L''''aracnida''' è na classi di d'[[nvertebratearmali]] [[animalnvirtibratu|nvirtibrati]]s ntô in the subphylum suttafilu[[Chelicerata]]. ArachnidsL'aracinida arevennu namedchiamati forpû thepirsunaggiu [[GreekMituluggia grecu mythology|mythologicalmitulòggicu]] figure [[Arachne]].
TheyCci arecampanu chieflysupratuttu terrestrialsuprâ (o ntrâ) terra e [[arthropod]]s,'attrovanu sometra 65,.000 to- 73,.000 speciesspeci includingincludennu theli [[spidertaràntula|taràntuli]]s, [[scorpionscurpiuni]]s, [[opiliones|harvestmen]],e [[tick]]s,autri andarmali [[mite]]ssimili. TheSi arachnidspò aredistinguiri easilyfacili distinguishedtra froml'aracnida thee li [[insectnsetti]]sbypû thefattu factca thatnn'hannu theyottu havejammi eightmmeci legsdi insteadsei. of six. The [[pedipalpi]] (leg-like mouthparts) of some species has instead been adapted for sensory, prey capture or reproductive functions. In [[solpugid]]s the palpi are quite leg-like and make solpugids appear to have ten legs. Larval mites have only six legs: they grow their fourth pair when they molt into [[nymph]]s.
Arachnids are mostly [[carnivore|carnivorous]], feeding on the pre-digested body of [[insect]]s and other small animals. Many are [[venom]]ous - they secrete [[poison]] from specialized glands to kill prey or enemies.
