Phylum arthropoda (the arthropods) contain organisms with segmented  bodies, an exoskeleton made from chitin, and joint appendages. Examples are hexapods including insects; … the millipedes,  crustaceans like lobsters, crabs and shrimp; the arachnids  including spiders, and many others.hylum arthropoda (the arthropods) contain organisms with segmented  bodies, an exoskeleton made from chitin, and joint appendages.