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On the Palaeozoic pteridophylls
Content Provider | Birbal Sahni Institute of Paleobotany |
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Author | Zimmermann, Walter |
Abstract | The Palaeozoic pteridophylls hold an excellent intermediate osition in their entity as well as in their individual characteristics between the oldest (silurian and early devonian) plants and the land plants of today. This is also illustrated by the genera as they were named by Brogniart as ollows: Archaeopteris,Sphenopteris, Pecopteris, Neuropteris, Linopteris, Alethopteris,Callipteris. These genera demonstrate how the phylogenetic development was carried out by few elementary processes, still isolated and restrained to primitive stages. The same elementary processes also formed the structure of palaeozoic stems in their primitive stages. The mesozoic pteridophylls are a further step of phylogenetic changes towards present day leafforms. |
Starting Page | 79 |
Ending Page | 84 |
File Format | |
Volume Number | 14 |
Language | English |
Publisher Date | 1962-01-01 |
Access Restriction | Open |
Content Type | Text |
Educational Use | Research Reading |
Resource Type | Article |
Education Level | Under Graduate Post Graduate |
Subject | Paleobotany; fossil microorganisms |