Fig. 7
From: Genus Pronephrium Presl 1851 (Thelypteridaceae) in Romania
Pronephrium stiriacum, fertile fragment, from Lupeni sterile dump, Oligocene, Petroșani Basin. a Fragment of a fertile pinnule, showing the midrib (M), secondary veins, tertiary veins, connecting veins and sori; b Detail of the same fertile fragment, with arrows indicating the poorly preserved sori. Hand specimen UPLU0010, University of Petroșani. Scale bars: 1 mm