nauticus, Zathorax Cope [E. D.] 1874:133 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 26; ref. 931] Nauta, Peru. Syntypes: ANSP 21390-95 (6). Type catalog: Böhlke 1984:99 [ref. 13621], Ferraris 2007:168 [ref. 29155]. Unjustifiably emended to nautanus as "Zathorax nauticus[-tanus]" by O'Shaughnessy in Zoological Record for 1874, p. 104. See Ferraris 2007:169 [ref. 29155] for identity of types. •Valid as Zathorax nauticus Cope 1874 -- (Burgess 1989:223 [ref. 12860]). •Valid as Anadoras nauticus (Cope 1874) -- (Ortega & Vari 1986:13 [ref. 9708]). •Valid as Amblydoras nauticus (Cope 1874) -- (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 nauticus (Cope 1874). Doradidae: Astrodoradinae. Distribution: South America: upper Amazon River basin (Ecuador, Peru and Colombia). Habitat: freshwater.