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  • Staufenia staufensis (Oppel 1856)


    Images:

    Ludwigia

    Taxonomy

    Ammonite

    Kingdom: Animalia
    Phylum: Mollusca
    Class: Cephalopoda
    Order: Ammonitida
    Family: Graphoceratidae
    Genus: Staufenia
    Species: Staufenia staufensis
    Author Citation Oppel 1856

    Geological Time Scale

    Eon: Phanerozoic
    Era: Mesozoic
    Period: Jurassic
    Sub Period: None
    Epoch: Middle
    International Age: Late Aalenian

    Stratigraphy

    Achdorf Formation

    Provenance

    Collector: Roger Furze
    Date Collected: 08/11/2012
    Acquired by: Field Collection

    Dimensions

    Diameter: 23 cm

    Location

    Scheffheu Section
    Wutachtal
    Baden-Wuerttemberg
    Germany

    Comments

    The samples of this species at this site are practically impossible to extract in one piece due to the large size and the discus-like shape of the fossil and also to the hardness and cleavage of the matrix. Therefore this one was extracted in several pieces which were then glued back together. All remaining cracks and crevices were then filled in with stonemeal. What we see here is just a complete phragmocone, which is apparent through the suture lines visible on the calcite mold seen in the second photo, where the shell broke off during extraction. The complete creature with body chamber probably had a diameter of ca. 40cm. This is the index fossil of this particular horizon. An Homaloteuthis sp. belemnite rostrum is attached at the mouth aperture.

     

    Biostratigraphy: Bradfordensis Zone, bradfordensis subzone, staufensis bank

    Old German Chronostratigraphy: Dogger (Braunjura) beta

    Literature: Rieber,H. (1963): Ammoniten und Stratigraphie des Braunjura beta der Schwaebischen Alb, Palaeontographica Bd.122,Abt.A, Pp.1-89




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