Structure, habitat and seed of Mariopteris ZEILLER

Abstract

The genus Mariopteris ZEILLER is distributed from the Namurian A to the early Stephanian in Europe. In the Dobrudzha Basin, numerous specimens are found mainly in flood plain claystones and siltstones. The habitat and reconstruction of the plants suggests a creeping manner of growth. Climatic changes are reflected in the architecture of species. One specimen has an attached seed proving the classification of the genus as a pteridosperm.