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    Publication Date: 2011-01-08
    Description: Ammonites are prominent in macroevolutionary studies because of their abundance and diversity in the fossil record, but their paleobiology and position in the marine food web are not well understood due to the lack of preserved soft tissue. We present three-dimensional reconstructions of the buccal apparatus in the Mesozoic ammonite Baculites with the use of synchrotron x-ray microtomography. Buccal mass morphology, combined with the coexistence of food remains found in the buccal mass, suggests that these ammonites fed on plankton. This diet may have extended to all aptychophoran ammonites, which share the same buccal mass morphology. Understanding the role of these ammonites in the Mesozoic food web provides insights into their radiation in the Early Jurassic, as well as their extinction at the end of the Cretaceous/early Paleogene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kruta, Isabelle -- Landman, Neil -- Rouget, Isabelle -- Cecca, Fabrizio -- Tafforeau, Paul -- New York, N.Y. -- Science. 2011 Jan 7;331(6013):70-2. doi: 10.1126/science.1198793.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉UMR-CNRS 7207, Departement Histoire de la Terre, Museum National d'Histoire Naturelle, 47 rue Cuvier, 75231 Paris Cedex 05, France. kruta@mnhn.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21212354" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Cephalopoda/*anatomy & histology/physiology ; Diet ; Digestive System ; Extinction, Biological ; Feeding Behavior ; *Food Chain ; *Fossils ; Gastropoda/anatomy & histology ; Isopoda/anatomy & histology ; Jaw/anatomy & histology ; Tooth/anatomy & histology ; X-Ray Microtomography ; *Zooplankton
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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