Arthropods -KEY

Original File: Arthropod-chart.html

Arthropods are animals that have jointed legs. Three-fourths of all the different animal types belong to this group. For each group below, determine the name of the group and give examples.

Class or Subphylum

Characteristics

Examples
Diplopoda
  • round body
  • segented body
  • two pairs of legs per segment
  • also known as myriapods
  • "thousand feet"
 Millipedes
Chilopoda
  • flattened body
  • segmented body
  • one pair of legs per segment
  • myriapods
  • "hundred feet"
 Centipedes
Crustacea
  • hard
  • flexible exoskeleton
  • gills
  • branched attenae
  • two body sections - abdomen, cephalothorax
  • mostly aquatic
 crabs, lobster, crayfish
Arachnida
  • two body sections - abdomen, cephalothorax
  • no antennae
  • four pairs of legs
  • chelicerae
  • pedipalps
  • spinnerets
 spider, scorpions
Insecta
  • three body sections
  • one pair of antennae (unbranched)
  • three pairs of legs
  • mandibles
 wasps, ladybugs, grasshoppers, cockroaches, ants