gracilis, Harttia Oyakawa [O. T.] 1993:16, Fig. 5 [Comunicações do Museu de Ciências da PUCRS, Série Zoologia v. 6; ref. 21109] Upper Rio Paraná basin, Brazil, 20°58'S, 46°47'W. Holotype: MZUSP 43267. Paratypes: MCP 15106 (3); MNRJ 12143 (3); MZUSP 35399 (6), 42695 (2, c&s). Type catalog: Ferraris 2007:241 [ref. 29155]. •Valid as Harttia gracilis Oyakawa 1993 -- (Burgess & Finley 1996:170 [ref. 22901], Langeani et al. 2001:141 [ref. 25126], Rapp Py-Daniel & Oliveira 2001:80 [ref. 25404], Isbrücker 2001:27 [ref. 25653], Isbrücker 2002:16 [ref. 27178], Ferraris in Reis et al. 2003:335 [ref. 27061], Provenzano et al. 2005:521 [ref. 28461], Ferraris 2007:241 [ref. 29155], Oyakawa et al. 2013:785 [ref. 33027], Oyakawa et al. 2018:85 [ref. 35818]). Current status: Valid as Harttia gracilis Oyakawa 1993. Loricariidae: Loricariinae. Distribution: Upper Paraná River basin, Brazil. Habitat: freshwater.