Morphogenetical transition between the genera Neuropteris (Brongniart) and Reticulopteris Gothan in Dobrudža Coal basin

Neuropteris obliqua (Brongniart), N. semireticulata Josten and Reticulopteris münsteri (Eichwald) from Dobrudia Coal Basin are described and illustrated. The transition from feather veining (genus Neuropteris) to a reticulated one (genus Reticulopteris) occurred here at the beginning of WestphalianC. A time correlation of these transitions and of the appearance-disappearance events of the species, discussed above, in the basins where they have been established to coexist – Ruhr, Nord et Pas-de-Calais. Campigne, Charlesle-Roi and Dobrudza - is made.