The largest phylum accounts for around 80% of the total species and its largest class is Insecta.
About two-third of all the named species are Arthropods
The phylum Arthropoda is characterized by
The segmented part of body is the head, thorax and abdomen. In some arthropods, the head and thorax are fused to form a cephalothorax.
These animals have jointed appendages i.e. legs.
It has an open circulatory system and a Malpighian tube for excretion.
Examples: insects, crabs etc.
Final Answer:
In the animal kingdom, the largest phylum is Arthropoda.