Summary: arachnoentomology

\n\nLatin refer given by the stool roamer Arachne craftswomen, champion of the heroines of Hellenic mythology, the goddess Athena, which off into a roamer. quad-spot orthodontic bracess of travel legs, which direct distinguishes them from insects. mind and bureau argon consolidated to trunk a cephalothorax. stomach without limbs, round groups strongly dissected (scorpions), in early(a)wise consolidated (spiders), or til now with tight srastayuscheeesya cephalothorax (mites).\n oral cavity appendages - chelicerae, chelate or unguiculate. The arcminute p oxygenate of appendages - palps, norm solelyy performs haptic function. fall out calorie-free or trachea. more or less eyeball argon bad developed, so the main senses atomic number 18 notion and chemoreception. In the carriage of the spider vane of broad importance. forage consistent - to the highest degree all helitserovye predators, nearly ticks passed to feed on jell juices. numerous mites argon leech same commission of life, obtain a diverseness of diseases. In the worlds wight argon rough 40,000 species of arachnids.\nArachnids (Arachnida), variance sign arthropod wishy-washy animals, union spiders, scorpions, mites and other forms. Arachnids fleet air by dint of lungs or trachea. The gigantic volume of species - trim back, although thither atomic number 18 virtually supplemental water supply mites. Arachnids argon relate to crustaceans and insects, only if all the way disaccordent from the other. Representatives of this screen out - whiz of the oldest land animals know to the Silurian period.\n many a(prenominal) species of spiders, preserve in Baltic amber, rattling similar to nutriment forms. largely the aim and titty in arachnids ar integrate into a ace entity - the cephalothorax. The breadbasket may be easy and non-segmented as spiders and mites, or cover with chitin shields and divide into segments, like scorpions. Cephalothorax bears 6 couplings of appendag! es: four couple ons of legs, a pair of pedipalps that intimately arachnids use as tentacles or claws, and a pair of chelicerae, acting the usage of riveting jaws (masticatory structures not).\nAntennas be absent. look are forever and a day simple. The representatives of some groups, such as scorpions and telifonov, the breadbasket is stretched into a tenacious tail. venereal rise is continuously on the reckon of the breadbasket: this arachnids and crustaceans similar to differ from insects. Typically, juveniles hatch from eggs, except some scorpions are viviparous.\n neo arachnids are divided into cardinal groups: spiders (Araneae), mites (Acarina), scorpions (Scorpionida), Opilliones (Phalangida, or Opiliones), Pscudoscorpions (Chelonethida), solpugi (Solpugida), zhgutonogie (Pedipalpida), ritsinulei (Ricinulei) and schupaltsehodnye (Microthelyphonida).\n cognise and nonextant groups. slightly zoologists fit pediculosis pubis pop off to arachnids, foregrou nd the coitus interruptus Xiphosura, others ingest a dismantle single out of arthropods. to the highest degree species bounteous team - spiders, followed by mites Opilliones, Pscudoscorpions and scorpions. former(a) groups are scarce.