Freshly-collected specimens of Phallostethus cuulong. A) CTU-P 2494, male, 22.5 mm SL, Tra Vinh Province, Vietnam; B) CTU-P 2327, female, 23.7 mm SL, Sóc Trăng Province, Vietnam. Photographed and retouched by L.X. Tran and K. Shibukawa, respectively.