gracilis, Farlowella Regan [C. T.] 1904:303, Pl. 20 (fig. 3) [Transactions of the Zoological Society of London v. 17 (pt 3, no. 1); ref. 3621] Río Caquetá, Cauca Valley, southern Colombia. Holotype (unique): BMNH 1902.5.29.180. Type catalog: Ferraris 2007:237 [ref. 29155]. •Valid as Farlowella gracilis Regan 1904 -- (Isbrücker 1980:98 [ref. 2303], Burgess 1989:441 [ref. 12860], Retzer & Page 1997:75 [ref. 23176], Isbrücker 2001:27 [ref. 25653], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:332 [ref. 27061], Retzer 2006:61 [ref. 28957], Ferraris 2007:237 [ref. 29155], Ballen & Mojica 2014:140 [ref. 33176], Barriga Salazar 2014:112 [ref. 35745], Ballen et al. 2016:331 [ref. 34915], DoNascimiento et al. 2017:77 [ref. 35633]). Current status: Valid as Farlowella gracilis Regan 1904. Loricariidae: Loricariinae. Distribution: Amazon River basin: Ecuador and Colombia. Habitat: freshwater.