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  • T. rex tooth


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    ThePhysicist

    Taxonomy

    T. rex

    Kingdom: Animalia
    Phylum: Chordata
    Class: Reptilia
    Order: Avetheropoda
    Family: Tyrannosauridae
    Genus: Tyrannosaurus
    Species: Tyrannosaurus rex
    Author Citation Osborn, 1905

    Geological Time Scale

    Eon: Phanerozoic
    Era: Mesozoic
    Period: Cretaceous
    Sub Period: None
    Epoch: Late

    Stratigraphy

    Hell Creek Formation

    Provenance

    Acquired by: Purchase/Trade

    Dimensions

    Width: 11 mm
    Height: 15 mm
    Thickness: 5.5 mm

    Location

    Fallon County
    Montana
    United States

    Comments

    Identification

    This is a classic T. rex tooth. It's clearly Tyrannosaurid by its robusticity, similar serration densities on each carina (mesial carina counted by the "roots" of the denticles as they are completely worn off), and chisel-shaped serrations. Those qualities with its locality and formation mean it must be the one and only.

    Notes

    The Crown Height Ratio (CHR) suggests a posterior position (it's short and stout). There's evidence of wear on the tip and mesial carina.



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