nahangensis, Vanmanenia Nguyen [V. H.] 2005:572, Fig. 17 [Freshwater fishes of Vietnam v. 2; ref. 29730] Gâm River, Nà Hang, Tuyên Quang Province, Vietnam. Holotype: NCNTTSI (lost). Species spelled nahangenis in caption to figure 17; regarded [W.N.E.] as a lapsus [misspelling]; spelled nahangensis in the main heading and that spelling is appropriate for the appropriate suffix. Types at RIA 1 [= NCNTTSI] are lost according to Endruweit 2014:144 [ref. 33205]. •Species inquirenda et incertae sedis -- (Kottelat 2012:71 [ref. 32367]). •Status uncertain as Vanmanenia nahangensis Nguyen 2005 -- (Kottelat 2013:197 [ref. 32989], Yi et al. 2014:96 [ref. 33322], Kottelat 2017:93 [ref. 35488]). Current status: Uncertain as Vanmanenia nahangensis Nguyen 2005. Gastromyzontidae. Distribution: Southeast Asia: Red River basin, Tuyên Quang Province, Vietnam. Habitat: freshwater.