CLASSIFICATION OF PHYLUM ARTHROPODA UPTO CLASSES & POSITION OF INSECTS IN ANIMAL KINGDOM AND ITS RELATIONSHIP WITH OTHER ARTHROPODA
Insects are invertebrates grouped in the phylum Arthropoda (Subphylum : Uniramia)
Characters of the Phylum Arthropoda: (Arthro-joint, poda-foot)
Segmented body
Segments grouped into 2 or 3 regions known as Tagmosis
Renewable chitinous exoskeleton
Grow by moulting
Bilateral symmetry
Body cavity filled with blood-Haemocoel
Tubular alimentary canal with mouth and anus
Dorsal heart with ostia
Dorsal brain with ventral nerve cord
Striated muscles
No cilia
Paired segmented appendages
Classification: 7 classes. Phylum : Arthropoda Classes :
Onychophora (claw bearing)e.g. Peripatus
Crustacea (Crusta - shell)e.g. Prawn, crab, wood louse
Arachnida (Arachne - spider)e.g. Scorpion, spider, tick, mite
Chilopoda (Chilo - lip; poda - appendage)e.g. Centipedes
Diplopoda (Diplo - two; poda- - appendage)e.g. Millipede
Trilobita (an extinct group)
Hexapoda or Insectae.g. Insects.
POSITION OF INSECTS IN ANIMAL KINGDOM
Table 1. Relationship of Insects with other Arthropods
