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  • Physogaleus contortus


    Images:

    fossilhunter21

    Taxonomy

    Physogaleus contortus

    Kingdom: Animalia
    Phylum: Chordata
    Class: Chondrichthyes
    Order: Carcharhiniformes
    Family: Carcharhinidae
    Genus: Physogaleus
    Species: Physogaleus contortus
    Author Citation (Gibbes, 1849)

    Geological Time Scale

    Eon: Phanerozoic
    Era: Cenozoic
    Period: Neogene
    Sub Period: None
    Epoch: Miocene

    Stratigraphy

    Pungo River Formation

    Provenance

    Collector: Fossilhunter21 (Micah)
    Date Collected: 12/20/2021
    Acquired by: Purchase/Trade

    Dimensions

    Length: 0.5 "

    Location

    Lee Creek Phosphate Mine
    Aurora
    North Carolina
    United States

    Comments

     

    This specimen was found in micro matrix purchased from the Aurora, North Carolina Fossil Museum. 

     

    Description:

    Teeth are very similar to the genus Galeocerdo

    with finely serrated, long, thick and warped crowns; pronounced notch, small serrations on heel of distal side. Undulating margin

    and fine serrations on mesial edge. U-shaped root with a prominent protuberance on lingual face and transverse groove (Fig. 5.10).

    Physogaleus contortus differs from the genus Galeocerdo in

    having very prominent and bulging root with the deep notch, and a much more erect crown in lateral view. (Leder, 2005)

     

    References: 

    THE NEOGENE SHARKS, RAYS, AND BONY FISHES FROM LEE CREEK MINE, AURORA, NORTH CAROLINA, Geology and Paleontology of the Lee Creek Mine, North Carolina, III. pgs 146-147 Figure 50 by Robert W. Purdy, Vincent P. Schneider, Shelton P. Applegate, Jack H. McLellan, Robert L. Meyer, and Bob H. Slaughter.

     

    B. W. Kent. 2018. The Cartilaginous Fishes (Chimaeras, Sharks, and Rays) of Calvert Cliffs, Maryland, USA. In S. J. Godfrey (ed.), Smithsonian  : Contributions to Paleobiology 100 : pgs. 110-111 FIG.2.21 e,f,h (PG. 109)



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