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Arachnids are arthropods in the class Arachnida (/ ə ˈ r æ k n ɪ d ə /) of the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. [2] Adult arachnids have eight legs attached to the cephalothorax.
2.3 Class Arachnida (Arachnids) ... 4.10 Class Malacostraca (Malcostracans, such as crabs and lobsters) 4.10.1 Subclass Eumalacostraca. 4.10.2 Subclass Hoplocarida.
Paintings of Araneus angulatus from Svenska Spindlar of 1757, the first major work on spider taxonomy. Spider taxonomy is the part of taxonomy that is concerned with the science of naming, defining and classifying all spiders, members of the Araneae order of the arthropod class Arachnida, which has more than 48,500 described species. [1]
Tetrapulmonata is a non-ranked supra-ordinal clade of arachnids.It is composed of the extant orders Uropygi (whip scorpions), Schizomida (short-tailed whip scorpions), Amblypygi (tail-less whip scorpions) and Araneae (spiders).
Mites are tiny members of the class Arachnida; most are in the size range 250 to 750 μm (0.01 to 0.03 in) but some are larger and some are no bigger than 100 μm (0.004 in) as adults. The body plan has two regions , a cephalothorax (with no separate head) or prosoma, and an opisthosoma or abdomen.
The Ixodidae are the family of hard ticks or scale ticks, [1] one of the three families of ticks, consisting of over 700 species.They are known as 'hard ticks' because they have a scutum or hard shield, which the other major family of ticks, the 'soft ticks' (), lack.
Ricinulei is a small order of arachnids.Like most arachnids, they are predatory; eating small arthropods.They occur today in west-central Africa and the Americas (Cryptocellus and Pseudocellus) from South America to as far north as Texas, where they either inhabit leaf-litter or caves.
10 genera, > 25 species ... Revision of the old world Holothyridae (Arachnida : Anactinotrichida : Holothyrina). ... This page was last edited on 12 August 2024, ...