The arachnid orders are the orders of the class Arachnida, which holds over 60,000 described species. Spiders, the order Araneae, are the majority with over 50,000 described species, mites and ticks come next with around 48,200 species, and the smaller groups are scorpions with 1200 species, whip scorpions with 100, palpigrades with 60, pseudoscorpions with 2000, solpugids with 900 and harvestmen with 5000. Nearly all species are terrestrial. GBIF lists orders including Araneae, Trombidiformes, Sarcoptiformes, Mesostigmata, Opiliones, Pseudoscorpiones, Scorpiones, Solifugae, Ixodida, Schizomida, Amblypygi, Uropygi, Palpigradi and Ricinulei.
All Arachnid Orders
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Animal Diversity Web: Arachnida
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Spiders make up the majority of these (over 50,000 described species)
GBIF Secretariat: GBIF Backbone Taxonomy, children of Arachnida
GBIF SecretariatChildren of Arachnida
"canonicalName":"Araneae","vernacularName":"spider","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":75520
Children of Arachnida: Trombidiformes
"canonicalName":"Trombidiformes","vernacularName":"Mites","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":27690
Children of Arachnida: Sarcoptiformes
"canonicalName":"Sarcoptiformes","vernacularName":"Mite","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":22683
Children of Arachnida: Mesostigmata
"canonicalName":"Mesostigmata","vernacularName":"mites","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":12264
Children of Arachnida: Opiliones
"canonicalName":"Opiliones","vernacularName":"harvestman","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","publishedIn":"Sundevall, C.J. (1833) Conspectus Arachnidum. C.F. Berling, Londini Gothorum [= Lund (Sweden)], 1-39 pp.","numDescendants":10472
Children of Arachnida: Pseudoscorpiones
"canonicalName":"Pseudoscorpiones","vernacularName":"pseudoscorpion","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":6293
Children of Arachnida: Scorpiones
"canonicalName":"Scorpiones","vernacularName":"scorpion","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":5343
Children of Arachnida: Solifugae
"canonicalName":"Solifugae","vernacularName":"camel spider","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":1615
Children of Arachnida: Ixodida
"canonicalName":"Ixodida","vernacularName":"tick","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":1598
Children of Arachnida: Schizomida
"canonicalName":"Schizomida","vernacularName":"short-tailed whip-scorpion","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":718
Children of Arachnida: Amblypygi
"canonicalName":"Amblypygi","vernacularName":"whip spider","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":478
Children of Arachnida: Uropygi
"canonicalName":"Uropygi","vernacularName":"whip scorpion","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":234
Children of Arachnida: Palpigradi
"canonicalName":"Palpigradi","vernacularName":"microwhip scorpion","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":187
Children of Arachnida: Ricinulei
"canonicalName":"Ricinulei","vernacularName":"hooded tickspider","authorship":"","nameType":"SCIENTIFIC","rank":"ORDER","origin":"SOURCE","taxonomicStatus":"ACCEPTED","nomenclaturalStatus":[],"remarks":"","numDescendants":183
View the Source Wikipedia: Spider
WikipediaHas Member: Araneae, LeadQuote, Has Member: Araneae, Lead
Spiders (order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk.
Wikipedia: Scorpion
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Scorpions (order Scorpiones) are predatory arachnids with eight legs, a pair of grasping pincers (or chelae) and a narrow, segmented tail, often carried in a characteristic forward curve over the back and always ending with a stinger.
Wikipedia: Schizomida
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Schizomida, also known as sprickets or short-tailed whip-scorpions, is an order of arachnids, generally less than 5 millimetres (0.20 in) in length.
Wikipedia: Palpigradi
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Palpigradi is an order of very small arachnids commonly known as microwhip scorpion or palpigrades.
Wikipedia: Ricinulei
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Ricinulei is a small order of arachnids. Like most arachnids, they are predatory; eating small arthropods.
Wikipedia: Acariformes
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The Acariformes, also known as the Actinotrichida, are the more diverse of the two superorders of mites, alongside Parasitiformes.
Wikipedia: Parasitiformes
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Parasitiformes are a superorder of Arachnids, constituting one of the two major groups of mites, alongside Acariformes.
Wikipedia: Uropygi
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Uropygi is an arachnid order comprising invertebrates commonly known as whip scorpions or vinegaroons (also spelled vinegarroons and vinegarones).
Solifugae (Wikipedia)
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Solifugae is an order of arachnids known variously as solifuges, sun spiders, camel spiders, wind scorpions, and jerrymanders.
Wikipedia: Amblypygi
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Amblypygi is an order of arachnids also known as whipspiders or tailless whipscorpions.
Opiliones - Wikipedia
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The Opiliones (formerly Phalangida) are an order of arachnids, colloquially known as harvestmen, harvesters, daddy long legs, or granddaddy long legs.
Wikipedia: Pseudoscorpion
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Pseudoscorpions, also known as false scorpions or book scorpions, are small, scorpion-like arachnids belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethida.
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