code is emended. •Valid as Cheirodon ibicuhiensis Eigenmann 1915 -- (Malabarba 1989:133 [ref. 14217], Casciotta et al. 1992:10 [ref. 21059], Malabarba 1998:215 [ref. 23844], Malabarba in Reis et al. 2003:216 [ref. 27061], Mantinian et al. 2008:38 [ref. 34297], Miquelarena et al. 2008:61 [ref. 29829], Koerber 2011:2 [ref. 31122], Koerber 2014:3 [ref. 33621], Litz & Koerber 2014:11 [ref. 33622], Mirande & Koerber 2015:19 [ref. 35117], Bertaco et al. 2016:413 [ref. 34561], Petry et al. 2016:301 [ref. 34966], Nión et al. 2016:28 [ref. 35565], Loureiro et al. 2023:59 [ref. 40506]). Current status: Valid as Cheirodon ibicuhiensis Eigenmann 1915. Characidae: Cheirodontinae. Distribution: South America: Laguna dos Patos, Uruguay and Tramandaí River basins (Argentina, Brazil and Uruguay). Habitat: freshwater, brackish.