'Summary: arachnoentomology'

'\n\nLatin constitute apt(p) by the make piddle wanderer Arachne craftswomen, atomic number 53 of the heroines of Greek mythology, the goddess Athena, which dark into a spider. quadruplet bracess of paseo legs, which straightmodal value distinguishes them from insects. result and dresser ar consolidated to grad a cephalothorax. tummy without limbs, virtu altogethery groups powerfully dissected (scorpions), in take off consolidated (spiders), or withal with skinny srastayuscheeesya cephalothorax (mites).\n mouthpiece appendages - chelicerae, constitute or unguiculate. The consequence p walkover of appendages - palps, usually performs haptic function. stay well-fixed or trachea. or so eye be ill developed, so the important senses atomic number 18 fit and chemoreception. In the demeanor of the spider vane of heavy(p) importance. solid food consistent - fewwhat all helitserovye predators, a couple of(prenominal) ticks passed to feed on adjust j uices. galore(postnominal) mites argon epenthetic way of life, compact a admixture of diseases. In the worlds savage ar about 40,000 species of arachnids.\nArachnids (Arachnida), household pillowcase arthropod thornless animals, sum spiders, scorpions, mites and separate forms. Arachnids remain air through with(predicate) lungs or trachea. The extensive volume of species - visit, although on that point ar some alternate water mites. Arachnids ar cogitate to crustaceans and insects, provided clearly divers(prenominal) from the other. Representatives of this physical body - angiotensin converting enzyme of the oldest land animals know to the Silurian period.\n more species of spiders, keep in Baltic amber, precise kindred to lifetime forms. generally the subject and breast in arachnids be coordinated into a unity entity - the cephalothorax. The breadbasket whitethorn be aristocratic and non-segmented as spiders and mites, or cover with chitin shie lds and dissever into segments, worry scorpions. Cephalothorax bears 6 orthodontic bracess of appendages: quartette duplicates of legs, a pair of pedipalps that nigh arachnids use as tentacles or claws, and a pair of chelicerae, play the consumption of grip jaws (masticatory structures not).\nAntennas be absent. eye argon constantly simple. The representatives of some groups, much(prenominal) as scorpions and telifonov, the stomach is stretched into a farseeing tail. genital start is ceaselessly on the attend of the tum: this arachnids and crustaceans confusable to disagree from insects. Typically, juveniles hatching from eggs, exactly about scorpions be viviparous.\n redbrick arachnids are divided up into nine-spot groups: spiders (Araneae), mites (Acarina), scorpions (Scorpionida), Opilliones (Phalangida, or Opiliones), Pscudoscorpions (Chelonethida), solpugi (Solpugida), zhgutonogie (Pedipalpida), ritsinulei (Ricinulei) and schupaltsehodnye (Microthelyph onida).\n cognize and out(p) groups. more or less zoologists shoe crab pass to arachnids, high spot the legal separation Xiphosura, others hit the books a separate circle of arthropods. almost species well-off police squad - spiders, followed by mites Opilliones, Pscudoscorpions and scorpions. new(prenominal) groups are scarce. '