controls on gut phosphatisation the trilobites from the weeks formation lagerst？tte (cambrian; utah)周形成的三叶虫有控制肠道磷化lagerst tte(寒武纪;.pdfVIP

Controls on Gut Phosphatisation: The Trilobites from the ¨ Weeks Formation Lagerstatte (Cambrian; Utah) 1 2,3 4 4 ¨ 5 Rudy Lerosey-Aubril *, Thomas A. Hegna , Carlo Kier , Enrico Bonino , Jorg Habersetzer , Matthieu ´6 Carre 1 Department of Palaeontology and Historical Geology, Senckenberg Research Institute, Frankfurt am Main, Germany, 2 Department of Geology and Geophysics, Yale University, New Haven, Connecticut, United States of America, 3 Department of Geology, Western Illinois University, Macomb, Illinois, United States of America, 4 Back to the Past Museum, Puerto Morelos, Quintana Roo, Mexico, 5 Department of Palaeoanthropology and Messel Research, Senckenberg Research Institute, Frankfurt am Main, Germany, 6 Institute of Evolutionary Sciences, University Montpellier II, Montpellier, France Abstract ¨ Despite being internal organs, digestive structures are frequently preserved in Cambrian Lagerstatten. However, the reasons for their fossilisation and their biological implications remain to be thoroughly explored. This is particularly true with arthropods – typically the most diverse fossilised organisms in Cambrian ecosystems – where digestive structures represent an as-yet underexploited alternative to appendage morphology for inferences on their biology. Here we describe the ¨ phosphatised digestive structures of three trilobite species from the Cambrian Weeks Formation L