cuulong, Phallostethus Shibukawa [K.], Tran [D. D.] & Tran [L. X.] 2012:46, Figs. 1-4 [Zootaxa No. 3363; ref. 32037] A branch of the Hau River (tributary of the Mekong), Cu Lao Dung, Soc Trang Province, Vietnam, 9°30.8'N, 106°13.7'E, depth 0-0.5 meters. Holotype: ZRC 53233. Paratypes: CTU-P 2327 (1), 2494 (1), 5020 (1, c&s); NSMT-P 106664 (1), 106665 (1): USNM 404477 (1), 404478 (1), 404479 (1). •Valid as Phallostethus cuulong Shibukawa, Tran & Tran 2012 -- (Parenti 2014:178 [ref. 33268], Taki et al. 2021:319 [ref. 39830]). Current status: Valid as Phallostethus cuulong Shibukawa, Tran & Tran 2012. Phallostethidae. Distribution: Southeast Asia: lower Mekong River basin, Vietnam. Habitat: freshwater, brackish.