Arthropods Main Characteristics Jointed appendages Segmented body Exoskeleton
Arthropods
Main Characteristics • • • Jointed appendages Segmented body Exoskeleton (skeleton on outside) Mandibles – chewing mouthparts Metamorphosis ( egg - larva - adult) Classification Kingdom Animalia , Phylum Arthropoda Various Subphylum
Subphyla (major groups) 1. Chelicerates (spiders and scorpions) 2. Crustaceans (lobsters, crabs, shrimp, crayfish) 3. Uniramia (insects, millipedes, centipedes)
Chelicerates • Spiders, ticks and scorpions • 2 body segments cephalothorax, abdomen • 8 legs • No antenna Spiders belong to a special group called *Arachnids
Spider Parts Chelicerae - specialized mouth parts used for biting Pedipalps - appendages near the mouth used to manipulate prey Spinnerets - used to secrete a web
Brown recluse bites cause necrosis (death of tissue).
Centipedes & Millipedes • Centipedes o o Predators, poisonous 1 pair of legs per segment o o Herbivores 2 pair of legs per segment • Millipedes
Insects • 3 pairs of legs • 1 pair of antennae • 3 body segments (head, thorax, abdomen) http: //shapeoflife. org/video/phyla/terrestrial-arthropods-conquerors
Beetles: Order Coleoptera
Order Siphonaptera
Crustaceans • Shrimp, lobsters, crabs, crayfish o 4 o 2 pairs of legs claws (chelipeds) pair of antennae http: //shapeoflife. org/video/phyla/marinearthropods-successful-design
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