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  • Hypsiprisca sp.




    Kingdom: Animalia
    Phylum: Chordata Haeckel 1874
    Class: Actinopteri Cope 1871
    Order: Perciformes Stirton 1953
    Family: incertae sedis
    Genus: Hypsiprisca
    Species: Hypsiprisca sp.

    Geological Time Scale

    Eon: Phanerozoic
    Era: Cenozoic
    Period: Paleogene
    Sub Period: None
    Epoch: Eocene
    International Age: Ypresian


    Green River Formation


    Acquired by: Purchase/Trade


    Length: 50 mm


    United States


    Juvenile Priscacara can be easily distinguished from juvenile Hypsacantha by their distinctly rounder body shape.

    Grande distinguishes two forms of Hypsiprisca: Hypsiprisca hypsacantha (originally described by Cope in 1886 under the name Priscacara hypsacantha) and a second yet undescribed, closely related form Hypsiprisca sp.
    H. sp.
     is more common than H. hypsacantha: H. sp. are mostly very small individuals less than 60mm long.

    Quotation L. Grande (2013): "The second species that remains undescribed differs from H. hypsacantha in being more slender-bodied and having a more convex posterior tail fin margin (H. hypsacantha has a very slightly forked tail margin)."

    Whitlock, J. (2010). Phylogenetic relationships of the Eocene percomorph fishes †Priscacara and †Mioplosus Journal of Vertebrate Paleontology Volume 30 – Issue 4, pages 1037-1048.

    Grande, L. T. (2013). The Lost World of Fossil Lake: Snapshots from Deep Time. University of Chicago Press. ISBN: 13: 978-0-226-92296-6.

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