Guyanancistrus Isbrücker [I. J. H.] In Isbrücker et al. 2001:19 Masc. Lasiancistrus brevispinis Heitmans, Nijssen & Isbrücker 1983. Type by original designation. •Synonym of Pseudancistrus Bleeker 1862 -- (Armbruster 2004:53, 59 [ref. 27644], Armbruster 2004:5 [ref. 27844], Ferraris 2007:287 [ref. 29155]). •Valid as Guyanancistrus Isbrücker 2001 -- (Isbrücker 2002:16 [ref. 27178], Fisch-Muller in Reis et al. 2003:384 [ref. 27061], Covain & Fisch-Muller 2012:235 [ref. 31998], Silva et al. 2014:11 [ref. 33302], Fisch-Muller et al. 2018:23 [ref. 35723]). Current status: Valid as Guyanancistrus Isbrücker 2001. Loricariidae: Hypostominae.