First record of non-mineralized cephalopod jaws and arm hooks from the latest Cretaceous of Eurytania, Greece

Swiss Journal of Palaeontology

卷:139

Donald Davesne¹  Christian Klug²  Dirk Fuchs³  Thodoris Argyriou⁴ 

[1] Department of Earth Sciences, University of Oxford;

[2] Paläontologisches Institut Und Museum, Universität Zürich;

[3] SNSB-Bayerische Staatssammlung für Paläontologie und Geologie;

[4] UMR 7207 (MNHN - Sorbonne Université - CNRS) Centre de Recherche en Paléontologie - Paris, Muséum National D’Histoire Naturelle;

关键词: Cephalopoda;    Ammonoidea;    Desmoceratoidea;    Coleoidea;    Maastrichtian;    Taphonomy;   

DOI  :  10.1186/s13358-020-00210-y

来源: DOAJ

【 摘 要 】

Abstract Due to the lower fossilization potential of chitin, non-mineralized cephalopod jaws and arm hooks are much more rarely preserved as fossils than the calcitic lower jaws of ammonites or the calcitized jaw apparatuses of nautilids. Here, we report such non-mineralized fossil jaws and arm hooks from pelagic marly limestones of continental Greece. Two of the specimens lie on the same slab and are assigned to the Ammonitina; they represent upper jaws of the aptychus type, which is corroborated by finds of aptychi. Additionally, one intermediate type and one anaptychus type are documented here. The morphology of all ammonite jaws suggest a desmoceratoid affinity. The other jaws are identified as coleoid jaws. They share the overall U-shape and proportions of the outer and inner lamellae with Jurassic lower jaws of Trachyteuthis (Teudopseina). We also document the first belemnoid arm hooks from the Tethyan Maastrichtian. The fossils described here document the presence of a typical Mesozoic cephalopod assemblage until the end of the Cretaceous in the eastern Tethys.

【 授权许可】

Unknown