minutus, Trichomycterus Boulenger [G. A.] 1891:235, Pl. 26 (fig. 3) [Proceedings of the Zoological Society of London 1891 (pt 2); ref. 17039] San Lorenzo District, Rio Grande do Sul, Brazil [= São Lourenço do Sul, 31°21'55"S, 51°58'42"W]. Lectotype: BMNH 1891.3.16.84. Paralectotypes: BMNH 1891.3.16.85-86 (2). Type catalog: Ferraris 2007:413 [ref. 29155]. Lectotype selected by Ferrer & Malabarba 2020:41 [ref. 37587]. •Valid as Trichomycterus minutus Boulenger 1891 -- (Burgess 1989:322 [ref. 12860] as minutum, Nión et al. 2016:30 [ref. 35565] with author in parentheses). •Valid as Scleronema minutum (Boulenger 1891) -- (Malabarba 1989:145 [ref. 14217], Casciotta & Almirón 1996:52 [ref. 25534], de Pinna & Wosiacki in Reis et al. 2003:278 [ref. 27061], López et al. 2003:38 [ref. 27366], Menni 2004:82 [ref. 28131], Ferraris 2007:413 [ref. 29155], Litz & Koerber 2014:22 [ref. 33622], Fernández et al. 2015:14 [ref. 35041], Mirande & Koerber 2015:37 [ref. 35117], Bertaco et al. 2016:421 [ref. 34561], Ochoa et al. 2017:557 [ref. 35582], Ferrer & Malabarba 2020:40 [ref. 37587], Ferrer 2021:247 [ref. 38890], Koerber et al. 2021:5 [ref. 38894], Costa et al. 2022:93 [ref. 39059], Koerber et al. 2023:6 [ref. 40355], Loureiro et al. 2023:88 [ref. 40506]). Current status: Valid as Scleronema minutum (Boulenger 1891). Trichomycteridae: Trichomycterinae. Distribution: South America: Laguna dos Patos, lower Uruguay and lower Paraná River basins (Brazil, Uruguay and Argentina). Habitat: freshwater.