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Keywords from Image Description:
Diplopteridium holdenii. Fossil of the exinct plant species Diplopteridium holdenii Pteridospermopsida from the Asbian chronozone Lower Carboniferous of England at Drybrook Rock is about cm long Collection of the Universiteit Utrecht Fossile d'une espce teinte de plante Diplopteridium holdenii Pteridospermopsida de la priode Asbienne