Abstract
In the Tournaisian deposits of southern Ireland, Cyrtospora cristifer (Luber) nov. comb. et emend. Van der Zwan, Ceratosporites sp.A (present paper) and Mooreisporites sp.A. (present paper) are regular components. These species show continuous variation. In order to emphasize such a variation, the morphon concept is here established. This concept is
... read more