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  • Articulate Brachiopod


    Images:

    DPS Ammonite

    Taxonomy

    Articulate Brachiopod

    Kingdom: Animalia
    Phylum: Brachiopoda
    Class: Rhynchonellata
    Order: Athyridida
    Family: Athyrididae
    Genus: Cleiothyridina
    Species: Cleiothyridina orbicularis
    Author Citation McChesney 1859

    Geological Time Scale

    Eon: Phanerozoic
    Era: Paleozoic
    Period: Carboniferous
    Sub Period: Pennsylvanian
    Epoch: Late

    Stratigraphy

    Graham Formation
    Finis Shale Member

    Provenance

    Collector: me
    Acquired by: Field Collection

    Dimensions

    Length: 18 mm
    Width: 16 mm

    Location

    Jacksboro Reservoir Dam spillway
    Jack County
    Texas
    United States

    Comments

    This is a less common brachiopod collected at the rich Finis Shale site in the spillway of the Jacksboro Reservoir. It is often confused with the more common Composita subtilita which has a stronger sulcus fold and no small spines.




    User Feedback


    Tidgy's Dad

    Posted

    Oh, yes, I see the tidgy spines. 

    A lovely rare specimen. 

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