post #1989482 post #1818702 post #10084

Arachnids, members of Arachnida, are a large class of arthropods, with most adults possessing multiple legs, multiple eyes, facial appendages such as chelicerae and pedipalps, and generally large and/or elongated abdomens. The most well known arachnids are spiders and scorpions.

Nearly all adult arachnids have 8 legs, differentiating them from general insects who typically have 6. Also, unlike insects, they lack antennae as well as wings. Their bodies are covered in a tough exoskeleton, some being covered in fur or hairs known as urticating hairs, used as a form of defensive irritant. Almost all arachnids are terrestrial, though a few live within freshwater and marine environments. Quite a few arachnids utilize various, similar defensive and hunting mechanisms, often related to piercing the skin of the predator or their prey with claws, pincers, stingers, or fangs. A lot of arachnids utilize this piercing alongside a form of venom. All arachnids produce silk, and about half of the arachnid species use the silk to weave webs to catch prey.

Families, genera, and species

• arthropod
• arachnid
• acarine
• mite
• acariform
• pyroglyphid
• dust_mite
• sarcoptiform
• itch_mite
• trombidiform
• chigger
• demodex
• mesostigmata
• varroid
• parasitiform
• mesostigmata
• tick_(arachnid)
• camel_spider
• harvestmen
• hooded_tickspider
• horseshoe_crab
• pseudoscorpion
• scorpion
• brontoscorpio
• buthid
• deathstalker_scorpion
• indian_red_scorpion
• hemiscorpiid
• flat_rock_scorpion
• iurid
• hairy_scorpion
• pulmonoscorpius
• scorpionid
• emperor_scorpion
• nebo_(scorpion)
• common_black_scorpion
• giant_forest_scorpion
• asian_forest_scorpion
• vaejovid
• vaejovis
• bryson's_striped_scorpion
• spider
• araneomorph
• diving_bell_spider
• huntsman_spider
• jumping_spider
• peacock_spider
• vampire_spider
• zebra_spider
• orb-weaver_spider
• golden_silk_orb-weaver
• spiny_orb-weaver
• crab-like_orb-weaver
• curved_spiny_spider
• recluse_spider
• brown_recluse
• spitting_spider
• theridiid
• hawaiian_happy-face_spider
• steatoda
• cupboard_spider
• widow_spider
• black_widow_spider
• european_black_widow
• katipo
• northern_widow_spider
• redback_spider
• brown_widow_spider
• red_widow_spider
• white_widow_spider
• thomisid
• flower_crab_spider
• goldenrod_crab_spider
• wandering_spider
• brazilian_wandering_spider
• wolf_spider
• jumping_spider
• mygalomorph
• atracid
• atypical_tarantula
• tarantula
• brachypelma
• cyriopagopus
• cobalt_blue_tarantula
• goliath_birdeater
• ornamental_spider
• gooty_sapphire
• pinktoe_tarantula
• trapdoor_spider
• vinegaroon
• whip_spider

Related

• ambient_spider
• arthropod_humanoid
• arachnid_humanoid
• scorpion_humanoid
• spider_humanoid
• tarantula_humanoid
• arthropod_taur
• arachnid_taur
• scorpion_taur
• spider_taur
• tarantula_taur
• drider
• frostbite_spider
• mythology
• arachne
• girtablilu
• werearachnid

General anatomy

• arthropod_abdomen
• arthropod_webbing
• chelicerae
• claws
• exoskeleton
• fangs
• multi_eye
• multi_limb
• multi_leg
• pedipalps
• pincers
• stinger

Other rankings

• tag group:species
• arthropod
• anomalocarid - Anomalocaris, etc.
• arachnid - Scorpion, spider, tick, etc.
• crustacean - Crab, lobster, shrimp, etc.
• insect
• myriapod - Centipede and millipede.