duchuunguyeni, Opsariichthys Huynh [T. Q.] & Chen [I-S.] 2014:136, Figs. 1-2 [Journal of Marine Science and Technology v. 21, Suppl. [for 2013]; ref. 33158] Ky Cung River, Ky Chun -- Bang Giang river basin, Chi Lang commune, Trang Dinh district, Lang Son Province, Vietnam, 22°17'20.7"N, 106°27'30.0"E. Holotype: NTOUP-2013-10-186. Paratypes: NTOU P-2013-10-185 (3), -187 (1). •Valid as Opsariichthys duchuunguyeni Huynh & Chen 2014 -- (Wang et al. 2019:[6] [ref. 36521], Chen et al. 2024:11 [ref. 41608], Peng et al. 2024:28 [ref. 41610]). Current status: Valid as Opsariichthys duchuunguyeni Huynh & Chen 2014. Xenocyprididae. Distribution: Southeast Asia: Ky Cung River drainage, northern Vietnam and upper Pearl River basin, Guangxi Province, China. Habitat: freshwater.