bicolor, Monopterus Nguyen [H. D.] & Nguyen [V. H.] in Nguyen 2006:629, Fig. 1 [Freshwater fishes of Vietnam v. 3; ref. 29809] Dien Khanh (Khanh Hoa), south-central Vietnam, about 12°17'N, 109°03'E. Holotype: HNUE (lost). Paratype: HNUE (1, lost). •Valid as Monopterus bicolor Nguyen & Nguyen 2006 as species inquienda -- (Kottelat 2013:308 [ref. 32989], Endruweit 2024:116 [ref. 41040]). Current status: Uncertain as Monopterus bicolor Nguyen & Nguyen 2006. Synbranchidae. Distribution: Southeast Asia: Cai River drainage, Dien Khanh district, Khanh Hoa Province, Vietnam [if valid]. Habitat: freshwater.