hahni, Sternarchorhamphus Meinken [H.] 1937:79, Fig. 3 [Blätter für Aquarien- und Terrarienkunde v. 48 (no. 4); ref. 15288] Río Paranà basin, near Corrientes, Argentina. Holotype (unique): ZMB 31367. Type catalog: Ferraris et al. 2017:[28] [ref. 35236]. •Valid as Sternarchorhamphus hahni Meinken 1937 -- (Mago-Leccia 1994:36 [ref. 21320]). •Valid as Rhamphichthys hahni (Meinken 1937) -- (Campos-da-Paz & Paepke 1994:155 [ref. 21383], Campos-da-Paz 1995:34 [ref. 22512], Britski et al. 1999:86 [ref. 24147], Albert 2001:124 [ref. 25614], Ferraris in Reis et al. 2003:493 [ref. 27061], López et al. 2003:65 [ref. 27366], Casciotta et al. 2003:142 [ref. 28130], Menni 2004:84 [ref. 28131], Carvalho et al. 2011:405 [ref. 31553], Litz & Koerber 2014:28 [ref. 33622], Carvalho & Albert 2015:40 [ref. 33681], Mirande & Koerber 2015:47 [ref. 35117], Bertaco et al. 2016:422 [ref. 34561], Vera-Alcaraz et al. 2017:6 [ref. 35082], Ferraris et al. 2017:[28] [ref. 35236], Koerber et al. 2017:69 [ref. 35267], Reis et al. 2020:463 [ref. 38364], Loureiro et al. 2023:82 [ref. 40506] as hani, Carvalho & Albert 2023:28 [ref. 40654]). Current status: Valid as Rhamphichthys hahni (Meinken 1937). Rhamphichthyidae. Distribution: South America: Paraná-Paraguay River basin, Argentina, Brazil, Paraguay and Uruguay. Habitat: freshwater.