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BUTW Fossil Silurian Scyphocrinites Crinoid specimen with stand 9633D dl

$ 121.43

Availability: 100 in stock
  • Item must be returned within: 30 Days
  • All returns accepted: Returns Accepted
  • Condition: New
  • Return shipping will be paid by: Buyer
  • Refund will be given as: Money Back
  • Restocking Fee: No
  • animal: Crinoid

    Description

    BUTW Fossil Silurian Scyphocrinites Crinoid specimen with stand 9633D dl
    You get the exact one shown
    Measures about      10"  x    11"   x   1"    thick
    comes with stand shown
    Fossil Crinoid:
    The term, Crinoid, refers to an extant (living) class of echinoderms. These animals, commonly known as "sea lilies" and "feather stars", have a long history.
    They first appear in the fossil record in marine sediments deposited approximately 530 million years ago during the Cambrian Period.
    Stemmed forms are called sea lilies because of their superficial resemblance to flowers. These stemmed Crinoids became abundant in the middle Ordovician Period, 470 million years ago, and flourished in the shallow inland seas of the Paleozoic Era.
    Though so abundant that many late Paleozoic limestone deposits are composed primarily of Crinoid skeletal parts, they nearly became extinct 240 million years ago at the end of the Paleozoic Era.
    Free-moving stemless varieties, called feather stars appeared during the Mesozoic Era approximately 200 million years ago.
    Modern Crinoids:
    Crinoids are neither abundant nor familiar organisms today. However, they dominated the Paleozoic fossil record of echinoderms and shallow marine habitats until the Permo-Triassic extinction, when they suffered a near complete extinction: many Paleozoic limestones are made up largely of
    or "sea lilies", lived attached to the bottom, and filtered food particles from the currents flowing past them. The extant Crinoids are the only remaining attached suspension-feeding echinoderms. This makes them an important group for Paleontologists studying the numerous extinct attached suspension-feeding echinoderms because they have only the living crinoids to examine as an example of this ancient mode of life.
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