mattogrossenssis, Ancistrus Miranda Ribeiro [A. de] 1912:5 [Loricariidae, Callichthyidae, Doradidae e Trichomycteridae Annexo no. 5; ref. 3718] Mato Grosso?, Brazil. Syntypes: (2) whereabouts unknown. Type catalog: Ferraris 2007:300 [ref. 29155]. Perhaps intended to be mattogrossensis as used by current authors. •Valid as Ancistrus mattogrossensis Miranda Ribeiro 1912 -- (Isbrücker 1980:70 [ref. 2303], Burgess 1989:437 [ref. 12860], Knaack 1999:152 [ref. 23874], Isbrücker 2001:25 [ref. 25653], Isbrücker 2002:12 [ref. 27178], Fisch-Muller in Reis et al. 2003:377 [ref. 27061]). •Species inquirenda in Loricariidae -- (Ferraris 2007:300 [ref. 29155], Bifi et al. 2009:41 [ref. 30541] as not in Ancistrus). Current status: Uncertain as Ancistrus mattogrossensis Miranda Ribeiro 1912. Loricariidae: Hypostominae. Distribution: Mato Grosso?, Brazil. Habitat: freshwater.