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  • Actinopteria bella


    Images:

    Mainefossils

    Taxonomy

    Kingdom: Animalia
    Phylum: Mollusca
    Class: Bivalvia
    Order: Ostreida
    Family: Pterineidae
    Genus: Actinopteria
    Species: Actinopteria bella
    Author Citation Williams, 1913

    Geological Time Scale

    Eon: Phanerozoic
    Era: Paleozoic
    Period: Silurian
    Sub Period: None
    Epoch: Přídolí

    Stratigraphy

    Leighton Formation

    Provenance

    Collector: Asher Michalski
    Date Collected: 01/24/2021
    Acquired by: Field Collection

    Dimensions

    Length: 10 mm
    Width: 20 mm

    Location

    Penobscot County
    Maine
    United States

    Comments

    Actinopteria bella is a species of bivalve found in the Leighton/Pembroke Fm, and first described by Henry S. Williams. It is differentiated from A. fornicata by less convexity in its shell and a wider beak. It is differentiated from A. dispar by its shorter shell. 
     

    The above pictures are of the left valve. A poorly preserved original or cast of the shell exterior is on the left side.  Some of the exterior of the shell may be missing since the exterior ribs have less than normal height. 

     

    The right photo is an exterior impression or mold. Some of the shell may be present on the right side of the photo.

     

    Williams, Henry Shaler (1913). "New species of Silurian fossils from the Edmunds and Pembroke Formations of Washington County, Maine." Proceedings U.S. National Museum, 45, 319-358.

     

    https://repository.si.edu/bitstream/handle/10088/14399/1/USNMP-45_1985_1913.pdf

     

    Maine Geological Survey (2009). Virtual Tour of Maine's Fossils. https://digitalmaine.com/cgi/viewcontent.cgi?article=1575&context=mgs_publications




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