Platyceramus (French Wikipedia)

Analysis of information sources in references of the Wikipedia article "Platyceramus" in French language version.

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oceansofkansas.com

(en) Oyster-shell coprolites; a stratigraphic marker in the Smoky hill chalk (Upper Cretaceous) of Western Kansas, Kansas Academy of Science, Transactions 11(Abstracts):12.© 2001-2009 by Mike Eberhart 2009, "Biostratigraphically, these shell masses are found in association with the large bivalves Volviceramus grandis and Platyceramus platinum [1]