What Are Jointed Legged Animals? Insects, spiders, crabs, and scorpions belong to the phylum Arthropoda. Arthropods are invertebrate animals without a backbone. They have segmented bodies and an exoskeleton, a skeleton outside of their bodies. The name comes from another feature they share— jointed appendages such as wings, legs, and mouthparts. What animals have jointed
What Invertebrate Groups Come Under Arthropods? insects. arachnids. crustaceans. myriapods. What classes are under arthropods? The phylum Arthropoda is commonly divided into four subphyla of extant forms: Chelicerata (arachnids), Crustacea (crustaceans), Hexapoda (insects and springtails), and Myriapoda (millipedes and centipedes). What invertebrates are arthropods? insects; myriapods (including centipedes and millipedes); arachnids (including spiders, mites and