ARTHROPODS: Jointed-Legged Invertebrates - PowerPoint PPT Presentation

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ARTHROPODS: Jointed-Legged Invertebrates

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ARTHROPODS: Jointed-Legged Invertebrates TSW describe the characteristics of arthropods that inhabit the marine environment CHARACTERISTICS Chitinous exoskeleton ... – PowerPoint PPT presentation

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Title: ARTHROPODS: Jointed-Legged Invertebrates


1
ARTHROPODS Jointed-Legged Invertebrates
  • TSW describe the characteristics of arthropods
    that inhabit the marine environment

2
CHARACTERISTICS
  • Chitinous exoskeleton
  • Paired, jointed appendages
  • Growth with ecdysis (molting)
  • Open circulatory system
  • Complete digestive tract

3
EXOSKELETON
  • MAJOR REASON FOR SUCCESS!!!
  • Provides
  • Support
  • Protection
  • Prevention of dehydration
  • Sites for muscle attachment

4
METAMORPHOSIS
  • Change body form from immature (larval) stages to
    adult forms
  • Reduces competition between stages for
  • Food
  • Living Space

5
TAXONOMY
  • 4 Subphyla
  • Trilobitomorpha (ALL extinct)
  • Chelicerata
  • Crustacea
  • Uniramia

6
CHELICERATA
  • Mouth parts called Chelicerae
  • Two body sections (cephalothorax abdomen)
  • Most have 4 pairs of walking legs
  • EX. Horseshoe crabs

7
VENTRAL VIEW
8
DORSAL VIEW
9
CRUSTACEA
  • 2 pairs of antennae
  • 2 or 3 body sections
  • Chewing mouthparts called Mandibles
  • EX. Shrimp, lobsters, crayfish, water fleas,
    fairy shrimp, brine shrimp, barnacles

10
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11
NERVOUS SYSTEM
  • Johnstons Organs Hearing, on antennae
  • Tympanic Organs Hearing, on legs body
  • Compound Eyes Facets, ommatidia (fused)
  • Simple Eyes Ocelli

12
Economic Impact
  • Food
  • Symbiontswhat does this mean?
  • Recycling Fouling

13
(No Transcript)
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