New cheilostome bryozoans from the Middle Miocene of Hokkaido, Japan, and the first fossil occurrences of Kubaninella and Hayamiellina gen. nov

Andrei V. Grischenko; Dennis P. Gordon; Ayumu Nojo; Makoto Kawamura; Naotomo Kaneko; Shunsuke F. Mawatari

doi:10.2517/prpsj.8.167

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1 October 2004 New cheilostome bryozoans from the Middle Miocene of Hokkaido, Japan, and the first fossil occurrences of Kubaninella and Hayamiellina gen. nov

Andrei V. Grischenko, Dennis P. Gordon, Ayumu Nojo, Makoto Kawamura, Naotomo Kaneko, Shunsuke F. Mawatari

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Paleontological Research, 8(3):167-179 (2004). https://doi.org/10.2517/prpsj.8.167

Abstract

Three new species and one new genus of cheilostome Bryozoa are described from the Kaigarabashi Sandstone Beds (Kunnui Formation, late Middle Miocene) of southwestern Hokkaido. These are Hayamiellina constans (Cribrilinidae), Integripelta sakagamii (Eurystomellidae), and Kubaninella miocenica (Adeonidae). Monotypic Hayamiellina gen. nov. is also reported living at shelf depths off the Commander Islands, Bering Sea, and in the Gulf of Alaska. The finding of K. miocenica constitutes the first fossil record of the formerly monotypic genus Kubaninella. These new records, from a locality previously sampled for Bryozoa, underscore the inadequate level of sampling and taxonomic work on the evidently biodiverse and highly endemic bryozoan fauna of the Japanese Cenozoic.

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Andrei V. Grischenko, Dennis P. Gordon, Ayumu Nojo, Makoto Kawamura, Naotomo Kaneko, and Shunsuke F. Mawatari "New cheilostome bryozoans from the Middle Miocene of Hokkaido, Japan, and the first fossil occurrences of Kubaninella and Hayamiellina gen. nov," Paleontological Research 8(3), 167-179, (1 October 2004). https://doi.org/10.2517/prpsj.8.167

Received: 16 October 2003; Accepted: 1 July 2004; Published: 1 October 2004

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