orientalis, Guyanancistrus brevispinis Fisch-Muller [S.], Mol [J. H. A.] & Covain [R.] 2018:36, Figs. 8i-j, 11 [PLoS ONE v. 13 (no. 1) e0189789; ref. 35723] Forest creek, left tributary of Upper Oyapock River, in front of Roche Mon Père, French Guiana, 03˚16'56.3"N, 52˚12'36.6"W. Holotype: MNHN 2017-0450 [ex MHNG 2681.098]. Paratypes: MHNG, MNHN. Plus additional non-type material. •Synonym of Guyanancistrus brevispinis (Heitmans, Nijssen & Isbrücker 1983). Current status: Synonym of Guyanancistrus brevispinis (Heitmans, Nijssen & Isbrücker 1983). Loricariidae: Hypostominae. Distribution: Mahury to the Approuage and Oyapock River basins, French Guiana (this subspecies). Habitat: freshwater.