posthon, Phenacostethus Roberts [T. R.] 1971:12, Figs. 3, 5, 6 [not 7] [Breviora No. 374; ref. 603] Khlong Kla Sohm, about 15 kilometers southwest of Pungah town, Pungah, Thailand. Holotype: MCZ 47300. Paratypes: KUMF (7); MCZ 47301 (58 or 56, 2 c&s), 47302 (20). •Valid as Phenacostethus posthon Roberts 1971 -- (Parenti 1989:268 [ref. 13486], Kottelat et al. 1993:96 [ref. 23448], Parenti 1996:704 [ref. 22231], Shibukawa et al. 2012:44 [ref. 32037], Kulabtong et al. 2012:159 [ref. 32364], Kottelat 2013:285 [ref. 32989], Parenti 2014:178 [ref. 33268], Taki et al. 2021:320 [ref. 39830], Parenti et al. 2023:561 [ref. 40527]). Current status: Valid as Phenacostethus posthon Roberts 1971. Phallostethidae. Distribution: Southeast Asia: Malay Peninsula to lower Mekong River basin, Vietnam. Habitat: freshwater, brackish.