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The belemnites went extinct in the Cretaceous, or at least that's the scientific consensus. This information is included within references cited in this article, other than an encyclopedia note and an old textbook recently added. Check out the modern Tree of Life citation: http://tolweb.org/Coleoidea/19400 . It is quite possible they lived until the Eocene, but until a scientific article (not a textbook, not an encyclopedia, not a website) can be cited in support of this, we should leave it at belemnites extinct at the end of the Cretaceous. If you want to extend the range, please supply the appropriate references. Note that in the past some fossils were included among the belemnites but were then removed. Maybe that's the confusion here. Wilson44691 (talk) 15:56, 6 March 2014 (UTC)