下龍灣
This species occurs in temperate northwestern Pacific Ocean off Japan, Taiwan, Vietnam Bạch Long Vĩ, Cô Tô, Hạ Long Bay; off Australia (Northern Territory, Queensland, Western Australia), and in Indonesian waters (Bali) and off New Caledonia. The shell from these last two sites differ somewhat from the holotype by being a bit more elongate and having a dark sepia color.