leptokeras, Phalloceros Lucinda [P. H. F.] 2008:126, Figs. 15-17 [Neotropical Ichthyology v. 6 (no. 2); ref. 29669] Rio São Francsico, tributary to rio Paquequer, Fazanda São Franciosco de Paula, ca. 22°02'S, 42°47"W, Sapucaia, Rio de Janeiro, Brazil. Holotype: MNRJ 23606. Paratypes: MCP 30512 (6, 4 c&s), 13736 (3); MNRJ 14497 (8), 15525 (2), 22509 (36), 22510 (5). Species epithet is a noun in apposition. •Valid as Phalloceros leptokeras Lucinda 2008 -- (Meyer 2015:184 [ref. 34698], Huber 2019:88 [ref. 36941], Souto-Santos et al. 2022:[11] [ref. 39460]). Current status: Valid as Phalloceros leptokeras Lucinda 2008. Poeciliidae: Poeciliinae. Distribution: South America: coastal river drainages (São Paulo and Rio de Janeiro States, Brazil.). Habitat: freshwater.