Oligancistrus Rapp Py-Daniel [L. H.] 1989:246 Masc. Chaetostomus punctatissimus Steindachner 1881. Type by original designation (also monotypic, one species mentioned). Genus proposed somewhat conditionally but accepted as available (see also Baryancistrus Rapp Py-Daniel and Appendix A in Eschmeyer 1990 [ref. 20647]). •Valid as Oligancistrus Rapp Py-Daniel 1989 -- (Burgess & Finley 1996:168 [ref. 22901], Armbruster 2002:87 [ref. 25891], Isbrücker 2002:23 [ref. 27178], Fisch-Muller in Reis et al. 2003:390 [ref. 27061], Ferraris 2007:274 [ref. 29155]). •Synonym of Spectracanthicus Nijssen & Isbrücker 1987 -- (Armbruster 2004:53, 59 [ref. 27644], Chamon & Rapp Py-Daniel 2014:2 [ref. 33224]). Current status: Synonym of Spectracanthicus Nijssen & Isbrücker 1987. Loricariidae: Hypostominae.