Abstract Detail

Paleobotanical Section

Wang, Jun [2], Pfefferkorn, Hermann [1].

A new Noeggerathia species from the Early Permian of the Wuda District, Inner Mongolia, China.

In the Late Paleozoic Noeggerathiales were a consistent but often rare component of the Euramerian and Cathaysian phytogeographic provinces. As the representative member of this group of plants in the Euramerian province, Noeggerathia has been recorded only twice from the Cathaysian province. Recent investigation of an autochthonous flora from the Early Permian Shanxi Formation yielded an abundant collection of a new species of Noeggerathia associated with fertile organs Noeggerathiaestrobus. Some specimens even show the connection between Noeggerathia and Noeggerathiaestrobus. Moreover, the sporangia and spores of the strobilus are well preserved. As a result, the morphology of this plant is known and a reconstruction of the whole plant is suggested. The new species is comparable to the Bohemian Noeggerathia intermedia. Both have long oval, lanceolate, or narrow rhomboidal pinnules, but the new species is distinguishable by significant differences: (1) The pinnules of the new species are much larger than those of N. intermedia. The pinnules of the latter, however, have much stronger teeth at the margins. Particularly, in the basal part of the frond, the pinnules of the new species are elliptical with very fine teeth, but that of the latter are wedge-shaped with deep teeth. (2) The fertile organ Noeggerathiaestrous of the new species is different from that of the Bohemian species in even more characters.

1 - University of Pennsylvania, Department of Earth and Environmental Sciences, Philadelphia, Pennsylvania, 19104, USA
2 - Chinese Academy of Sciences, Nanjing Institute of Geology and Palaeontology, Nanjing, 210008, P.R. CHINA

Keywords:
Noeggerathiales
Permian
Sporangia
Strobilus
China
Bohemia.

Presentation Type: Paper
Session: 5-8
Location: Maybird (Cliff Lodge)
Date: Monday, August 2nd, 2004
Time: 10:15 AM
Abstract ID:730