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  • Eldredgeops rana


    • Prepared and photographed by Jay A. Wollin. © 2016


    Eldredgeops rana

    Kingdom: Animalia
    Phylum: Arthropoda
    Class: Trilobita
    Order: Phacopida
    Family: Phacopidae
    Genus: Eldredgeops
    Species: E. rana
    Author Citation (Green, 1832)

    Geological Time Scale

    Eon: Proterozoic
    Era: Paleozoic
    Period: Devonian
    Epoch: Middle
    International Age: ~380 MYA


    Hamilton Group
    Moscow Formation
    Windom Member


    Collector: Jay A. Wollin
    Date Collected: 06/01/2016
    Acquired by: Field Collection


    Blank: 3cm
    Width: 1.5cm
    Height: .4cm


    Penn Dixie
    New York
    United States


    Prepared and photographed by Jay A. Wollin. © 2016

    User Feedback

    The correct citation is: Eldredgeops rana (Green, 1832)


    The parentheses around the author citation indicate it is not the original taxonomic placement. 

    Green originally classified it as Calymene.  Emmrich 1839 subsequently established Phacops.

    Although Struve 1990 established the genus Eldredgeops, Green 1832 always retains priority. 


    Green, J.M. (1832)
    Monograph of the trilobites of North America: with coloured models of the species.
    J. Brano Publishing, Philadelphia, 93 pp.


    Emmrich, H.F. (1839)

    De Trilobitis: Dissertatio petrefactologica quam concensu et auctoritate amplissimi philosophorum ordinis.

    Berolini: Berlin, 56 pp.


    Struve, W. (1990)
    Paläozoologie III (1986-1990).

    Courier Forschungsinstitut Senckenberg, 127:251-279


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    Posted · Report

    I have updated it. Is it correct now?


    Thank you for clarifying! I was wondering about that when I was filling in the field, but didn't honestly know which to cite.

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