BIOL 2030 Lecture Notes - Lecture 11: Sensillum, Waggle Dance, Corpus Allatum
Document Summary
Abdomen the posterior part of the body, behind the head and thoracic regions. Arachnida class of mainly terrestrial, carniverious arthropods, included in the subphylum. Chelicerata, comprising spiders (order araneae), scorpions (scorpiones), mites and ticks (acari), false scorpions (pseudoscorpiones), palpigrades, solifugids, and harvestmen. They have a body usually divided itno a prosoma of eight fused segments and a posterior opisthoma of 13 fused segments. The prosoma is not differentiated into a head and thorax and bears the clawed and prehensile chelicerae, the pedipalps, and four pairs of walking legs. Arthropods very large phylum of segmented invertebrate animals with heads, jointed appendages (fellers, mouthparts, and legs), and a thickened chitonous cuticle forming an exoskeleton. The phylum is generally divided into several different groups, most commonly the chelicerata, atelocerata, crustacea, and the extinct trilobita. In this classification, the chelicerata inclues the spiders, ticks, mites, scorpions, pycnogonids, horseshoe crabs, and the extinct eurypterids, the.
