molossus, Cynopotamus Kner [R.] 1858:168 [8] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 32 (no. 22); ref. 18871] Rio Guaporé, Caicara, Mato Grosso, Brazil. Syntypes: NMW 68754-55 (2, 2), 92856 (2). Appeared in more detail in Kner 1860:51 [p. 43 in separate], Pl. 7 (fig. 16) [ref. 7130]. •Valid as Roestes molossus (Kner 1858) -- (Prada-Pedreros 1997:353 [ref. 24956], Menezes & Lucena 1998:286 [ref. 23657], Lucena & Menezes 1998:263 [ref. 23776], Britski et al. 1999:55 [ref. 24147], Toledo-Piza in Reis et al. 2003:236 [ref. 27061], Torrente-Vilara et al. 2008:103 [ref. 29867], Barriga Salazar 2014:109 [ref. 35745], Sarmiento et al. 2014:69, 186 [ref. 35004], DoNascimiento et al. 2017:46 [ref. 35633], Silvano et al. 2020:120 [ref. 38133]). Current status: Valid as Roestes molossus (Kner 1858). Acestrorhynchidae: Roestinae. Distribution: South America: Amazon River basin (Brazil, Ecuador, Colombia and Bolivia). Habitat: freshwater.