科研之友
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摘要
A new genus and a new species of the gastropod superfamily Buccinoidea, Urahorosphaera kanekoi, is described from the Paleocene Katsuhira Formation in eastern Hokkaido, Japan. This species comprises the first Paleocene record of buccinoid gastropods in Japan and originates from relatively deep-water deposits, which makes it very unique among all Paleocene buccinoidean gastropods in the North Pacific. This occurrence may suggest a trace of bucciniform gastropods diversification similar to the pattern found for the Southern Hemisphere.
- 出版日期2014-12-31
