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Four new species of the Jurassic to Cretaceous seep-restricted bivalve Caspiconcha and implications for the history of chemosynthetic communities

Published online by Cambridge University Press:  02 April 2018

Robert G. Jenkins
School of Natural System, College of Science and Engineering, Kanazawa University, Kanazawa City, Ishikawa Prefecture 920-1192, Japan 〈〉
Andrzej Kaim
Institute of Paleobiology, Polish Academy of Sciences, ul. Twarda 51/55, PL−00−818 Warszawa, Poland 〈〉
Yoshinori Hikida
Nakagawa Museum of Natural History, 28-9 Yasukawa, Nakagawa Town, Hokkaido 098-2626, Japan 〈〉
Steffen Kiel
Swedish Museum of Natural History, Department of Palaeobiology, Box 500 07 104 05 Stockholm, Sweden 〈〉


Four new species of the methane seep-inhabiting kalenterid bivalve genus Caspiconcha Kelly in Kelly et al., 2000 are described: Caspiconcha basquensis from the late Albian of northern Spain, C. yubariensis from the late Albian of northern Japan, C. raukumaraensis from the late Albian to mid-Cenomanian of New Zealand, and C. lastsamurai from the Campanian of northern Japan. The earliest confirmed record of the genus is known from the latest Jurassic. It reached its maximum diversity in the Albian and declined in diversity and abundance through the Late Cretaceous. The youngest species, C. lastsamurai, is currently known from a single specimen only.


Copyright © 2018, The Paleontological Society 

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Four new species of the Jurassic to Cretaceous seep-restricted bivalve Caspiconcha and implications for the history of chemosynthetic communities
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