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Permian:
299-251 Million Years Ago
Gallery:
Brazil, South America
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Tree Fern
Psaronius
sinuosus
Bieland,
Maranhao Province, Brazil
Pedra de Fogo Formation
Permian
9 cm x 7 cm
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Below
one can see the tranistion zone between the central vascular
tissue and root mantle of Psaronius sinuosus. |
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