sympelvicus, Pseudecheneis Roberts [T. R.] 1998:290, Fig. 1 [Raffles Bulletin of Zoology v. 46 (no. 2); ref. 23905] Nam Veo, tributary of Nam Phao, 25 kilometers east of Lak Sao, Nam Theun watershed, Mekong River Basin, Laos. Holotype: ZRC 40359. Paratypes: ZRC 40360 (1). Type catalog: Ferraris 2007:401 [ref. 29155], Ng & Kim 2008:67 [ref. 29920]. The author regards sympelvicus as an adjective; Pseudecheneis is feminine so the species is changed to sympelvica. •Valid as Pseudecheneis sympelvicus Roberts 1998 -- (Kottelat 2001:138 [ref. 25780], Zhou & Zhou 2005:418 [ref. 28435], Taki et al. 2021:302 [ref. 39830]). •Valid as Pseudecheneis sympelvica Roberts 1998 -- (Ng & Edds 2005:1 [ref. 28344], Ng 2006:46 [ref. 28737], Ng 2006:67 [ref. 28759], Thomson & Page 2006:61 [ref. 28859], Ng & Tan 2007:25 [ref. 28971], Vishwanath & Darshan 2007:2630 [ref. 28988], Ferraris 2007:401 [ref. 29155], Anganthoibi & Vishwanath 2010:199 [ref. 31042], Kottelat 2013:231 [ref. 32989], Kottelat 2015:47 [ref. 33971]). Current status: Valid as Pseudecheneis sympelvica Roberts 1998. Sisoridae: Glyptosterninae. Distribution: Southeast Asia: Mekong River basin, Laos. Habitat: freshwater.