Arborescent gymnosperms from the Viséan of East Kirkton, West Lothian, Scotland
| Autor: | Jean Galtier, Andrew C. Scott |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1994 |
| Předmět: |
Paleozoic
Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Biostratigraphy Lower Carboniferous xylem Brigantian phloem Paleontology gymnosperm Gymnosperm Research Groups and Centres\Earth Sciences\Geochemistry Genus Viséan Carboniferous Faculty of Science\Earth Sciences East Kirkton stems leaf traces General Environmental Science biology Xylem trees Arborescent Plants biology.organism_classification Research Groups and Centres\Earth Sciences\Plant Paleobiology Scotland General Earth and Planetary Sciences wood |
| Zdroj: | Transactions of the Royal Society of Edinburgh : Earth Sciences, 84 (3-4) |
| Popis: | Plants of gymnospermous affinities are the most important component of the flora at East Kirkton. Four genera of anatomically preserved gymnosperm stems with well developed secondary xylem are interpreted as arborescent. The largest specimens (trunks up to 50 cm in diameter) are attributed to the genus Pitus. Features of the wood, including ray size, are characteristic of the species Pitus withamii Lindley & Hutton which has long been described from the Strathclyde (former Oil-Shale) Group of Scotland. Decorticated axes of Eristophyton fasciculare are more common; their study has enlarged our concept of the species with regard to maximum diameter, internode length and phloem organisation. Similarly, the decorticated specimens of Bilignea solida Kidston found at East Kirkton exceed in diameter the original material described from Ayrshire. The fourth taxon is Stanwoodia recently described by Galtier and Scott (1991). In all these plants, features of leaf traces suggest that leaves were relatively large and densely borne on ultimate branches. These leaves were shed ultimately, prior to a later phase of wood development; they certainly correspond to (? most of) the compression foliage commonly found in association: Sphenopteridium, Adiantites and Spathulopteris. |
| Databáze: | OpenAIRE |
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