New observations on the holopodid crinoid genus Cyathidium Steenstrup from the lower Turonian of the Bohemian Cretaceous Basin, Czech Republic

作者: Jiří Žítt , Radek Vodrážka , Kamil Zágoršek

DOI: 10.1016/J.CRETRES.2014.05.019

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摘要: Abstract New observations on Cyathidium aff. depressum Sieverts from the lower Turonian of Bohemian Cretaceous Basin are presented. The growth individual thecae (three different modes) and fusion primibrachials (IBr 1 IBr 2 ), as well taphonomy, palaeoecology sedimentary environment have been studied. Thecae often encrusted by numerous episkeletozoans with a predominance bryozoans. Skeletal features present material (thecae, brachials) morphologically differ in part those typical C. depressum upper Cenomanian northwest Germany, similarities to C. holopus middle Danian Denmark apparent.

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