Stigmaria ficoides,the fossil root stem of a sigillaria plant from the Pennsylvanian Period,Mazon Creek,Illinois | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Broman, Louise K. |
Taille de l’image : | 5071 px × 3448 px |
Model Release : | Non requis |
Restrictions : |
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