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. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source |
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