labiatus, Arius Boulenger [G. A.] 1898:6 [Bollettino dei Musei di Zoologia ed Anatomia Comparata della R. Università di Torino v. 13 (no. 329); ref. 14677] Río Peripa, Ecuador. Holotype (unique): MZUT 1540. Type catalog: Tortonese 1940:136 [ref. 21559]. •Valid as Hexanematichthys labiatus (Boulenger 1898) -- (Ovchynnyk 1967:34 [ref. 37559]). •Status uncertain -- (Kailola & Bussing in Fischer et al. 1995:866 [ref. 22829]). •Species inquirenda in Arridae -- (Marceniuk & Ferraris in Reis et al. 2003:453 [ref. 27061]). •Apparently a species of Potamarius Hubbs & Miller -- (Betancur-R. & Acero P. 2004:13 [ref. 28008]). •Species inquirenda in Potamarius -- (Marceniuk & Menezes 2007:98 [ref. 29031]). •Valid as Chinchaysuyoa labiata (Boulenger 1898) -- (Marceniuk et al. 2019:365 [ref. 36489], Marceniuk et al. 2023:16 [ref. 40422]). Current status: Valid as Chinchaysuyoa labiata (Boulenger 1898). Ariidae: Ariinae. Distribution: South America: Guayas River basin (western Ecuador). Habitat: freshwater.