marmoratus, Ageneiosus Eigenmann [C. H.] 1912:206, Pl. 22 (fig. 1) [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Creek below Potaro Landing, Guyana. Holotype (unique): FMNH 53245 [ex CM 1710]. Type catalog: Henn 1928:74 [ref. 12305], Ibarra & Stewart 1987:6 [ref. 12367], Ferraris 2007:69 [ref. 29155]. •Valid as Ageneiosus marmoratus Eigenmann 1912 -- (Burgess 1989:286 [ref. 12860], Burgess & Finley 1996:167 [ref. 22901], Ferraris in Reis et al. 2003:471 [ref. 27061], Schraml 2005:21 [ref. 28585], Ferraris 2007:69 [ref. 29155], Ribeiro & Rapp Py-Daniel 2010:103 [ref. 30759], Barriga Salazar 2014:115 [ref. 35745], DoNascimiento 2016:530 [ref. 34727]). •Synonym of Ageneiosus inermis (Linnaeus 1766) -- (Ribeiro et al. 2017:25 [ref. 35133], Koerber et al. 2017:45 [ref. 35267]). Current status: Synonym of Ageneiosus inermis (Linnaeus 1766). Auchenipteridae: Auchenipterinae. Distribution: South America: Argentina, Ecuador, Guyana, Peru, Venezuela and Suriname [if valid]. Habitat: freshwater.