Arachnida

== Translingual == === Etymology === From Ancient Greek ἀράχνη (arákhnē). === Proper noun === Arachnida A taxonomic class within the phylum Arthropoda – 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) ==== Descendants ==== ⇒ English: arachnoid → French: arachnide→ English: arachnid === 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