A large branched Arthrodendron species (Foraminifera) from the Ropianka Beds (Senonian- Paleocene) of the Polish Carpathians

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In: Kaminski, M.A. & Filipescu, S., (eds), 2011. Proceedings of the Eighth International Workshop on Agglutinated Foraminifera. Grzybowski Foundation Special Publication 16, 111-114.

A complete specimen of Arthrodendron is described from deep-sea flysch of the Ropianka Beds (Magura Unit) at Wola Brzezińska in the Polish Carpathians. The specimen was originally described by Książkiewicz (1977) as Chondrites flexilis, but it likely constitutes a new species belonging to the genus Arthrodendron Ulrich, 1904. Arthrodendron is a larger agglutinated foraminifer showing regular, tubular chambers that may branch dichotomously. The organism evidently lived as epibenthos on the muddy sea floor. Because of their branching morphology and comparatively large dimensions, larger complete specimens of Arthrodendron have previously been confused with algae and trace fossils. Care should be taken in such cases to resolve the agglutinated wall and chambers of this deep-water agglutinated foraminifer. Some species of Arthrodendron display superficial similarities to some modern komokiaceans, especially to Septuma. Further investigations are needed for clarification of their taxonomic affinities.
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