angustirostris, Pygidium Devincenzi [G. J.] in Devincenzi & Teague 1942:30, Pl. 4 (fig. 3) [Anales del Museo Nacional de Historia Natural de Montevideo (Serie 2) v. 5 (no. 4); ref. 12268] La Cañeda de las Piedras, lower Río Uruguay, Uruguay. Holotype: MHNM CI (lost). Paratypes: BMNH 1944.6.20.1 (1), MNRJ 3605 (2), MHNM (3, lost). Type catalog: Olazarri et al. 1970:4 [ref. 23527], Ferraris 2007:413 [ref. 29155], Loureiro et al. 2016:412 [ref. 35150]. •Valid as Trichomycterus angustirostris (Devincenzi 1942) -- (Burgess 1989:321 [ref. 12860], Nión et al. 2016:30 [ref. 35565]). •Valid as Scleronema angustirostris (Devincenzi 1942) -- (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]). •Valid as Scleronema angustirostre (Devincenzi 1942) -- (Ferraris 2007:413 [ref. 29155], Litz & Koerber 2014:22 [ref. 33622]). •Synonym of Scleronema minutum (Boulenger 1891) -- (Ferrer & Malabarba 2020:40 [ref. 37587]). Current status: Synonym of Scleronema minutum (Boulenger 1891). Trichomycteridae: Trichomycterinae. Habitat: freshwater.