A New Species of Provanna (Gastropoda: Provannidae) from an Oligocene Seep Deposit in Eastern Hokkaido, Japan

Kazutaka Amano; Robert G. Jenkins

doi:10.2517/1342-8144-17.4.325

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Kazutaka Amano,¹ Robert G. Jenkins²

¹Department of Geoscience, Joetsu University of Education, Joetsu 943–8512, Japan (e-mail: ) amano@juen.ac.jp
²Faculty of Natural System, Kanazawa University, Kanazawa 920–1192, Japan

Abstract

We describe a new species, Provanna urahoroensis sp. nov. from seep carbonates of the lower Oligocene Nuibetsu Formation in eastern Hokkaido, Japan. The new species is the second fossil record of Provanna from Paleogene rocks and resembles a smooth variant of the American Paleogene species, P. antiqua Squires, in having a smooth shell with very weak spiral cords. Based on its association with Bathymodiolus (s. l.), fossil Provanna including the new species possibly grazed preferably on bacteria on the surface of Bathymodiolus (s. l.) and of exposed carbonates.

Citation Download Citation

Kazutaka Amano and Robert G. Jenkins "A New Species of Provanna (Gastropoda: Provannidae) from an Oligocene Seep Deposit in Eastern Hokkaido, Japan," Paleontological Research 17(4), 325-329, (1 October 2013). https://doi.org/10.2517/1342-8144-17.4.325

Received: 13 December 2012; Accepted: 1 March 2013; Published: 1 October 2013

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