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Hazra, Manoshi
- First Fossil Dragonfly from India
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PDF Views:73
Authors
Affiliations
1 Palaeobotany–Palynology Laboratory, Department of Botany, Sidho-Kanho-Birsha University, Ranchi Road, Purulia 723 104, IN
2 Entomology Laboratory, Department of Zoology, University of Kalyani, Kalyani, Nadia 741 235, IN
3 Centre of Advanced Study, Department of Botany, University of Calcutta, 35, B.C. Road, Kolkata 700 019, IN
1 Palaeobotany–Palynology Laboratory, Department of Botany, Sidho-Kanho-Birsha University, Ranchi Road, Purulia 723 104, IN
2 Entomology Laboratory, Department of Zoology, University of Kalyani, Kalyani, Nadia 741 235, IN
3 Centre of Advanced Study, Department of Botany, University of Calcutta, 35, B.C. Road, Kolkata 700 019, IN
Source
Current Science, Vol 119, No 7 (2020), Pagination: 1204-1207Abstract
In the Indian wetland palaeoecosystem, no dragonfly has been reported from the Cenozoic sediments until now. Here, we report a well-preserved fossil dragonfly (Odonata: Anisoptera) recovered from the late Neogene sediments of the Chotanagpur plateau, Jharkhand, eastern India. It is characterized by well-preserved head, thorax and a long cylindrical abdomen with terminalia and four wings with longitudinal veins, cross-veins and characteristic small pterostigma at the apex. These significant morphological attributes reveal a close resemblance of the fossil specimen with modern dragonflies of the family Libellulidae (order: Odonata, sub-order: Anisoptera). To the best of our knowledge, there is no reliable occurrence of dragonfly in the Indian fossil record. The core distribution of the dragonfly, suggests that it thrived under a tropical, warm, humid climate during the depositional period. The fossil specimen was found associated with prolific and diversified tropical angiospermic plant remains, vertebrates and invertebrates that provided a suitable palaeoniche for the dragonfly to survive. In addition, the fossil material and associated angiospermic flora indicate the terrestrial as well as freshwater lacustrine environment in Chotanagpur plateau during the depositional period.Keywords
Chotanagpur Plateau, Fossil Dragonfly, Neogene Deposits, Palaeoenvironment, Tropical Climate.Full Text
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- Occurrence of a Cyprinid Fish (Leuciscinae) from Latest Neogene (?Pliocene) Sediments of Chotanagpur Plateau, Eastern India
Abstract Views :221 |
PDF Views:80
Authors
Affiliations
1 Department of Botany, Sidho-Kanho-Birsha University, Ranchi Road, Purulia 723 104, IN
2 Centre of Advanced Study, Department of Botany, University of Calcutta, 35, B.C. Road, Kolkata 700 019, IN
1 Department of Botany, Sidho-Kanho-Birsha University, Ranchi Road, Purulia 723 104, IN
2 Centre of Advanced Study, Department of Botany, University of Calcutta, 35, B.C. Road, Kolkata 700 019, IN
Source
Current Science, Vol 119, No 8 (2020), Pagination: 1367-1370Abstract
A compressed fossil fish bearing close resemblance to sub-family Leuciscinae (family: Cyprinidae) is reported from latest Neogene (?Pliocene) sediments of Chotanagpur plateau, eastern India. The recovered fossil fish contains exceptionally well-preserved skeleton. It is characterized by compressed belly, medium-sized head, well-preserved skull, ten caudal vertebrae, moderately long vertebral spines, cycloid scales, and wellpreserved dorsal, pectoral, pelvic, anal and caudal fins. The fossil material and associated angiospermic flora indicate the existence of Leuciscinae and freshwater lacustrine environment (with intermittent fluvial incursions during flood events) in the Chotanagpur plateau during the depositional period.Keywords
Angiospermic Flora, Fossil Fish, Freshwater, Lacustrine Environment.Full Text