Bivibranchia Eigenmann [C. H.] 1912:253, 258 Fem. Bivibranchia protractila Eigenmann 1912. Type by monotypy. •Valid as Bivibranchia Eigenmann 1912 -- (Roberts 1974:432 [ref. 6872], Géry 1977:199 [ref. 1597], Vari 1983:5 [ref. 5419], Vari 1985 [ref. 5270], Vari & Goulding 1985 [ref. 5200], Langeani 1998:158 [ref. 23841], Langeani in Reis et al. 2003:97 [ref. 27061], Oliveira et al. 2011:11 [ref. 31685], Nogueira et al. 2021:7 [ref. 38941]). Current status: Valid as Bivibranchia Eigenmann 1912. Hemiodontidae.