monitor, Zathorax Cope [E. D.] 1872:272, Pl. 4 (figs. 1a-1c) [Proceedings of the Academy of Natural Sciences of Philadelphia v. 23; ref. 921] Río Ambyiacu, Peru. Lectotype: ANSP 8296. Paralectotypes: ANSP 8297 (1). Type catalog: Böhlke 1984:99 [ref. 13621], Ferraris 2007:169 [ref. 29155]. Lectotype established by Eigenmann 1925:363, Pl. 16 (fig. 3) [ref. 1244]. •Valid as Amblydoras monitor (Cope 1872) -- (Ortega & Vari 1986:13 [ref. 9708], Burgess 1989:223 [ref. 12860], Sabaj & Ferraris in Reis et al. 2003:459 [ref. 27061], Ferraris 2007:169 [ref. 29155], Barriga Salazar 2014:115 [ref. 35745], DoNascimiento et al. 2017:88 [ref. 35633], Meza-Vargas et al. 2021:22 [ref. 39298]). Current status: Valid as Amblydoras monitor (Cope 1872). Doradidae: Astrodoradinae. Distribution: South America: upper Amazon River basin (Brazil, Ecuador, Colombia and Peru). Habitat: freshwater.