Hori, S. and R. Kuroda. 2002. Re-description of Odostomia oyasiwo Nomura, 1939 with a comparison with Odostomia desimana Dall & Bartsch, 1906 (Heterobranchia: Pyramidellidae). Venus 61: 1-14.

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The pyramidellid gastropod Odostomia oyasiwo Nomura, 1939 was originally described using specimens collected in northeastern and central Japan. In 1997, more specimens were obtained from off the Kii Peninsula, and we herein re-describe O. oyasiwo on the basis of both sets of material. Shell morphology is compared in detail with a confusingly similar species, Odostomia desimana Dall & Bartsch, 1906. All the live-collected specimens examined in the present study were found on the shell of Fusinus perplexus (A. Adams, 1864), although it is not possible to determine whether this pyramidellid actually parasitizes F. perplexus without further observing the behavior of living O. oyasiwo.

Japan

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