planifrons, Netuma Higuchi [H.], Reis [E. G.] & Araújo [F. G.] 1982:12, Fig. 1 [Atlântica, Rio Grande do Sul v. 5; ref. 11467] Lagoa dos Patos, RS, Brazil. Holotype: MZUSP 14828. Paratypes: AMNH 48875 (4); ANSP 149293-94 (4, 3); CAS 50701 (5); FMNH 94701 (5); MCZ 58691 (5, not 4); MOFURG 80.155-157 (3, 3, 2); MZUSP 14822-25 (4), 14826-27 (2), 14829 (1), 14834-35 (2); NMC 82-061 (3); UF 32871 (5); USNM 233896 (4), 233897 (4, not 3). Type catalog: Ibarra & Stewart 1987:60 [ref. 12367], Böhlke 1984:22 [ref. 13621], Ferraris & Vari 1992:9 [ref. 19771], Ferraris 2007:44 [ref. 29155]. Additional paratypes are added on p. 15. •Valid as Netuma planifrons Higuchi, Reis & Araújo 1982 -- (Burgess & Finley 1996:165 [ref. 22901]). •Synonym of Guiritinga barbus (Lacepède 1803) -- (Kailola 2004:145 [ref. 28108]). •Valid as Genidens planifrons (Higuchi, Reis & Araújo 1982) -- (Marceniuk & Ferraris in Reis et al. 2003:450 [ref. 27061], Marceniuk & Menezes in Menezes et al. 2003:42 [ref. 27192], Marceniuk 2005:98 [ref. 28718], Marceniuk & Menezes 2007:66 [ref. 29031], Ferraris 2007:44 [ref. 29155], Marceniuk et al. 2019:434 [ref. 36658], Carvalho-Filho 2023:72 [ref. 40480], Marceniuk et al. 2023:17 [ref. 40422]). Current status: Valid as Genidens planifrons (Higuchi, Reis & Araújo 1982). Ariidae: Ariinae. Distribution: Southwestern Atlantic: Laguna dos Patos and nearby Atlantic (southern Brazil). Habitat: brackish.