naa a22 4500 510808662 CHVBK 20180411083430.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s12542-013-0182-4 doi (NATIONALLICENCE)springer-10.1007/s12542-013-0182-4 First record of a complete arm crown of the Early Jurassic coleoid Loligosepia (Cephalopoda) [Elektronische Daten] [Dirk Fuchs, Helmut Keupp, Günter Schweigert] The higher rank systematics of coleoid cephalopods are primarily based on the total number of arms. Completely preserved arm crows are, therefore, the most important character complex by which fossil representatives can be assigned to higher taxa. Whereas belemnoids—similar to modern Decabrachia—are well-known to have ten hooklet-bearing arms, recent studies have shown that Middle-Late Jurassic and Late Cretaceous gladius-bearing coleoids belong to the Vamyropoda, owing to having only eight hooklet-free arms. The arm number of Early Jurassic gladius-bearing coleoids was unclear for a long time. This paper, however, reports the first unequivocally complete arm crown from the Early Jurassic (Toarcian). It consists of eight strongly phosphatised arms of equal shape. Affinity with decabrachiate coleoids is therefore unlikely. The mantle sack of the specimen, which was identified as Loligosepia aalensis (Schübler in Zieten, 1832), has, furthermore, an unusual arrangement of numerous angular pieces. The irregular scattering of the mantle fragments was most probably caused by a scavenger. Finally, hooklets in the food residues in the posterior mantle indicate that Loligosepia preyed upon belemnites. Springer-Verlag Berlin Heidelberg, 2013 Early Jurassic nationallicence Loligosepia nationallicence Vampyropoda nationallicence Coleoidea nationallicence Soft part preservation nationallicence Arm crown nationallicence Früher Jura nationallicence Loligosepia nationallicence Vampyropoda nationallicence Coleoidea nationallicence Weichteilerhaltung nationallicence Armkrone nationallicence Fuchs Dirk Freie Universität Berlin, Institut für Geologische Wissenschaften (Fachrichtung Paläontologie), Malteserstr. 74-100, Haus D, 12249, Berlin, Germany aut Keupp Helmut Freie Universität Berlin, Institut für Geologische Wissenschaften (Fachrichtung Paläontologie), Malteserstr. 74-100, Haus D, 12249, Berlin, Germany aut Schweigert Günter Staatliches Museum für Naturkunde Stuttgart, Rosenstein 1, 70191, Stuttgart, Germany aut Paläontologische Zeitschrift Springer Berlin Heidelberg 87/3(2013-09-01), 431-435 0031-0220 87:3<431 2013 87 12542 https://doi.org/10.1007/s12542-013-0182-4 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12542-013-0182-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fuchs Dirk Freie Universität Berlin, Institut für Geologische Wissenschaften (Fachrichtung Paläontologie), Malteserstr. 74-100, Haus D, 12249, Berlin, Germany aut NATIONALLICENCE 700 1- Keupp Helmut Freie Universität Berlin, Institut für Geologische Wissenschaften (Fachrichtung Paläontologie), Malteserstr. 74-100, Haus D, 12249, Berlin, Germany aut NATIONALLICENCE 700 1- Schweigert Günter Staatliches Museum für Naturkunde Stuttgart, Rosenstein 1, 70191, Stuttgart, Germany aut NATIONALLICENCE 773 0- Paläontologische Zeitschrift Springer Berlin Heidelberg 87/3(2013-09-01), 431-435 0031-0220 87:3<431 2013 87 12542 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer