article: Arthropod
links: Merostomata Millipede Trilobite Symphyla Arachnida Spider Class (biology) Cephalocarida Hexapoda Tactopoda Biological classification Animal Butterfly Entognatha Ostracoda Chilopoda Sow bug Pauropoda Diplopoda Crustacea Permian–Triassic extinction event Hexapod Maxillopoda Trilobita Branchiopoda Insect Extinction Centipede Trilobitomorpha Malacostraca Insecta Remipedia Greek language Pycnogonida Chelicerata Myriapoda