Fossil Tree Roots
Stigmaria from the Carboniferous Period. Stigmaria are branching tree root fossils, usually from Sigillaria or Lepidodendron plants. The term "stigmaria" is a form taxon, identifying the shape of the fossil, but not the species. Illustration from Louis Figuier's The World Before the Deluge, 1867 American edition.
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Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
Model Released: No
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