johnsoni, Pygidium Fowler [H. W.] 1932:367, Fig. p. 364 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 84; ref. 16366] Descalvados, Mato Grosso State, Brazil. Holotype (unique): ANSP 53873. Type catalog: Böhlke 1984:163 [ref. 13621], Ferraris 2007:419 [ref. 29155] •Valid as Trichomycterus johnsoni (Fowler 1932) -- (Burgess 1989:322 [ref. 12860], Britski et al. 1999:92 [ref. 24147], Fernández 2000:32 [ref. 26195], Miquelarena & Fernández 2000:44 [ref. 27633], Fernández & Bichuette 2002:278 [ref. 26539], de Pinna & Wosiacki in Reis et al. 2003:282 [ref. 27061], López et al. 2003:40 [ref. 27366], Menni 2004:82 [ref. 28131], Ferraris 2007:419 [ref. 29155], Barbosa & Costa 2010:121 [ref. 30782], Dutra et al. 2012:226 [ref. 32029], Mirande & Koerber 2015:38 [ref. 35117], Henschel 2016:118 [ref. 34775]). •Valid as Potamoglanis johnsoni (Fowler 1932) -- (Henschel et al. 2018:49 [ref. 35657], Mirande & Koerber 2020:2 [ref. 37594]). Current status: Valid as Potamoglanis johnsoni (Fowler 1932). Trichomycteridae: Glanapteryginae. Distribution: South America: Pantanal wetlands, Paraguay River basin (Argentina and Brazil). Habitat: freshwater.