ellisi, Porotergus Alonso de Arámburu [A. S.] 1957:154, Fig. 1 [Notas del Museo de La Plata v. 19 (no. 177); ref. 12128] Lower Río Paraná, San Pedro, Buenos Aires Province, Argentina. Holotype: MLP 1-V-37-3. Paratypes: MLP 4674 [ex 11-III-46-23] (1), 4021 [ex 5-V-47-4] (1),1664 [ex 5-VI-35-34] (1). Type catalog: Miquelarena & Nadalin 2014:18 [ref. 33466]. •Valid as Porotergus ellisi Alonso de Arámburu 1957 -- (Mago-Leccia 1994:33 [ref. 21320], Gómez & Chebez 1996:56 [ref. 23791], López et al. 2003:66 [ref. 27366], Triques 2011:304 [ref. 31671]). •Valid as Apteronotus ellisi (Alonso de Arámburu 1957) -- (Albert 2001:110 [ref. 25614], de Santana 2003:8 [ref. 26978], Albert in Reis et al. 2003:498 [ref. 27061], Menni 2004:85 [ref. 28131], de Santana & Crampton 2006:115 [ref. 28765] as elisi, Koerber & Litz 2014:5 [ref. 34967], Mirande & Koerber 2015:47 [ref. 35117], Bertaco et al. 2016:422 [ref. 34561], Koerber & Litz 2016:6 [ref. 35098], Koerber et al. 2017:69 [ref. 35267], Bernt et al. 2018:473 [ref. 35797], Reis et al. 2020:463 [ref. 38364], Koerber et al. 2021:5 [ref. 38894], Koerber et al. 2023:5 [ref. 40355], Loureiro et al. 2023:84 [ref. 40506]). Current status: Valid as Apteronotus ellisi (Alonso de Arámburu 1957). Apteronotidae: Apteronotinae. Distribution: South America: Brazil, Uruguay, Paraguay and Argentina. Habitat: freshwater.