Pygidium Meyen [F. J. F.] 1834:475 Neut. Pygidium fuscum Meyen 1834. Type by monotypy. Described in footnote. •Genus inquirendum in Trichomycteridae -- (de Pinna & Wosiacki in Reis et al. 2003:287 [ref. 27061], Ferraris 2007:427 [ref. 29155]). Current status: Uncertain. Trichomycteridae: Trichomycterinae.