Miocene Mollusca from the Ichibu Formation on Nishinoshima Island, Oki Islands, Southwest Japan Matsubara, Takashi and Noro, Ikkei and Matsuura, Yasutaka and Irizuki, Toshiaki, Paleontological Research, 18, 6-32 (2014), DOI:http://dx.doi.org/10.2517/2014PR002