gemma, Nanosphronemus Britz [R.], Tan [H. H.] & Rüber [L.] 2026:607, Figs. 1-12 [Raffles Bulletin of Zoology v. 74; ref. 43294] Reportedly from wetlands of an undisclosed area in the vicinity of Huế, central Vietnam. Holotype: ZRC 70244. Paratypes: ZRC 70070 (14). Plus additional non-type material. •Valid as Nanosphronemus gemma Britz, Tan & Rüber 2026. Current status: Valid as Nanosphronemus gemma Britz, Tan & Rüber 2026. Osphronemidae: Trichogastrinae. Distribution: Southeast Asia: Huế, central Vietnam. Habitat: freshwater.