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•   Fw & m                                                              Porifera•   Suspension feeders•   Lack true tissue...
Cnidarians• True tissue           4 classes:• Gastrovascular cavity  (mouth = anus)• 2 forms: polyp &  medusa• Cnidocytes•...
Back to CnidariansHydrozoa• Most m, few fw• Polyp & medusa stages  in most sp• Polyp stage often  colonial
Back to CnidariansScyphozoa     •   All m     •   Polyp reduced     •   Free swimming medusa     •   Up to 2m in d
Back to Cnidarians                            Cubozoa• All m• Box-shaped medusa• Highly toxic cnidocytes   – Sea wasp (Chi...
Back to CnidariansAnthozoa    •   All m    •   Medusa absent    •   Most sessile    •   Many colonial
Platyhelminthes• Bilateral symmetry   4 classes:• Free living &  parasitic• Microscopic -20m• Triploblastic• Acoelomate
Back to Platyhelminthes    Turbellaria    • Mostly m, some fw, few      terr    • Predators & scavengers    • Body surface...
Back to Platyhelminthes                          Monogenea                               • M & fw parasites               ...
Back to Platyhelminthes                          Trematoda    • Parasites of mainly verts    • 2 suckers attach to host   ...
Back to Platyhelminthes              Cestoda• Parasites of verts• Scolex attaches to  host• Proglottids prod eggs  and bre...
Rotifers• Specialized organ  systems• Alimentary canal  (digestive tube w/2  openings)• Psuedocoelomate• Parthenogenesis (...
Ectoprocts - bryozoansLophophorates• Lophophore – horseshoe-  shaped or circular crown                                  Ph...
Nermeteans• Proboscis & ribbon  worms• Acoelomate• 1mm-sev m• Some toxic• Motly m• Swim or burrow• Closed circulatory  sys...
Molluscs• Mostly m, some fw, some terr• Soft bodied• Most protected by CaCO3 shell, some have  reduced, internal shell or ...
Chitons•   Polyplacophora•   M•   Shell w/8 plates•   Foot for locomotion•   Radula•   No head
Gastropods•   Torsion•   Asymmetrical body•   Foot for locomotion•   Radula
Bivalves•   M & fw•   Flattened shell w/2 halves•   Head reduced•   No radula•   Paired gills•   Most suspension feeders• ...
Cephalopods• Head surrounded by grasping tentacles• Locomotion by jet propulsion using siphon  made from foot• Only mollus...
Annelids• Segmented worms, fw & damp soil• Length <1mm-3m• 3groups:   Oligochaeta     Polychaeta              Hirudinea  R...
Nematodes•   Roundworms•   most widespread of all animals•   Cuticle – tough outer coat•   Alimentary canal•   No circ sys...
Arthropods• Hard exoskeleton (protein + chitin)  – Molting/ecdysis• Jointed appendages• Open circ sys• 4 groups:
Cheliceriformes• 1-2 main body parts• 6 prs of appendages• Mostly terr or m
Myriapoda•Distinct head w/antenna•Chewing mouth parts•TerrMillipedes                     Centipedes• Herbivorous          ...
Hexapoda• 3 body segments• Antenna present• Mouthparts modified  for chewing, sucking  or lapping• 3 prs of legs• Us. 2 pr...
Crustacea•   Body 2-3 parts•   Antenna pres•   Chewing mouthparts•   3+ prs of legs•   Mostly m & fw
DeuterostomesEchinoderms                  Chordates• Spiny skin                 •   Doral hollow nerve cord• Slow moving o...
Ap 11 invertebrates
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Ap 11 invertebrates

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Ap 11 invertebrates

  1. 1. • Fw & m Porifera• Suspension feeders• Lack true tissue• Asymmetrical• Sequential hermaphrodites – (1 then other)• Produce antibiotics & other defensive cmpds – (Pettit @ AzSU cribostatin – can kill penicillin resistant strains of Strep & looking for anticancer cmpds)
  2. 2. Cnidarians• True tissue 4 classes:• Gastrovascular cavity (mouth = anus)• 2 forms: polyp & medusa• Cnidocytes• Nematocysts (stinging cells)
  3. 3. Back to CnidariansHydrozoa• Most m, few fw• Polyp & medusa stages in most sp• Polyp stage often colonial
  4. 4. Back to CnidariansScyphozoa • All m • Polyp reduced • Free swimming medusa • Up to 2m in d
  5. 5. Back to Cnidarians Cubozoa• All m• Box-shaped medusa• Highly toxic cnidocytes – Sea wasp (Chironex fleckeri) n Australia • Intense pain • Respiratory failure • Cardiac arrest • Death w/in min • Amt of poison in 1 org can kill 60 people
  6. 6. Back to CnidariansAnthozoa • All m • Medusa absent • Most sessile • Many colonial
  7. 7. Platyhelminthes• Bilateral symmetry 4 classes:• Free living & parasitic• Microscopic -20m• Triploblastic• Acoelomate
  8. 8. Back to Platyhelminthes Turbellaria • Mostly m, some fw, few terr • Predators & scavengers • Body surface ciliated
  9. 9. Back to Platyhelminthes Monogenea • M & fw parasites • Most infect surfaces of fishes • Simple life history • Ciliated larva starts host infection
  10. 10. Back to Platyhelminthes Trematoda • Parasites of mainly verts • 2 suckers attach to host • Most life cycles include intermediate hosts
  11. 11. Back to Platyhelminthes Cestoda• Parasites of verts• Scolex attaches to host• Proglottids prod eggs and break off after fert• No head of digestive system• Lc with 1 or more intmdt host
  12. 12. Rotifers• Specialized organ systems• Alimentary canal (digestive tube w/2 openings)• Psuedocoelomate• Parthenogenesis (only females – make only females from unfert eggs)
  13. 13. Ectoprocts - bryozoansLophophorates• Lophophore – horseshoe- shaped or circular crown Phoronids – tube- dwelling marine worms of ciliated tentacles that surround mouth• Coelomates Brachiopods – lamp shells – dorsal /ventral shells instead of bivalve lateral
  14. 14. Nermeteans• Proboscis & ribbon worms• Acoelomate• 1mm-sev m• Some toxic• Motly m• Swim or burrow• Closed circulatory system, no heart
  15. 15. Molluscs• Mostly m, some fw, some terr• Soft bodied• Most protected by CaCO3 shell, some have reduced, internal shell or no shell• Muscular foot, visceral mass, mantle, radula• Trochophore (ciliated larval stage)• 4 classes:
  16. 16. Chitons• Polyplacophora• M• Shell w/8 plates• Foot for locomotion• Radula• No head
  17. 17. Gastropods• Torsion• Asymmetrical body• Foot for locomotion• Radula
  18. 18. Bivalves• M & fw• Flattened shell w/2 halves• Head reduced• No radula• Paired gills• Most suspension feeders• Mantle forms siphons
  19. 19. Cephalopods• Head surrounded by grasping tentacles• Locomotion by jet propulsion using siphon made from foot• Only mollusc w/ closed circ sys
  20. 20. Annelids• Segmented worms, fw & damp soil• Length <1mm-3m• 3groups: Oligochaeta Polychaeta Hirudinea Reduced head Well developed head Body flattened No parapodia Each segment has Reduced coelom and chaeta parapodia w/chaeta seg Tube dwelling & free Chaetae ab living Suckers @ ant & post ends Parasites, predators & scavengers
  21. 21. Nematodes• Roundworms• most widespread of all animals• Cuticle – tough outer coat• Alimentary canal• No circ sys, nut spread thru fluid in psd-c• Soil• Trichinosis
  22. 22. Arthropods• Hard exoskeleton (protein + chitin) – Molting/ecdysis• Jointed appendages• Open circ sys• 4 groups:
  23. 23. Cheliceriformes• 1-2 main body parts• 6 prs of appendages• Mostly terr or m
  24. 24. Myriapoda•Distinct head w/antenna•Chewing mouth parts•TerrMillipedes Centipedes• Herbivorous • Carnivorous• 2 prs walking legs/segment • 1 pr walking legs/segment • Poison claws on first body segment
  25. 25. Hexapoda• 3 body segments• Antenna present• Mouthparts modified for chewing, sucking or lapping• 3 prs of legs• Us. 2 prs of wings• Mostly terr
  26. 26. Crustacea• Body 2-3 parts• Antenna pres• Chewing mouthparts• 3+ prs of legs• Mostly m & fw
  27. 27. DeuterostomesEchinoderms Chordates• Spiny skin • Doral hollow nerve cord• Slow moving or sessile • Notochord• Water vascular sys • Post anal tail• Tube feet • Pharyngeal slits• Radial (adult) bilateral (larvae)• 6 groups

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