insidiosus, Imparfinis Steindachner [F.] 1915:61 [47], Pl. 12 (fig. 7) [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Klasse. v. 93; ref. 4244] Rio Branco at Bem Querer; Rio Surumú, Brazil. Syntypes: (several) NMW 46095 Type catalog: Ferraris 2007:182 [ref. 29155]. On p. 47 of separate; also in Steindachner 1917 [ref. 15259]. Species not listed in earlier abstract [ref. 18909]. •Not in genus Imparfinis -- (Mees & Cala 1989:382 [ref. 14277]). •Valid as Cetopsorhamdia insidiosus (Steindachner 1915) -- (Burgess 1989:277 [ref. 12860]). •Valid as Cetopsorhamdia insidiosa (Steindachner 1915) -- (Bockmann & Guazzelli in Reis et al. 2003:411 [ref. 27061], Ferraris 2007:182 [ref. 29155], Benitez et al. 2017:114 [ref. 35711], Bockmann & Reis 2021:29 [ref. 38369], Faustino-Fuster & Souza 2021:13 [ref. 38725]). Current status: Valid as Cetopsorhamdia insidiosa (Steindachner 1915). Heptapteridae: Heptapterinae. Distribution: Branco River drainage, Branco-Negro River basin, Brazil and Venezuela. Habitat: freshwater.