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Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?
Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?
Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?
Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?
Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?
Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?
Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?

Extremely rare BIFURCATED Calamites twig extinct horsetail Have You ever seen ?

$ 35.9

Availability: 100 in stock
  • Item must be returned within: 30 Days
  • Return shipping will be paid by: Buyer
  • Restocking Fee: No
  • Condition: New
  • Modified Item: No
  • pre dinosaur fossil plant: Carboniferous Coal age
  • Refund will be given as: Money back or replacement (buyer's choice)
  • All returns accepted: Returns Accepted

    Description

    My specimens are genuine and will be delivered with a "Certificate of authenticity, age and origin"  and scientific papers allowing plant identification !!!
    I combine shipping costs.
    Each item is different, so please wait with payment after purchase -
    I will send You a combine invoice.
    Usually, it will be cost of shipping the heaviest item.
    Specimen
    :  Beautiful specimen of extremely rare BIFURCATED
    bamboo like arborescent horsetail
    Calamites (
    Meso
    calamites ) approximatiformis
    STUR -
    Namurian spercies !
    Locality:
    All detailed and accurate data will be provided with the specimen
    Stratigraphy:
    Upper Carboniferous - Middle Pennsylvanian / Namurian B
    Age:
    ca. 320 Mya
    Matrix dimensions:
    ca. 12,0 x 6,0 x 3,0 cm ( white square on pictures is 1,0 x 1,0 cm )
    Description:
    The trunks of
    Calamites
    had a distinctive segmented, bamboo-like appearance and vertical ribbing. The branches, leaves and cones were all borne in whorls. The leaves were needle-shaped, with up to 25 per whorl.
    Their trunks produced secondary xylem, meaning they were made of wood. The vascular cambium of
    Calamites
    was
    unifacial
    , producing secondary xylem towards the stem center, but not secondary phloem.
    The stems of modern horsetails are typically hollow or contain numerous elongated air-filled sacs.
    Calamites
    was similar in that its trunk and stems were hollow, like wooden tubes. When these trunks buckled and broke, they could fill with sediment. This is the reason pith casts of the inside of
    Calamites
    stems are so common as fossils.
    Calamites
    is a genus of extinct arborescent (tree-like) horsetails to which the modern horsetails (genus
    Equisetum
    ) are closely related.
    Unlike their herbaceous modern cousins, these plants were medium-sized trees, growing to heights of more than 30 meters (100 feet). They were components of the understories of coal swamps of the Carboniferous period.
    Annularia
    are the leaf whorls of an extinct horsetail. They would have grown on plants with stems like
    Calamites
    . A genus of fossil plants; star-leaf: so called from the stellated disposition of the leaves around the branches. They abound in the coal measures, and are believed to be the branches of the
    Calamites
    or
    Calamodendron.
    Systematic:
    Phylum:       Tracheophyta
    Division:       Gymnospermatophyta
    Class:           Equisetinae
    Order:          Calamitales
    Genus:         Mesocalamites
    Species:
    Calamites (
    Meso
    calamites ) approximatiformis
    STUR