| Abstract Detail
Paleobotanical Section Serbet, Rudolph [1], Taylor, Thomas N. [2], Taylor, Edith L. [2]. Additional Observations on Buriadia from the Permian of Antarctica. An extensive collection of impression/compression remains including leafy shoots and ovules similar to specimens described as Buriadia is reported from the Permian Mt. Gran site in Victoria Land, Antarctica. The specimens, preserved as a thin layer of pyrite in a fined grained sediment, show a number of morphological features like those reported from the type material. Isolated ovules, up to 3.0 mm wide and 4.0 mm long, are roughly tear-drop shape and possess a conspicuous, two-horned apex. Reflected light microscopy suggests that the seeds have a relatively thick seed coat, and in several specimens, a prominent basal disk in the chalaza. Leafy shoots are up to 7 cm long and characterized by helically arranged, polymorphic leaves. Leaves are typically 1 cm long and exhibit simple to multifid morphologies. Several shoot systems include ovules along the axis suggesting possible attachment, perhaps associated with subtending seed scale complex. The occurrence of Buriadia in the Permian of Antarctica not only extends the geographic range of this enigmatic taxon, but also provides additional information about the floral composition of this Glossopteris-dominated ecosystem.
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1 - University of Kansas, Division of Paleobotany, Natural History Museum and Biodiversity Research Center, 1200 Sunnyside Avenue, Lawrence, Kansas, 66045, USA
2 - University of Kansas, Department of Ecology & Evolutionary Biology, Natural History Museum and Biodiversity Research Center, 1200 Sunnyside Avenue, Lawrence, Kansas, 66045-7534, USA
Keywords:
Buriadia
Antarctica
Permian
morphology.
Presentation Type: Oral Paper:Papers for BSA Sections
Session: 28
Location: Superior A/Cliff Lodge - Level C
Date: Monday, July 27th, 2009
Time: 3:30 PM
Number: 28003
Abstract ID:737 |
