INVERTEBRATE DIVERSITY SECTION (Biol.201), Spr 2000

Dr. Kathy S. Williams (email kwilliams@sunstroke.sdsu.edu)

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OUTLINE OF ANIMLAS DISCUSSED IN THIS SECTION

ANIMALS without tissues

Porifera (sponges) DIPLOBLASTIC ANIMALS Radiata  
Example Cnidaria (anemones, jellyfish, corals)

U hydra (Hydrozoa)

U jellyfish (Scyphazoa)

U corals, anemones (Anthazoa)

 BILATERIA ACOELOMATE Bilateria  
Example Platyhelmenthes (flatworms)

U free-living Turbellaria

U tapeworms (Cestoda)

U flukes (Trematoda)
 

 PSEUDOCOELOMATE Bilateria  
Example Nematoda (roundworms) COELOMATE PROTOSTOMES  
Example Mollusca (U Chitons (Polyplacophora))
U Bivalvia (clams, oysters, scallops, mussels)

U Gastropoda (snails, limpets, abalones, slugs, nudibranchs)

U Cephalopoda (nautiluses, squids, octopuses)
 

 Example Annelida (annelid worms)
  U Polychaeta

U Oligochaeta ( earthworms)

U Hirudinea (leeches)
 

 Examples Onychophorans & Tardigrades

Example Arthropods

  U Trilobites (Trilobita)   U Chelicerata
  Merostomata (horseshoe crabs) Arachnida (spiders, scorpions, mites, & relatives) U Crustacea, crabs, shrimp, & lobsters, barnacles & pillbugs

U Uniramia

  Myriapoda Chilapoda

Diplopoda
 

 Insects Incomplete metamorphosis, grasshoppers,
cockroaches

Complete metamorphosis, beetles (Coleoptera),
flies & mosquitoes (Diptera), & butterflies & moths (Lepidoptera)

 COELOMATE DEUTEROSTOMES  
Example Echinodermata
  U crinoids (Crinoidea)

U sea stars (Asteroidea)

U brittle stars (Ophiuroidea)

U sea urchins (Echinoidea)

U sea cucumbers (Holothuroidea)

 … more to come …