smaragdina, Betta Ladiges [W.] 1972:190, Figs. [Die Aquarien- und Terrarienzeitschrift (DATZ) v. 25 (no. 6); ref. 19853] Nongkhai, Thailand. Holotype: ZMH H4639. Paratypes: ZMH H4640 (1). Type catalog: Wilkens 1977:160 [ref. 22013]. •Valid as Betta smaragdina Ladiges 1972 -- (Vierke 1986:95 [ref. 36452], Vierke 1988:136 [ref. 36453], Schaller & Kottelat 1989:31 [ref. 13604], Witte & Schmidt 1992:327 [ref. 14256], Kottelat 2001:160 [ref. 25780], Tan & Ng 2005:86 [ref. 28354], Kuwasupat et al. 2012:49 [ref. 32254], Kowasupat et al. 2012:387 [ref. 32320], Kottelat 2013:452 [ref. 32989], Kottelat 2015:48 [ref. 33971], Taki et al. 2021:410 [ref. 39830], Poungcharean & Limpivadhana 2022:106 [ref. 39979]). Current status: Valid as Betta smaragdina Ladiges 1972. Osphronemidae: Macropodusinae. Distribution: Southeast Asia: Mekong River basin (Thailand and Laos). Habitat: freshwater.