marauna, Tembeassu Triques [M. L.] 1998:6, Figs. 1-3 [Revue française d'Aquariologie Herpétologie v. 25 (no. 1/2); ref. 23407] Ilha Solteira, Rio Paraná, Mato Grosso do Sul State, Brazil, about 20°30'S, 51°00'W. Holotype: MZUSP 48510. Paratypes: MZUSP 23090 (2). Type catalog: Ferraris et al. 2017:[15] [ref. 35236]. •Valid as Apteronotus marauna (Triques 1998) -- (Albert 2001:110 [ref. 25614], de Santana 2003:8 [ref. 26978], Albert in Reis et al. 2003:499 [ref. 27061]). •Valid as Tembeassu marauna Triques 1998 -- (Campos-da-Paz 2005:395 [ref. 28359], Triques 2011:304 [ref. 31671], Reis et al. 2016:14 [ref. 34496], Ferraris et al. 2017:[15] [ref. 35236], Bernt et al. 2018:475 [ref. 35797], Peixoto et al. 2019:6 [ref. 37127]). Current status: Valid as Tembeassu marauna Triques 1998. Apteronotidae: Apteronotinae. Distribution: South America: upper Paraná River basin (Brazil). Habitat: freshwater.