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Pillai, S. S. K.
- IGMIS - a Computer-Aided Information System on Indian Gondwana Megaspores
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PDF Views:84
Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
Source
Current Science, Vol 106, No 3 (2014), Pagination: 434-439Abstract
The Indian Gondwana Megaspore Information System (IGMIS) is an information system developed for storage and retrieval of Indian Gondwana megaspore (female reproductive unit of early land plants) records in a selective manner. At present, it provides information on 45 genera and 159 species recorded from Palaeozoic and Mesozoic sediments of India. The use of the database is to store and organize information on Indian Gondwana megaspores accrued over the past 70 years. This information system is a significant step towards ensuring safety and accessibility of the data on the dispersed Indian fossil megaspores, besides providing accessibility for handling the information in future, including new and emerging types of data format. Each record has a unique code number for further reference. Addition, deletion, modification and search facility are provided by this software. Additionally, search can be performed in terms of different morphotaxonomical characteristics (single or combination of characters). The program is useful for a quick and classified megaspore search on datagrid, especially of the published information on fossil megaspores and their horizontal and vertical distribution in India. The program and associated database are capable of computer-aided identification of Indian Gondwana megaspores and help avoid assigning multiple/different genera or species to the same category. Here we report our attempt to digitize and provide an updated knowledge on various aspects of Indian Gondwana megaspores, including their morphotaxonomical characters, distribution and photodocumentation in an information system.Keywords
Computer-Aided Information System, Distribution, Megaspores, Morphotaxonomical Characters, Photo-Documentation.- Late Permian and Triassic Palynomorphs from the Allan Hills, Central Transantarctic Mountains, South Victoria Land, Antarctica
Abstract Views :244 |
PDF Views:104
Authors
Ram Awatar
1,
Rajni Tewari
1,
Deepa Agnihotri
1,
Sankar Chatterjee
2,
S. S. K. Pillai
1,
K. L. Meena
1
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 Texas Tech University, Lubbock, Texas 79401, US
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 Texas Tech University, Lubbock, Texas 79401, US
Source
Current Science, Vol 106, No 7 (2014), Pagination: 988-996Abstract
Palynology is an established tool for age determination and correlation of sedimentary sequences. The palynomorphs retrieved from the Weller and Lashly formations of Allan Hills, central Transantarctic Mountains, South Victoria Land, Antarctica have been studied for precise age determination. Forty-five different groups of palynomorphs have been recovered from the Weller and Lashly formations. The palynoflora of Weller Formation shows dominance of striate bisaccate pollen taxa, mainly Striatopodocarpites, Faunipollenites (Protohaploxypinus), Crescentipollenites, Striatites and Verticipollenites in association with Horriditriletes, Cuneatisporites, Alisporites, Plicatipollenites, Gnetaecaepollenites, Sahnites, Tiwariasporis, Rhizomaspora, Pretricolpipollenites, Chordasporites and sporadic occurrence of Lundbladispora, Klausipollenites and Densoisporites. In the present study, a Late Permian age based on palynological evidences has been suggested for the Weller Formation, which was earlier assigned an Early Permian age. The Late Permian age of the Weller Formation is corroborated by similarity of its palynoassemblage with that of the Upper Stage-5 (Late Permian) of Australia. Additionally, the palynoflora of Weller Formation is comparable with the Late Permian palynoassemblages of India and South Africa. The younger palynoassemblage of the Lashly Formation contains Klausipollenites, Falcisporites and Alisporites in prominence and shows rare occurrence of Minutosaccus, Goubinispora, Lundbladispora, Densoisporites, Aulisporites and Chordasporites, indicating Early to Middle Triassic age and showing affiliation with Aratrisporites parvispinosus zone of Australia, Alisporites zone (A&B) of Feather Conglomerate and Fremouw Formation of Antarctica.Keywords
Allan Hills, Antarctica, Late Permian, Palynology, Triassic.- Occurrence of Vertebraria indica (Unger) Feistmantel, 1877 - An Evidence for Coal-Forming Vegetation in Kothagudem Area, Godavari Graben, Telangana
Abstract Views :273 |
PDF Views:122
Authors
Affiliations
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 D.A.V. (P.G.) College, Dehradun 248 001, IN
1 Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007, IN
2 D.A.V. (P.G.) College, Dehradun 248 001, IN