surinamensis, Bivibranchia simulata Géry [J.], Planquette [P.] & Le Bail [P.-Y.] 1991:27 [Cybium v. 15 (no. 1, suppl.); ref. 21021] Right tributary of Nickerie River, about 1/2 hr below Blanche-Marie Falls, Suriname. Holotype: RMNH. Paratypes: RMNH (12, 2, 2, 54); ZMA 106864-65 (1, 1), ZMA.PISC 106901 (4). Plus additional material. •Presumed synonym of Bivibranchia simulata Géry, Planquette & Le Bail 1991, but a valid subspecies as described. •Synonym of Bivibranchia simulata Géry, Planquette & Le Bail 1991 -- (Langeani in Reis et al. 2003:97 [ref. 27061], Langeani 2024:366 [ref. 40817]). Current status: Synonym of Bivibranchia simulata Géry, Planquette & Le Bail 1991. Hemiodontidae. Habitat: freshwater.