bimaculata, Bivibranchia Vari [R. P.] 1985:517, Fig. 3 [Proceedings of the Biological Society of Washington v. 98 (no. 2); ref. 5270] Rocky pool in the center of Corantijn River at "Camp Hydro", Nickerie District, Suriname, about 3°42'N, 57°58'W. Holotype: USNM 225974. Paratypes: AMNH 54807 (7), 55611 (1); ANSP 153656 (1); BMNH 1981.6.8.816 (1), 1984.10.23.1 (1); USNM 268203 (9, 1 c&s). Type catalog: Vari & Howe 1991:8 [ref. 19022]. •Valid as Bivibranchia bimaculata Vari 1985 -- (Géry et al. 1991:22 [ref. 21021], Planquette et al. 1996:94 [ref. 22818], Langeani in Reis et al. 2003:97 [ref. 27061], Nogueira et al. 2021:7 [ref. 38941], Borstein et al. 2022:16 [ref. 39507], Taphorn et al. 2022:24 [ref. 41297]). Current status: Valid as Bivibranchia bimaculata Vari 1985. Hemiodontidae. Distribution: South America: Corantijn, Suriname, and Maroni River basins (French Guiana, Guyana and Suriname). Habitat: freshwater.