albicrux, Trachycorystes Berg [C.] 1901:303 [Comunicaciones del Museo Nacional de Buenos Aires v. 1 (no. 9); ref. 14743] Río de la Plata, near the mouth of Río Santiago, Buenos Aires Province, Argentina. Holotype (unique): MACN 5161. Type catalog: Braga & Piacentino 1994:98 [ref. 23697], Ferraris 2007:79 [ref. 29155]. •Valid as Parauchenipterus albicrux (Berg 1901) -- (Burgess 1989:242 [ref. 12860]). •Valid as Trachelyopterus albicrux (Berg 1901) -- (Bertoletti et al. 1995:71 [ref. 21959], Ferraris in Reis et al. 2003:478 [ref. 27061], López et al. 2003:56 [ref. 27366], Menni 2004:83 [ref. 28131], Ferraris 2007:79 [ref. 29155], Litz & Koerber 2014:18 [ref. 33622], Mirande & Koerber 2015:30 [ref. 35117], Bertaco et al. 2016:416 [ref. 34561], Nión et al. 2016:33 [ref. 35565], Calegari et al. 2019:[90] [ref. 36961], Loureiro et al. 2023:122 [ref. 40506]). Current status: Valid as Trachelyopterus albicrux (Berg 1901). Auchenipteridae: Auchenipterinae. Distribution: South America: La Plata River basin (Argentina and Uruguay). Habitat: freshwater.