balzanii, Haplochilus Perugia [A.] 1891:653 [53] [Annali del Museo Civico di Storia Naturale di Genova (Serie 2) v. 10; ref. 3431] Cáceres (formerly Villa María), Río Paraguay, Mato Grosso, Brazil. Syntypes: MSNG 9243 (orig. 6, now 5), NMW 81378 (2). Type catalog: Tortonese 1963:313 [ref. 10351]. On p. 53 of separate. •Valid as Trigonectes balzanii (Perugia 1891) -- (Costa 1990:140 [ref. 14542], Huber 1995:18 [ref. 22880], Costa 1998:78 [ref. 23792], Britski et al. 1999:140 [ref. 24147], Lazara 2001:309 [ref. 25711], Costa in Reis et al. 2003:543 [ref. 27061], López et al. 2003:71 [ref. 27366], Menni 2004:86 [ref. 28131], Sarmiento et al. 2014:187 [ref. 35004], Mirande & Koerber 2015:52 [ref. 35117], Calviño et al. 2016:11 [ref. 34699], Koerber 2016:142 [ref. 35012], Koerber et al. 2017:72 [ref. 35267], Drawert 2023:41 [ref. 40730]). Current status: Valid as Trigonectes balzanii (Perugia 1891). Rivulidae: Rivulinae. Distribution: South America: Paraguay River basin (Argentina, Brazil, Bolivia and Paraguay). Habitat: freshwater.