caa a22 4500 445839422 CHVBK 20180317145339.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00015-010-0032-2 doi (NATIONALLICENCE)springer-10.1007/s00015-010-0032-2 Gaillard Christian Université de Lyon, CNRS, UMR 5125 PaléoEnvironnements et PaléobioSphère, 69622, Lyon, France aut A giant limulid trackway ( Kouphichnium lithographicum ) from the lithographic limestones of Cerin (Late Kimmeridgian, France): ethological and environmental implications [Elektronische Daten] [Christian Gaillard] A well-preserved large limulid trackway related to Kouphichnium lithographicum is described from the Upper Kimmeridgian Lithographic Limestones of Cerin (Ain, France). It is three meters long and exhibits ten successive sets of imprints characterized by a pair of well-preserved tetradactyl external imprints of legs VI (named pushers) and a variable number (mostly three pairs) of straight thin intermediate imprints (legs III-V). The trackway is unusually wide and was probably made by a very large adult approximately 38cm wide and 80cm long when related to the proportions of the modern Limulus polyphemus. The straightness of the trackway, the great repeat distance (stride), the length of series of leg imprints, their slight angle to the mid-line, the well-marked pusher (=leg VI) imprints and the absence of groove made by the telson all indicate fast progression of a vigorous animal on the sea-floor. This walking trackway can be easily differentiated from other limulid crawling, ploughing, and dying trackways usually found in lithographic limestones or other deposits of the geological record. Main characteristics of these different limulid trackways are evidenced. The occurrence of a living adult in the Cerin restricted lagoon is probably related to a brief period of connection with the open sea. This occurrence indicates either a passive introduction of the animal into the lagoon or a spawning behaviour. Swiss Geological Society, 2010 Kouphichnium nationallicence Limulid trackway nationallicence Late Jurassic nationallicence Cerin lithographic limestones nationallicence Ethology nationallicence Palaeoenvironment nationallicence Swiss Journal of Geosciences SP Birkhäuser Verlag Basel 104(2011-12-01), 57-72 1661-8726 104<57 2011 104 15 https://doi.org/10.1007/s00015-010-0032-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00015-010-0032-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Gaillard Christian Université de Lyon, CNRS, UMR 5125 PaléoEnvironnements et PaléobioSphère, 69622, Lyon, France aut NATIONALLICENCE 773 0- Swiss Journal of Geosciences SP Birkhäuser Verlag Basel 104(2011-12-01), 57-72 1661-8726 104<57 2011 104 15 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer