• Matt Croxton posted an update 6 years ago

    6 years ago
    6 years ago

    @jkallmeyer
    Hi Jack,
    I will post my interpretation of the mud impressions as an additional image with that fossil. As I haven’t seen the literature, I’m relying on memory, and the Ordovician Atlas (http://www.ordovicianatlas.org/atlas/ichnofossils/).

  • Matt Croxton posted a new specimen. 6 years ago

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    6 years ago

    Matt Croxton has contributed specimen mFeM 50079 to myFOSSIL!

  • Matt Croxton updated their own Fossil #006892 6 years ago

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  • Matt Croxton updated their own Fossil #006892 6 years ago

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  • Matt Croxton updated their own Fossil #006892 6 years ago

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  • Matthew Croxton uploaded a new image to Fossil #006892 6 years ago

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  • Matt Croxton updated their own Fossil #006892 6 years ago

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  • Matt Croxton updated their own Fossil #006892 6 years ago

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  • Matt Croxton created a Fossil #006892 6 years ago

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    A new fossil has been added. Thank you for contributing!

  • Matthew Croxton uploaded a new image to Fossil #006813 6 years ago

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  • 6 years ago

    @rleder

    Hi Ronny,

    I use a Voigtländer 90mm f/3.5 SL II APO-LANTHAR lens, usually stopped down to f/8 or f/9. While this lens is out of production for Nikon and Pentax mounts, it is still available for Canon. Scroll to the bottom of this page for more information on the optic. Please be aware that this lens is manual focus only, and is adjusted…[Read more]

  • Matt Croxton and Profile picture of Victor PerezVictor Perez are now friends 6 years ago

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  • Matt Croxton and Profile picture of Rebecca BrewerRebecca Brewer are now friends 6 years ago

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  • Matt Croxton commented on their own Fossil #006776 6 years ago

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    This ichnofossil contains what a Dry Dredgers pamphlet identifies as a scolecodont – a microfossil that is part of a marine oligochaete’s chewing apparatus. The size (shown in the secondary image) is just shy of 2mm.

  • Matt Croxton updated their own Fossil #006704 6 years ago

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    {“post_type”:”myfossil_taxa”,”changeset”:[{“key”:”taxon_id_common”,”from”:”6853″,”to”:”6869″},{“key”:”taxon_id_kingdom”,”from”:”6854″,”to”:”6870″},{“key”:”taxon_id_phylum”,”from”:”6855″,”to”:”6871″},{“key”:”taxon_id_class”,”from”:”6856″,”to”:”6872″},{“key”:”taxon_id_order”,”from”:”6857″,”to”:”6873″},{“key”:”taxon_id_family”,”from”:”6858″,”to”:”6874…[Read more]

  • Matt Croxton updated their own Fossil #006686 6 years ago

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    6 years ago

    {“post_type”:”myfossil_taxa”,”changeset”:[{“key”:”taxon_id_common”,”from”:”6845″,”to”:”6861″},{“key”:”taxon_id_kingdom”,”from”:”6846″,”to”:”6862″},{“key”:”taxon_id_phylum”,”from”:”6847″,”to”:”6863″},{“key”:”taxon_id_class”,”from”:”6848″,”to”:”6864″},{“key”:”taxon_id_order”,”from”:”6849″,”to”:”6865″},{“key”:”taxon_id_family”,”from”:”6850″,”to”:”6866…[Read more]

  • Matt Croxton commented on their own Fossil #006760 6 years ago

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    6 years ago

    I have provided an enlargement of the siphuncle. If you can provide a better ID by getting a good look at this structure, I’d appreciate the info!

    • I only know of one species of Orthonybyoceras – O. dyeri. In the same family is Treptoceras duseri. I’m not entirely sure how to best distinguish between them and I think they both can be found in the Grant Lake Fm. Any advice from other Ordovician folks? @jkallmeyer @kyle-hartshorn @bheimbrock

      • My apologies for not replying sooner. No reply for me means “I don’t know”. At times, these two were thought to be synonymous. I think that Treptoceras is more common and has a wider range. I’ll have to look dig into some siphuncle photos and see if I can tell the difference. Thanks for asking! @jbauer @matthew-croxton

  • Matt Croxton posted an update 6 years ago

    6 years ago
    6 years ago

    @jkallmeyer Thank you very much for the ID assistance! I was closer than expected with some. I’m donating these for use at my school, so I’m very glad to have them imaged and documented prior to classroom use. 🙂

  • Matt Croxton updated their own Fossil #006704 6 years ago

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    {“post_type”:”myfossil_taxa”,”changeset”:[{“key”:”taxon_id_common”,”from”:”6705″,”to”:”6853″},{“key”:”taxon_id_kingdom”,”from”:”6706″,”to”:”6854″},{“key”:”taxon_id_phylum”,”from”:”6707″,”to”:”6855″},{“key”:”taxon_id_class”,”from”:”6708″,”to”:”6856″},{“key”:”taxon_id_order”,”from”:”6709″,”to”:”6857″},{“key”:”taxon_id_family”,”from”:”6710″,”to”:”6858…[Read more]

  • Matt Croxton updated their own Fossil #006686 6 years ago

    6 years ago
    6 years ago

    {“post_type”:”myfossil_taxa”,”changeset”:[{“key”:”taxon_id_common”,”from”:”6687″,”to”:”6845″},{“key”:”taxon_id_kingdom”,”from”:”6688″,”to”:”6846″},{“key”:”taxon_id_phylum”,”from”:”6689″,”to”:”6847″},{“key”:”taxon_id_class”,”from”:”6690″,”to”:”6848″},{“key”:”taxon_id_order”,”from”:”6691″,”to”:”6849″},{“key”:”taxon_id_family”,”from”:”6692″,”to”:”6850…[Read more]

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