Integuments of arthropoda are covered with

Arthropoda:

• This is the largest phylum of Animalia which includes insects. Over two-thirds of all named species on earth are arthropods
• They have an organ-system level of organisation. They are bilaterally symmetrical, triploblastic, segmented and coelomate animals
• The body of arthropods is covered by a chitinous exoskeleton.

Other characters of Phylum Arthropoda are:

• The body consists of the head, thorax and abdomen.
• They have jointed appendages (arthros-joint, poda-appendages).
• Respiratory organs are gills, book gills, book lungs or tracheal system.
• The circulatory system is of open type. Sensory organs like antennae, eyes (compound and simple), statocysts or balancing organs are present.
• Excretion takes place through malpighian tubules. They are mostly dioecious. Fertilisation is usually internal.
• They are mostly oviparous. Development may be direct or indirect.
• Economically important insects – Apis (Honey bee), Bombyx (Silkworm), Laccifer (Lac insect)
• Vectors – Anopheles, Culex and Aedes (Mosquitoes)
• Gregarious pest – Locusta (Locust)
• Living fossil – Limulus (King crab).