medians, Ancistrus Kner [R.] 1854:(256) 281 [6, 31] [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Classe. v. 7; ref. 2628] Grand Inini River, Saut S, 3°36'19"N, 53°48'25"W, Suriname. Neotype: SMNS 26503 [ex MHNG 2675.094]. Type catalog: Ferraris 2007:243 [ref. 29155] with type at NMW. On pp. 6 & 31 of separate. See Isbrucker 1980 [ref. 2303] for type information. Neotype selected by Fisch-Muller 2012:189 [ref. 31970] •Valid as Hemiancistrus medians (Kner 1854) -- (Isbrücker 1980:51 [ref. 2303], Burgess 1989:434 [ref. 12860], Le Bail et al. 2000:234 [ref. 24549], Isbrücker 2001:27 [ref. 25653], Isbrücker 2002:17 [ref. 27178], Cardoso & Lucinda 2003:74 [ref. 26858], Fisch-Muller in Reis et al. 2003:386 [ref. 27061], Ferraris 2007:243 [ref. 29155], Fisch-Muller et al. 2012:189 [ref. 31970], Armbruster et al. 2015:99 [ref. 33670], Borstein et al. 2022:18 [ref. 39507]). Current status: Valid as Hemiancistrus medians (Kner 1854). Loricariidae: Hypostominae. Distribution: South America: Maroni River basin (French Guiana and Suriname). Habitat: freshwater.