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Permotheca with in situ pollen grains from the Lower Permian of the Urals
| Content Provider | Birbal Sahni Institute of Paleobotany |
|---|---|
| Author | Krassilov, Valentin A. Afonin, Sergey A. Naugolnykh, Sergey V. |
| Abstract | Sporangial heads or the pollen organ Permotheca from the Lower Permian or Tschekarda, the Urals, are described as semisynangiate, with sporangia proximally connate for about one-third to half their length. The sporangial walls are three-layered and vascularized. The pollen grains, studied with LM, SEM and TEM, are transitional protomonosaccale-bilobed to protobisaccate, sulcate, with alveolar infrastructure lamellate nexine and a tryphine-like surface layer. Chilrid zoosporangia occur in the pollen grains. Thesimilarity to Idanothekion in the sporangial and pollen morphology may indicate phylogenetic relationships. |
| Starting Page | 19 |
| Ending Page | 25 |
| File Format | |
| Volume Number | 49 |
| Language | English |
| Publisher Date | 1999-01-01 |
| Access Restriction | Open |
| Subject Keyword | Pteridosperms Sporangia Pollen morphology Phylogeny Permian |
| Content Type | Text |
| Educational Use | Research Reading |
| Resource Type | Article |
| Education Level | Under Graduate Post Graduate |
| Subject | Paleobotany; fossil microorganisms |
