What are four major groups of arthropods?

Answer 1

Under the arthropoda phylum are subphyla Chelicerata, Myriapoda, Crustacea, and Hexapoda. There is also an extinct class Marrellomorpha and an the extinct Trilobite subphylum. The chelicerata include Spiders, scorpions, mites, etc. Myriapods include centipedes and millipedes. Crustaceans include lobsters, krill, crabs, shrimp, woodlice, etc. Hexapoda include the class Insecta, the insects.

Answer 2

There are four groups of arthropods: arachnids, centipedes, crustaceans, and insects. Arachnids are what we call spiders. Centipedes look like worms only they have lots and lots of legs. Crustaceans have the hard outer shells and are generally good to eat. Lobsters and crabs are crustaceans. Insects are what most kids call "bugs". Bees, wasps, and beetles are all insects.