Arthropoda, phylum Arthropoda

jointed-foot invertebrates: arachnids; crustaceans; insects; millipedes; centipedes

• phylum — (biology) the major taxonomic group of animals and plants; contains classes

• arthropod — invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
• Chelicerata, superclass Chelicerata — spiders; scorpions; horseshoe crabs
• superclass Myriapoda — used in some classifications to encompass the millipedes (Diplopoda) and centipedes (Chilopoda); formerly a large taxon including also the Pauropoda and Symphyla; the term Myriapoda now usually used synonymously with Diplopoda and limited to the millipedes
• Pauropoda, class Pauropoda — an obscure class of minute arthropods with branched antennae and 8 to 10 pairs of legs
• Symphyla, class Symphyla — small class of minute arthropods; unimportant except for the garden centipede
• Tardigrada, class Tardigrada — in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needle-like piercing organs connected with the pharynx
• Chilopoda, class Chilopoda — arthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes
• Diplopoda, class Diplopoda, Myriapoda, class Myriapoda — arthropods having the body composed of numerous double somites each with two pairs of legs: millipedes
• Pentastomida, subphylum Pentastomida — tongue worms
• Crustacea, class Crustacea — class of mandibulate arthropods including: lobsters; crabs; shrimps; woodlice; barnacles; decapods; water fleas
• Onychophora, class Onychophora — enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions; distinct from the phylum Annelida; resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids
• Insecta, class Insecta, Hexapoda, class Hexapoda — insects; about five-sixths of all known animal species
• insect — small air-breathing arthropod

• Animalia, kingdom Animalia, animal kingdom — taxonomic kingdom comprising all living or extinct animals