Arachnida

Translingual

(order Opiliones)

Etymology

From .

Proper noun

Arachnida

1. A taxonomic class within the subphylum Chelicerata – the spiders, scorpions, harvestmen, mites and ticks, having four pairs of thoracic appendages.

Usage notes

Consensus is lacking for taxonomic classification between the class and order levels. The subclass Acari is sometimes used, but doing so leads to an incompletely specified level.

Hypernyms

• (class): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Protostomia – infrakingdom; Ecdysozoa – superphylum; Arthropoda – phylum; Chelicerata - subphylum

Hyponyms

• (class): Acari (subclass, no consensus on use)
  • Holothyrida, Ixodida, Mesostigmata, Opilioacarida, Sarcoptiformes, Trombidiformes (orders, within Acari when used)
  • Amblypygi, Araneae, Opiliones, Palpigradi, Pseudoscorpionida, Ricinulei, Schizomida, Scorpiones, Solifugae, Thelyphonida, Uropygi (= Thelyphonida) (orders)
  • †Haptopoda, †Phalangiotarbida, †Trigonotarbida, †Uraraneida (extinct orders)

References

• Arachnida on Wikipedia.Wikipedia
• Arachnida on Wikispecies.Wikispecies
• Category:Arachnida on Wikimedia Commons.Wikimedia Commons
• Arachnida at the Tree of Life Web Project
• Ruggiero MA, Gordon DP, Orrell TM, Bailly N, Bourgoin T, Brusca RC, et al. (2015) A Higher Level Classification of All Living Organisms. PLoS ONE 10(4): e0119248. PMID 25923521, →DOI