Difference between revisions of "Category:Arachnida"

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Classification

Arthropod Classification - copyright nabrown RVC

Deer tick - Wikimedia Commons

The arachnids includes well known veterinary species such as ticks and mites (order Acarina). It also includes scorpions and spiders. Most of the structure and function of the arachnids is similar to the insecta.

Structure and Function

• Only two body divisions
  • Cephalo-thorax
  • Abdomen

• Three pairs of legs in the larval stages or four pairs of legs during the nymphal and adult stages

• No wings

• No antennae

• No compound eyes

• Small size
  • E.g. Ticks are under 1cm in length
  • E.g. Mites are under 1mm in length

Life cycles

• The larva (also called seed tick) develops from the egg

• The nymphal stage follows the larval stage

• The nymph then develops into an adult (i.e. sexually mature)

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