What are the 5 different classes of animals from the phylum arthropoda?

Answer 1

The term 'class' has a specific connotation within taxonomy and strictly speaking there are much more than just five classes. Under arthropoda are Subphyla Chelicerata, Myriapoda, Crustacea, and Hexapoda. (There is also an extinct class Marrellomorpha and an the extinct Trilobite subphylum). The chelicerata, like Spiders, scorpions, mites, etc., get their name from having appendages appear before the mouth; myriapods like centipedes and millipedes characterized by a high count of body segments and legs; crustaceans like crabs, shrimp, woodlice characterized by their biramous (two-part) limbs and a specialized larval form; hexapoda named for their consolidated thorax with only three pairs of legs.

Five classes below the phylum could be selected from these subphyla; for example classes Arachnida, Chilopoda, Branchiopod, Insecta, and Malacostraca - but there are many more.