Aspects of Romanian Early Jurassic palaeobotany and palynology. Part II. A new species of Pachypteris from Cristian.
The Lower Jurassic (Sinemurian) deposits of Cristian (Brasov County, Romania) contain a well-preserved land flora. Pachypteris gradinarui n.sp., a new species of seed fern foliage belonging to the Corystospermales, is described, figured and analysed. The species has a bipinnate, petioled frond; secondary rachises inserted on the upper side of the primary rachis; rounded, occasionally lobed pinnules without marked abaxial thickening or folding. The material is compared with other Pachypteris species, and with Cycadopteris, a related genus characterised by marginal (cuticular) thickening and folding, as it presents transitional characters between the two genera.
Popa
ME
University of Bucharest, Faculty of Geology and Geophysics, Laboratory of Palaeontology, 1 N. Balcescu Avenue, 70111, Bucharest, Romania