ranunculus, Ancistrus Muller [S.], Rapp Py-Daniel [L. H.] & Zuanon [J.] 1994:290, Fig. 1 [Ichthyological Exploration of Freshwaters v. 5 (no. 4); ref. 21571] Rio Xingu, furo do Tucum Seco, near Arroz Cru, Pará State, Brazil. Holotype: INPA 9509. Paratypes: AMNH 97639 (2); ANSP 172620-21 (1, 1); INPA 3943 (3), 3953 (45), 3961 (3), 4024 (1), 4093 (2); MHNG 2550.96-98 (1; 12, 2 c&s; 2), 2550.99 [ex ZSM 27309] (1), 2644.42 [ex. ZSM 27782] (1); MPEG 3372-73 (1, 1); MZUSP 47614 (2); USNM 331162 (2); ZMA 121162 (2); ZSM 27116 (1), 27199 (1), 27309 (2 now 1), 27782 (4 now 3). Type catalog: Ferraris 2007:224 [ref. 29155], Neumann 2011:263 [ref. 31652]. •Valid as Ancistrus ranunculus Muller, Rapp Py-Daniel & Zuanon 1994 -- (Burgess & Finley 1996:170 [ref. 22901], Montoya-Burgos et al. 1997:185 [ref. 22785], Montoya-Burgos et al. 1998:367 [ref. 23850], Isbrücker 2001:25 [ref. 25653], Isbrücker 2002:12 [ref. 27178], Fisch-Muller in Reis et al. 2003:378 [ref. 27061], Ferraris 2007:224 [ref. 29155], de Oliveira et al. 2015:81 [ref. 33869], Neuhaus et al. 2022:16 [ref. 39129]). Current status: Valid as Ancistrus ranunculus Muller, Rapp Py-Daniel & Zuanon 1994. Loricariidae: Hypostominae. Distribution: Xingu and Tocantins River basins, Brazil. Habitat: freshwater.