Fig. 6

Pronephrium stiriacum from Aninoasa, roof shale of coal seam no. 17, Oligocene, Petroșani Basin. a Details of leaf fragments F1 (abaxial view), F2 (abaxial view) and F3 (apical fragment, adaxial view); b–c Details of pinnules of leaf fragment F1 in abaxial view, showing the primary rachis, petioles, asymmetric bases, venation, dentate margins and missing sori. Hand specimen no. 1, Mining Museum in Petroșani. Scale bar: 10 mm