longispinis, Lasiancistrus Heitmans [W. R. B.], Nijssen [H.] & Isbrücker [I. J. H.] 1983:45, Figs. 8-9 [Bijdragen tot de Dierkunde v. 53 (no. 1); ref. 5278] Camopi River at Pauwé Jean-Jean, upstream of Saut Mauvais, 3°11'N, 52°22'W, Oyapock River system, French Guiana. Holotype: IRSNB 612. Paratypes: IRSNB 613 (orig. 6, now 2), 614-615 (2, 1), 616 (orig. 12, now 7); MNHN 1979-0158 to 0163 (1 ea. = 6), 1982-0851 to 0852 (1, 1); MZUSP [ex IRSNB 613] (4), [ex IRSNB 616] (5); ZMA 115306 (2), 115307-09 (3, 1, 2), 107748 (1). Type catalog: Walschaerts 1987:20 [ref. 20755], Ferraris 2007:287 [ref. 29155]. •Valid as Lasiancistrus longispinis Heitmans, Nijssen & Isbrücker 1983 -- (Burgess 1989:434 [ref. 12860], Le Bail et al. 2000:238 [ref. 24549], Knaack 2000:58 [ref. 27233]). •Valid as Pseudancistrus longispinis (Heitmans, Nijssen & Isbrücker 1983) -- (Armbruster 2004:5 [ref. 27844], Ferraris 2007:287 [ref. 29155], Willink et al. 2010:41 [ref. 30670]). •Valid as Guyanancistrus longispinis (Heitmans, Nijssen & Isbrücker 1983) -- (Isbrücker et al. 2001:19 [ref. 25649], Isbrücker 2001:27, 29 [ref. 25653], Fisch-Muller in Reis et al. 2003:385 [ref. 27061], Isbrücker 2002:16 [ref. 27178], Silva et al. 2014:11 [ref. 33302], Fisch-Muller et al. 2018:49 [ref. 35723]). Current status: Valid as Guyanancistrus longispinis (Heitmans, Nijssen & Isbrücker 1983). Loricariidae: Hypostominae. Distribution: Oyapock River basin, French Guiana. Habitat: freshwater.