Molluscs from Hydrothermal Vents and Cold Seeps in Japan: A ...

112T. Sasaki, T. Okutani & K. FujikuraType locality: Minami Ensei Knoll, Okinawa Trough, 28˚23.5´ N, 127˚38.4´ E, 690 m (Shinkai2000 Dive 610).Other distribution records: North Knoll of Iheya Ridge, Okinawa Trough, 1050 m (Shinkai2000 Dive 864) (Okutani & Fujiwara, 2000); 1049 m (Shinkai 2000 Dive 863) (Sasaki et al.,2003: 199). Izena Hole, Okinawa Trough, 1340 m (Shinkai 2000 Dive 360) (Sasaki et al., 2003:199).Depth range and type of habitat: 690-1340 m; vent.43. Puncturella rimaizenaensis Okutani, Fujikura & Sasaki, 1993[Japanese name: Izena-koudaka-sukashigai]Puncturella rimaizenaensis Okutani, Fujikura & Sasaki, 1993: 126, figs. 2-7.Punctrella [sic] rimaizenaensis: Sasaki, 2000: 50 (pl. 25), fig. 33, 51.Type depository: Holotype, NSMT-Mo 69966 (Fig. 13B).Type locality: Izena Hole, Okinawa Trough, 27˚16.1´ N, 127˚04.9´ E, 1340 m (Shinkai 2000Dive 360). Known only from the type locality.Type of habitat: Vent.Family Pyropeltidae McLean & Haszprunar, 1987Genus Pyropelta McLean & Haszprunar, 198744. Pyropelta yamato Sasaki, Okutani & Fujikura, 2003[New Japanese name: Kasane-watazoko-shirogasa]Fig. 13. Fissurellidae. A. Puncturella parvinobilis Okutani, Fujikura & Sasaki, 1993, holotype, NSMT-Mo 69968. B. Puncturella rimaizenaensis Okutani, Fujikura & Sasaki, 1993, holotype, NSMT-Mo 69966.