hahni, Farlowella Meinken [H.] 1937:77, Fig. 2 [Blätter für Aquarien- und Terrarienkunde v. 48 (no. 4); ref. 15288] Western branch of mouth of Río Paraguay, 14 km north-northeast of Corrientes (Prov. Chaco, Argentina) (ca. 27°22'03''S 58°46'29''W) Syntypes: ZMB 35296 (2). Type catalog: Sabaj et al. 1997:271 [ref. 23225], Ferraris 2007:238 [ref. 29155], Koerber & Azpelicueta 2021:100 [ref. 38171]. Neotype (UMMZ 228132, Río Paraná, about 2 kilometers east of Ayolas, 27°24'S, 56°46'W, Misiones Dept., Paraguay) designated by Retzer & Page 1997:76 [ref. 23176]; neotype designation invalid as original syntypes were rediscovered (Koerber & Azpelicueta 2021:101 [ref. 38171]). Comments on type locality see Koerber & Azpelicueta 2021:102 [ref. 38171]. Invalid category "paraneotypes" used by Retzer & Page 1997:76 [ref. 23176]. •Valid as Farlowella hahni Meinken 1937 -- (Isbrücker 1980:98 [ref. 2303], Burgess 1989:441 [ref. 12860], Retzer & Page 1997:76 [ref. 23176], Isbrücker 2001:27 [ref. 25653], Isbrücker 2002:15 [ref. 27178], Ferraris in Reis et al. 2003:333 [ref. 27061], López et al. 2003:45 [ref. 27366], Menni 2004:79 [ref. 28131], Ferraris 2007:238 [ref. 29155], Azpelicueta & Koerber 2014:97 [ref. 33832], Mirande & Koerber 2015:44 [ref. 35117], Koerber et al. 2017:64 [ref. 35267], Terán et al. 2019:6 [ref. 36818], Reis et al. 2020:468 [ref. 38364], Koerber & Azpelicueta 2021:101 [ref. 38171]). Current status: Valid as Farlowella hahni Meinken 1937. Loricariidae: Loricariinae. Distribution: South America: middle Paraná River basin (Argentina and Paraguay). Habitat: freshwater.