A left valve of Promanawa konishii (Nohara, 1976) was found in the modern surface sediment of the East China Sea, off the western Iheya-Izena Islands, SW Japan (Fig. 1). The specimen was collected from St 447 (26.98°N, 127.72°E, 512 m water depth) during the GH09 cruise by the Geological Survey of Japan, Agency of Industrial Science and Technology (AIST). Promanawa konishii has a laterally compressed semi-elliptical carapace with a wide frill around the entire ventral margin and a long straight hinge, uniquely characteristic of the superfamily Puncioidea which includes the extant genera Manawa, Promanawa and Puncia...

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