rondoni, Urumara Miranda Ribeiro [A. de] 1920:6 [Peixes (excl. Characinidae) No. 58 (Annexo 5); ref. 3727] Rio 17 de Fevereiro, tributary of Alto Cautário, Amazonas, Brazil. Holotype (unique): MNRJ 3631. Type catalog: Miranda Ribeiro 1955:398 [ref. 12732], Ferraris et al. 2017:[26] [ref. 35236]. •Valid as Gymnorhamphichthys rondoni (Miranda Ribeiro 1920) -- (Schwassmann 1989:157 [ref. 13745], Mago-Leccia 1994:42 [ref. 21320], Chang & Ortega 1995:3 [ref. 24302], Albert 2001:124 [ref. 25614], Ferraris in Reis et al. 2003:492 [ref. 27061], Lundberg 2005:3 [ref. 29334], Carvalho et al. 2011:400 [ref. 31553], de Santana & Crampton 2011:1155 [ref. 31643], Barriga Salazar 2014:116 [ref. 35745], Sarmiento et al. 2014:107, 188 [ref. 35004], Melo et al. 2016:134 [ref. 34701], DoNascimiento et al. 2017:66 [ref. 35633], Ferraris et al. 2017:[26] [ref. 35236], Garcia & Zuanon 2019:215 [ref. 36947], Ochoa et al. 2020:64 [ref. 37781], Meza-Vargas et al. 2021:21 [ref. 39298], Koerber et al. 2022:44 [ref. 39235], Torgersen et al. 2023:780 [ref. 40692]). Current status: Valid as Gymnorhamphichthys rondoni (Miranda Ribeiro 1920). Rhamphichthyidae. Distribution: South America: Amazon, Paraná, Orinoco River basins and coastal rivers of the Guianas (Brazil, Ecuador, Bolivia, Colombia, Guyana, Paraguay, Peru, Suriname and Venezuela). Habitat: freshwater.