Arthropoda

phylum of invertebrates with jointed exoskeletons Arthropods (Arthropoda) is a phylum containing organisms that share fundamental body plan characteristics. It contains 12 classs with 7,259 known species. Key class groups include Arachnids, Branchiopoda, centipede, springtail, copepod, and Diplopoda. Among its members, 776 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Animals (Animalia).