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Artiodactyls (Even-toed Ungulates)

Artiodactyls, also known as even-toed ungulates, are a group of mammals with an evolutionary history starting in the early Eocene (55.4 mya). They are characterized by an even number of toes on each foot, a feature that distinguishes them from other mammals. This group has diversified over time, giving rise to a wide range of animals, including deer, antelopes, camels, bison, peccaries and more. These animals have adapted to various environments and play vital roles in ecosystems as herbivores, influencing plant communities and serving as prey for carnivores.

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    • Didelphis virginiana Pelvic Bone

      By C2fossils · Posted

      Yeah I understand now. And yes you are right it is most definitely Didelphis Virginiana.
    • Didelphis virginiana Pelvic Bone

      By Jaybot · Posted

      This would be Didelphis sp. not 'Opossum sp.'  Opossum is the common name.
      It's likely Didelphis virginiana
    • The Famous Winterset Composita Layer

      By Tidgy's Dad · Posted

      Very nice indeed.
      And, yes, the lophophore is an organ and soft and does not preserve except in exceptional circumstances.
      The supports for the lophophore are what are sometimes preserved.
    • The Famous Winterset Composita Layer

      By Samurai · Posted

      Thank you! This was a site I hunted a few times when I was a kid and my "starting" area. Sadly most of it is now overgrown but it's still producing good finds. Also I have now corrected the terminology, as I wasn't too familiar with internal preservation and anatomy. I have now uploaded it in the album!
    • The Famous Winterset Composita Layer

      By Collector9658 · Posted

      Awesome plate. Have always wanted to collect a slab of those from that locality, but I haven't had a chance yet to get back and collect around the KC area. Look forward to seeing the brachiopod with the brachidium.
    • Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

      By Barrelcactusaddict · Posted

      Correction (May 6, 2024):
       
      I would more accurately list the insects in this piece as being within the Pseudomyrmecini tribe; modern distribution of its members would possibly suggest a Tetraponera sp. rather than Pseudomeyrmex.
       
      Also, after conferring with the seller of the amber itself, this material was mined from lignite deposits associated with the Gumai, Air Benakat, and Muara Enim Formations of the South Sumatra Basin: these range in age from 30-6.3 Ma.
    • Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

      By Barrelcactusaddict · Posted

      Correction (May 6, 2024):
       
      I would more accurately list the insects in this piece as being within the Pseudomyrmecini tribe; modern distribution of its members would possibly suggest a Tetraponera sp. rather than Pseudomeyrmex.
       
      Also, after conferring with the seller of the amber itself, this material was mined from lignite deposits associated with the Gumai, Air Benakat, and Muara Enim Formations of the South Sumatra Basin: these range in age from 30-6.3 Ma.
    • Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

      By Barrelcactusaddict · Posted

      Correction (May 6, 2024):
       
      I would more accurately list the insects in this piece as being within the Pseudomyrmecini tribe; modern distribution of its members would possibly suggest a Tetraponera sp. rather than Pseudomeyrmex.
       
      Also, after conferring with the seller of the amber itself, this material was mined from lignite deposits associated with the Gumai, Air Benakat, and Muara Enim Formations of the South Sumatra Basin: these range in age from 30-6.3 Ma.
    • Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

      By Barrelcactusaddict · Posted

      Correction (May 6, 2024):
       
      I would more accurately list the insects in this piece as being within the Pseudomyrmecini tribe; modern distribution of its members would possibly suggest a Tetraponera sp. rather than Pseudomeyrmex.
       
      Also, after conferring with the seller of the amber itself, this material was mined from lignite deposits associated with the Gumai, Air Benakat, and Muara Enim Formations of the South Sumatra Basin: these range in age from 30-6.3 Ma.
    • Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

      By Barrelcactusaddict · Posted

      Correction (May 6, 2024):
       
      I would more accurately list the inclusions (workers and alates) in this piece as being within the Pseudomyrmecini tribe; modern distribution of its members would possibly suggest a Tetraponera sp. rather than Pseudomeyrmex.
       
      Also, after conferring with the seller of the amber itself, this material was mined from lignite deposits associated with the Gumai, Air Benakat, and Muara Enim Formations of the South Sumatra Basin: these range in age from 30-6.3 Ma.
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