protodonata meaning in Hindi

Examples

1. Although sometimes included under the dragonflies, the Protodonata lack certain distinctive wing features that characterise the Odonata.
2. In some treatments, the Odonata are understood in an expanded sense, essentially synonymous with the superorder Odonatoptera but not including the prehistoric Protodonata.
3. Fossils of very large dragonfly ancestors in the Protodonata are found from 325 million years ago ( Mya ) in Upper Carboniferous rocks; these had wingspans up to about.
4. In some treatments, the Odonata are expanded to include all these taxa with the exception of the " Erasipteridae ", Geroptera and Protodonata; this group is treated as an unranked clade "'Odonatoclada "'in the scheme used here.
5. Representatives of the extinct dragonfly-like order Protodonata such as the Carboniferous " Meganeura monyi " of what is now France and the Permian " Meganeuropsis permiana " of what is now North America are the largest insect species yet known to have existed.
6. The oldest fossils are of the Protodonata from the 325 Mya Upper Carboniferous of Europe, a group that included the largest insect that ever lived, " Meganeuropsis permiana " from the early Permian, with a wingspan around; their fossil record ends with the Permian Triassic extinction event ( about 247 Mya ).