pygmaeus, Potamophylax Myers [G. S.] & Carvalho [J. de P.] in Myers 1955:7 [Tropical Fish. Magazine. Mar. 1955; ref. 3126] Middle Amazon, Lagoa de Borba, lower Rio Madeira, Município de Borba, 4°24'S, 59°35'W, Amazonas, Brazil. Syntypes: MNRJ 4216 (1), 14160 (7); CAS-SU 50196 (3). Redescribed by Roberts 1970:6 (Figs. 1-2) [ref. 30566] as Fluviphylax pygmaeus. See Lucinda & Lucena 2012:56 [ref. 32068] for information on type specimens. •Valid as Fluviphylax pygmaeus (Myers & Carvalho 1955) -- (Parenti 1981:515 [ref. 7066], Costa 1996:128 [ref. 22572], Wildekamp 1996:144 [ref. 23649], Lazara 2001:121 [ref. 25711], Lucinda in Reis et al. 2003:558 [ref. 27061], Souza et al. 2011:412 [ref. 31782], Lucinda & Lucena 2012:56 [ref. 32068], DoNascimiento et al. 2017:102 [ref. 35633], Bragança 2018:134 [ref. 36227]). Current status: Valid as Fluviphylax pygmaeus (Myers & Carvalho 1955). Fluviphylacidae. Distribution: South America, Amazon River basin: Brazil, Colombia and Venezuela. Habitat: freshwater.