Stygichthys Brittan [M. R.] & Böhlke [J. E.] 1965:1 Masc. Stygichthys typhlops Brittan & Böhlke 1965. Type by original designation (also monotypic). •Valid as Stygichthys Brittan & Bhlke 1965 -- (Géry 1977:535 [ref. 1597], Lima in Reis et al. 2003:157 [ref. 27061], Proudlove 2006:56 [ref. 28992], Mirande 2009:11 [ref. 30267] as incertae sedis in Characidae, Moreira et al. 2010:1815 [ref. 30836], Mirande 2010:546 [ref. 31006], Melo et al. 2024:17 [ref. 41541] in Stygichthyinae). Current status: Valid as Stygichthys Brittan & Böhlke 1965. Acestrorhamphidae: Stygichthyinae.