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Animal Diversity. Figure 32.4 A traditional view of animal diversity based on body-plan grades. Figure 32.8 Animal phylogeny based on sequencing of SSU-rRNA. Figure 32.5 Body symmetry. Figure 32.13x Burgess Shale fossils.

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phylum porifera
Phylum Porifera
  • Sponges
  • “colony” of flagellated cells
  • individual cells can potentially regenerate into a new individual
phylum cnidaria
Phylum Cnidaria
  • Hydras, jellyfish, sea anemones, corals
  • gastrovascular cavity
  • stinging cells
  • Radiata
phylum ctenophora
Phylum Ctenophora
  • Comb jellies
  • comblike ciliary plates
  • gastrovascular cavity
  • Radiata
phylum platyhelminthes
Phylum Platyhelminthes
  • Flatworms
  • dorsoventrally flattened
  • no segmentation
  • gastrovascular cavity
  • bilateral, no coelom, protostome
phylum rotifera
Phylum Rotifera
  • Ciliated crown
  • no digestive system
  • bilateral, pseudocoelomates, protostome
phylum nematoda
Phylum Nematoda
  • Roundworms
  • unsegmented
  • no circulatory system
  • bilateral, pseudocoelomate, protostome
lophophorates several phyla
Lophophorates - several phyla
  • Bryozoans, lampshells (brachiopods)
  • bilateral, coelomate, protostome
phylum mollusca
Phylum Mollusca
  • Clams, snails, squids
  • foot, visceral mass, mantle
  • bilateral, coelomate, protostome
phylum annelida
Phylum Annelida
  • Segmented worms
  • bilateral, coelomate, protostome
phylum arthropoda
Phylum Arthropoda
  • Crustaceans, insects, spiders
  • segmented body, jointed appendages, exoskeleton
  • bilateral, coelomate, protostome
phylum echinodermata
Phylum Echinodermata
  • Starfish, sea urchins
  • bilateral, coelomate, deuterostome
phylum chordata
Phylum Chordata
  • Lancelets, tunicates, vertebrates
  • notochord, nerve cord
  • bilateral, coelomate, deuterostome