Megalancistrus Isbrücker [I. J. H.] 1980:52 Masc. Chaetostomus gigas Boulenger 1895. Type by original designation. •Valid as Megalancistrus Isbrücker 1980 -- (Heitmans et al. 1983 [ref. 5278], Burgess 1989:434 [ref. 12860], Britski et al. 1999:134 [ref. 24147], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:23 [ref. 27178], Fisch-Muller in Reis et al. 2003:390 [ref. 27061], Armbruster 2004:53, 59 [ref. 27644], Ferraris 2007:272 [ref. 29155], Bertaco et al. 2016:419 [ref. 34561]). Current status: Valid as Megalancistrus Isbrücker 1980. Loricariidae: Hypostominae.