may be a synonym of Hydrodendron pacificum (Stechow, 1913) [details]
Japan, Hirado Strait, 33°5’-33°15’N 129°15’-129°16’E; depth 80 m [details]
Japan, Okinawa Islands, SE of Kume Island, 26.2451°N 126.8573°E, 179-192 m [details]
Japan, Okinawa Islands, SE of Kume Island, 26.2836°N 126.9007°E, 142-149 m [details]
Japan, Hirado Strait, 33°5’-33°15’N 129°15’-129°16’E; depth 80 m [details]
Japan, Okinawa Islands, SE of Kume Island, 26.2776°N 126.89145°E, 151-160 m [details]