punctatus, Rivulus Boulenger [G. A.] 1895:3 [Bollettino dei Musei di Zoologia ed Anatomia Comparata della R. Università di Torino v. 10 (no. 196); ref. 536] Colonia Risso, Paraguay. Syntypes: (5) BMNH 1895.1.30.21 (1), BMNH 1895.1.30.22 (1); MZUT 1054 [? = 2061] (3). Type catalog: Tortonese 1940:142 [ref. 21559], Huber 1992 [ref. 20639]. Costa in Reis et al. 2003:538 [ref. 27061] treats BMNH 1895.1.30 [sic] as the holotype. •Valid as Rivulus punctatus Boulenger 1895 -- (Costa 1989:525 [ref. 14319], Huber 1992:370 [ref. 20639], Costa 1995:210 [ref. 21883], Britski et al. 1999:138 [ref. 24147], Lazara 2001:283 [ref. 25711], Costa 2003:41 [ref. 26966], Costa in Reis et al. 2003:538 [ref. 27061], López et al. 2003:70 [ref. 27366], Costa 2003:2 [ref. 27635], Casciotta et al. 2003:148 [ref. 28130], Menni 2004:86 [ref. 28131], Costa 2005:71 [ref. 28192], Costa 2006:162 [ref. 28875] in subgenus Melanorivulus, Schindler & Etzel 2008:35 [ref. 29621]). •Valid as Melanorivulus punctatus (Boulenger 1895) -- (Costa 2011:241 [ref. 31655], Koerber 2014:12 [ref. 33621], Sarmiento et al. 2014:187 [ref. 35004], Mirande & Koerber 2015:52 [ref. 35117], Nielsen et al. 2016:87 [ref. 34407], Calviño et al. 2016:11 [ref. 34699], Koerber et al. 2017:72 [ref. 35267], Costa et al. 2016:270 [ref. 35405], Deprá et al. 2017:113 [ref. 35503], Volcan et al. 2018:280 [ref. 35895], Dickens 2019:168 [ref. 37135], Drawert 2023:23 [ref. 40730]). Current status: Valid as Melanorivulus punctatus (Boulenger 1895). Rivulidae: Rivulinae. Distribution: South America: Paraguay, lower Paraná and Uruguay River basins (Argentina, Bolivia, Brazil and Paraguay). Habitat: freshwater.