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Mites, like this Clover Mite (Bryobia praetiosa), are arachnids but not spiders.
Chapter Outline
- Description of Arthropoda
- Classification of Arthropoda
- Chelicerata
- Mandibulata
- Pancrustacea
- Hexapoda
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The subphylum Chelicerata contains 3 Classes: Arachnida, Pycnogonida and Merostomata.
The class of spiders, scorpions and ticks. As of 2024, 2,105 species of Arachnida have been observed in iNaturalist in the US and 11,498 throughout the world.
- SUBCLASS ACARI
- SUPERORDER ACARIFORMES
- ORDER SARCOPTIFORMES
- Itch Mite (Sarcoptes scabei) - causes scabes - CDC
- American Dust Mite (Dermatophagoides farinae)
- Beetle mites
- ORDER TROMBIDIFORMES
- Sidewalk Mite - Douglas County, KS
- SUPERORDER OPILIOACARIFORMES
- SUPERORDER PARASITIFORMES
- ORDER HOLOTHYRIDA
- ORDER IXODIDA
- Lone Star Tick (Amblyomma americanum) - NOAH
- Black-Legged Tick (Ixodes scapularis) - ticks that spread Lyme disease - CDC
- ORDER MESOSTIGMATA
- ORDER AMBLYPYGI
- Tailless Whip Scorpions (Heterophrynus spp.)
- ORDER ARANEAE
- SUBORDER ARANEOMORPHAE
- Rabid Wolf Spider (Rabidosa rabida) - Prairie Garden Trust
- Orb Weaver (Neoscona) - Perry Lake, KS
- Golden Silk Spider (Nephila clavipes) - 6 (St. Louis Zoo)
- Bold Jumping Spider (Phidippus audax) - Perry Lake, KS
- Brown Recluse Spider (Loxosceles reclusa) -
- Black Widows (Latrodectus) -
- SUBORDER MYGALOMORPHAE
- Texas Black Spot Tarantula (Aphonopelma armada) - Palo Duro Canyon
- Red-Knee Tarantula (Brachypelma smithi) - 6 (Omaha and St. Louis Zoos)
- Salmon Pink Birdeater (Lasiodora parahybana) - 6 (Omaha and Sedgwick County Zoos)
- Gooty Sapphire Ornamental Tarantula (Poecilotheria metallica) - 6 (SCZ)
- ORDER OPILIONES
- ORDER PALPIGRADI
- ORDER PSEUDOSCORPIONES
- ORDER RICINULEI
- Hooded Tick Spider (Cryptocellus goodnighti)
- ORDER SCHIZOMIDA
- ORDER SCORPIONES
- Striped Bark Scorpion (Centruroides vittatus) - Clinton Lake, KS - NOAH
- Borneo Forest Scorpion (Heterometrus longimanus) - 6 (SCZ)
- Mozambique Rock Scorpion (Hadogenes granulates) - 6 (St. Louis Zoo)
- ORDER SOLIFUGAE
- Sun Spider - NOAH
- Sun Spider (Gluvia dorsalis)
- ORDER UROPYGI
- Vinegaroon/Whip Scorpion (Mastigoproctus giganteus) - 6 (Omaha Zoo)
The class of sea spiders. As of 2024, 14 species of Pycnogonida have been observed in iNaturalist in the US and 49 throughout the world.
- Stearns' Sea Spider (Pycnogonum stearnsi) - most iNat observations in the US for Pycnogonida - 7 (Monterey Bay)
The class of horseshoe crabs. As of 2024, only 1 species of Merostomata has been observed in iNaturalist in the US and 4 throughout the world.
- ORDER XIPHOSURA
- Horseshoe Crabs (Limulus polyphemus) - 10 (Delaware Bay)
- ORDER EURYPTERIDA [extinct] - WIK
- Sea Scorpion (Eurypterus spp.) -
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