Answer:
Phylum Arthropod is the largest phylum which contain about 5-8 million animal species which are occupying 80% of the total living animal species.
The main 5 sub phylum of arthropods are Trilobites,Chelicerates,Myriapods, Crustaceans,Hexapods.
Step-by-step explanation:
Chelicerates-
This group of arthropod includes spider,mites,horse shoe crab,tick etc
The main characteristics of this group are presence of 6 pairs of appendages where 4 pairs are used for walking and two pairs are used as mouth parts.They lack mandible and antennae.
Myriapods-
Centipedes and millipedes are including this group which are quite similar with the worm like creature.
They have round body with 2 pairs of legs on both the body segments and make burrow in the soil. They contain more than 20 legs, 1 pair of antennae,presence of tough exoskeleton which protects them from environmental hazards.
Hexapods-
The name is given as they contain 3 pairs of legs and body is divided into head, thorax and abdomen.They bear 1 pair of antennae and mandible as a mouth organ.The abdomen is 11 segmented and bear have reproductive organs.They may be with wing or without wings.
Crustaceans-
This group includes crabs,lobsters, crayfish etc are mainly free living or terrestrial,parasitic or sessile forms which contain 3 regions the head, thorax and abdomen which is covered by carapace and is protected by exoskeleton.