Annularia fossil from the Pennsylvanian Period,Mazon Creek,Illinois. Annularia is the scientific name for the leaf whorls of the horsetail genus Calamites | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Broman, Louise K. |
Bildgröße: | 5084 px × 3439 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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