CRUSTACEANS

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CRUSTACEANS

• PETRA BÍROVÁ

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General features

• Almost all crustaceans have an exoskeleton
  hardened with calcium salts that covers most of
  the animal as a protective shell carapace.
• All have 2 pair of antennae

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Body morphology
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Body anatomy
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Nauplius
Almost allof crustaceans have distinctive larval
form- nauplius. It undergoes a series of molts
before it takes on its adult form.
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Terrestrial crustaceans (Isopods)

• Widespread group of terrestrial crustaceans- pill
  bugs and sow bugs.
• - among leafy ground litter in gardens and woods

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Copepods

• Major food source for humans and for some animals
• Among the most abundant multicellular organisms
  on Earth
• Key food source in marine food chain
• Krill- chief food f.e. For the whales

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Daphnia (water flea)
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Cyclop
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Decapods

• Head and thorax is fused into a single
  cephalothorax
• Cephalothorax is covered on top by protective
  shield- carapace
• Anterior pair of leg are modified into pincers
  (chelipeds)
• Swimmerets- apandages attached to the underside
  of the abdomen- swimming, reproduction
• Uropods- paddlelike appandages at the end of the
  abdomen
• Telson (tail spine)

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Crabs
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Crayfish
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Sessile crustaceans- barnacles
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