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  • Asaphus punctatus


    Images:

    Kane
    • Specimen is prone with slight raising of cephalon in seabed burial position. 

       

      Excerpt from:

      Ivanstov, A. Yu. (2003) "Ordovician Trilobites of the Subfamily Asaphinae of the Ladoga Glint." Paleontological Journal v. 37, supp. 3

       

      H o l o t y p e (monotype). DPStPSU, no. 580/9243, 

       

      D i a g n o s i s . Cephalon medium-proportionate, without beaklike bend, glabella not reaching anterior margin; basal lobes lenslike; mdiments of glabellar lobes absent; occipital furrow deep; paradoublural furrows absent; cranidium with broad short lingula; marginal bend of anterior branch of facial suture rounded; bend of eye base reverse; eyes medium-long, high, removed from posterior margin for about half of their length; eye pedicles short and thick; eye lists present; ocular areas not elevated above cephalon or convex, with tubercles; occipital ring convex; pygidium medium-proportionate or weakly elongated; with rounded lateral margins and posterior end, rachis faintly subdivided; terracelike folds present on anterior part of frontal lobe and absent from librigenae. 

    Taxonomy

    Kingdom: Animalia
    Phylum: Arthropoda
    Class: Trilobita
    Order: Asaphida
    Family: Asaphidae
    Genus: Asaphus
    Species: A. punctatus
    Author Citation Lesnikova, 1949

    Geological Time Scale

    Eon: Phanerozoic
    Era: Paleozoic
    Period: Ordovician
    Epoch: Middle
    International Age: Darriwilian

    Stratigraphy

    Duboviki

    Biostratigraphy

    Upper Kotlukovi-Punctatus
    Aseri

    Provenance

    Date Collected: 02/28/2018
    Acquired by: Purchase/Trade

    Dimensions

    Blank: 85mm
    Width: 56mm

    Location

    Lomaha Quarry
    St Petersburg
    Russia

    Comments

    Specimen is prone with slight raising of cephalon in seabed burial position. 

     

    Excerpt from:

    Ivanstov, A. Yu. (2003) "Ordovician Trilobites of the Subfamily Asaphinae of the Ladoga Glint." Paleontological Journal v. 37, supp. 3

     

    H o l o t y p e (monotype). DPStPSU, no. 580/9243, 

     

    D i a g n o s i s . Cephalon medium-proportionate, without beaklike bend, glabella not reaching anterior margin; basal lobes lenslike; mdiments of glabellar lobes absent; occipital furrow deep; paradoublural furrows absent; cranidium with broad short lingula; marginal bend of anterior branch of facial suture rounded; bend of eye base reverse; eyes medium-long, high, removed from posterior margin for about half of their length; eye pedicles short and thick; eye lists present; ocular areas not elevated above cephalon or convex, with tubercles; occipital ring convex; pygidium medium-proportionate or weakly elongated; with rounded lateral margins and posterior end, rachis faintly subdivided; terracelike folds present on anterior part of frontal lobe and absent from librigenae. 



    User Feedback


    Tidgy's Dad

    Posted · Report

     Never mind the science (well a bit). 

    That's a beautiful thing! :)

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    1 hour ago, Tidgy's Dad said:

     Never mind the science (well a bit). 

    That's a beautiful thing! :)

    Thank you, Adam, you are too kind :). It definitely occupies premium space in my little trilobitarium. :D 

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    Tidgy's Dad

    Posted · Report

    10 minutes ago, Kane said:

    Thank you, Adam, you are too kind :). It definitely occupies premium space in my little trilobitarium. :D 

     

    10 minutes ago, Kane said:

    Thank you, Adam, you are too kind :). It definitely occupies premium space in my little trilobitarium. :D 

    Somehow, I am not particularly surprised. 

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