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    Isotelus "mafritzae"


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    Images:

    Kane

    Taxonomy

    Isotelus "mafritzae" - type "b"

    Kingdom: Animalia
    Phylum: Arthropoda
    Class: Trilobita
    Order: Asaphida
    Family: Asaphidae
    Genus: Isotelus
    Species: I. sp. ("mafritzae")

    Geological Time Scale

    Eon: Phanerozoic
    Era: Paleozoic
    Period: Ordovician
    Epoch: Late

    Stratigraphy

    Simcoe Group
    Lindsay Formation

    Provenance

    Collector: K. Brett
    Date Collected: 05/27/2017
    Acquired by: Purchase/Trade

    Dimensions

    Length: 7cm
    Width: 4cm

    Location

    St Marys Quarry
    Durham Region
    Ontario
    Canada

    Comments

    This species of Isotelus is yet to be formally described. It has been given the provisional species name (suspended under quotation marks) as "mafritzae." There are two known types (A and B ) of I. "mafritzae" that occur exclusively in the Lindsay Formation: Type A have long, slender genal spines, while Type B have none. 

     

    See:

    Rudkin, D.M. & Tripp, R.P. 1987
    A reassessment of the Ordovician trilobite Isotelus, part II: Ontario species.
    Canadian Paleontology and Biostratigraphy Seminar, London, Ontario, Sept. 1987.

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    User Feedback


    FossilDAWG

    Posted · Report

    Very nice specimen!:wub:

     

    I wonder how long it will take before this species is formally described and named.  It seems to me that people have been using "mafritzae" for many years.

     

    Don

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    Kane

    Posted · Report

    1 hour ago, FossilDAWG said:

    Very nice specimen!:wub:

     

    I wonder how long it will take before this species is formally described and named.  It seems to me that people have been using "mafritzae" for many years.

     

    Don

    Thanks! 

     

    I wish I knew! I think it is a matter of money and time. There's not as much interest (or bodies and funding) to give these the additional study and formal description they so deserve.

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