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First record of true conulariids from the Upper Devonian of Poland
Institution:1. Université de Lille 1, Laboratoire Géosystèmes (UMR 8217 CNRS), UFR Sciences de la Terre, Bâtiment SN5, 59655 Villeneuve d''Ascq cedex, France;2. Institut Royal des Sciences Naturelles de Belgique, DO Terre et Histoire de la Vie, Rue Vautier, 29, 1000 Bruxelles, Belgique;3. Belgique and Université de Liège, Département de Géologie, B-18, Boulevard du Rectorat, Sart-Tilman, 4000 Liège, Belgique;4. Institut Royal des Sciences Naturelles de Belgique, DO Terre et Histoire de la Vie, Service Géologique de Belgique, 13, rue Jenner, 1000 Bruxelles, Belgique;5. Muséum National d''Histoire Naturelle, UMR 7207 CNRS, Buffon Street, 75005 Paris, France;6. 269, rue Charenton, 75012 Paris, France;1. University of Silesia, Faculty of Earth Sciences, Będzińska 60, PL-41-200 Sosnowiec, Poland;2. POLARGEO Inc., 3-7 24th-Line, St. Petersburg 199106, Russia;3. Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstańców Warszawy 55, 81-712 Sopot, Poland;4. The College of Wooster, Department of Geology, Wooster, OH 44691, USA;5. All Russia Petroleum Research Exploration Institute, 39 Liteyny Pr., St. Petersburg 191014, Russia
Abstract:Phosphatized remains indisputably belonging to conulariids have been found in the lower Famennian (Upper Devonian) deposits at the Kowala quarry in the Holy Cross Mountains, Poland for the first time. The ornamentation patterns and characteristics of the exoskeleton indicate that the conulariids, represented by at least two incomplete specimens, belong to a single species within the genus? Paraconularia. Some Polish Ordovician fossils previously described as conulariids either do not possess morphological characters seen in conulariids, or are too fragmentary to be confidently assigned to conulariids. Therefore, the fossils reported here not only represent the first documented record of conulariids in the Devonian of Poland, but the first true conulariids ever reported and illustrated from Poland. The exoskeleton of one specimen possesses at least three sublethal injuries. As the host deposit of marly shale originated in deep water, it is possible that the injuries did not result from purely physical factors, but rather from attempted predation. This interpretation is consistent with the fact that the lower Famennian deposits at Kowala preserve other predation-related structures such as fish coprolites, fragmented arthropod cuticle and regurgitated remains.
Keywords:Conulariida  Upper Devonian  Predation  Sublethal injuries  Holy Cross Mountains  Poland
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