A spider working hard to make its cobweb. Spiders (order Araneae) are air-breathing arthropods that have eight legs. Anatomically, spiders differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax and abdomen, and joined by a small, cylindrical pedicel. Unlike insects, spiders do not have antennae. Spiders have the most centralized nervous systems of all arthropods, as all their ganglia are fused into one mass in the cephalothorax. Unlike most arthropods, spiders have no extensor muscles in their limbs and instead extend them by hydraulic pressure. True spiders have been found in Carboniferous rocks from 318 to 299 million years ago, and are very similar to the most primitive surviving order, the Mesothelae. The main groups of modern spiders, Mygalomorphae and Araneomorphae, first appear in the Triassic period, before 200 million years ago. Due to their very different structure and body segments they are able to make such a web very fast. This footage is part of the professionally-shot stock footage archive of Wilderness Films India Ltd., the largest collection of imagery from South Asia. The Wilderness Films India collection comprises of thousands of hours of high quality broadcast imagery, mostly shot on HDCAM 1080i High Definition, HDV and Digital Betacam. Write to us for licensing this footage on a broadcast format, for use in your production! We pride ourselves in bringing the best of India and South Asia to the world... wfi @ vsnl.com and admin@wildfilmsindia.com.
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