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An arthropod are the most dominant species and warlike.

  1. Alien xenomorph (Aliens)
  2. Inbit or Invid (Robotech or mospeada)
  3. Andorian (Star Trek) insects
  4. Klingon (Star Trek) crustaceans
  5. Decapodian (Futurama) crustaceans
  6. Species 8472 (Star Trek)
  7. megasquid (Future is Wild)

An arthropod is an invertebrate animal having anexoskeleton (external skeleton), a segmented body, and jointed appendages. Arthropods are members of the phylum Arthropoda(from Greek ἄρθρον árthron, "joint", and ποδός podós "foot", which together mean "jointed feet"), and include the insects,arachnids, crustaceans, and others.

  • Crustaceans (Crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at 0.1 mm (0.004 in), to the Japanese spider crab with a leg span of up to 12.5 ft (3.8 m) and a mass of 44 lb (20 kg). Like other arthropods, crustaceans have an exoskeleton, which theymoult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates by the possession ofbiramous (two-parted) limbs, and by the naupliusform of the larvae.
  • Insects (from Latin insectum, a calque of Greekἔντομον [éntomon], "cut into sections") are a class of living creatures within the arthropods that have achitinous exoskeleton, a three-part body (head,thorax, and abdomen), three pairs of jointed legs,compound eyes, and two antennae.
  • Arachnids are a class (Arachnida) of joint-leggedinvertebrate animals in the subphylum Chelicerata. All arachnids have eight legs, although in some species the front pair may convert to a sensory function. The term is derived from the Greek word ἀράχνη (aráchnē), meaning "spider". Almost all extant arachnids are terrestrial. However, some inhabit freshwater environments and, with the exception of the pelagic zone, marine environments as well. They comprise over 100,000 named species, including spiders,scorpions, harvestmen, ticks, mites and Solifugae.

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