The largest phylum in the animal kingdom is kingdom Arthropoda. They make up more than 80 per cent of all animal species documented till date. The kingdom contains between 5 and 10 million species, distributed across the globe. The largest phylum in the animal kingdom includes such familiar forms as lobsters, crabs, spiders, mites, insects, centipedes, and millipedes. They adapted to solve the problems of support, stability, desiccation, and respiration.
The extant members of this kingdom are typically small, but extinct arthropods such as the Eurypterids grew to enormous sizes. The arthropods were one of the earliest groups of animals to evolve, and they survived all the major mass extinctions, which wiped out most other life forms.
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