Invertebrate Zoology

  1. Phylum Hemichordata
    1. General Characteristics
      1. Deuterostome Features
        1. Pharyngeal Slits
          1. Stomochord
          2. Class Enteropneusta
            1. Acorn Worms
              1. Burrowing Lifestyle
                1. Feeding Mechanisms
                2. Class Pterobranchia
                  1. Colonial Organization
                    1. Filter Feeding
                      1. Tube Construction
                      2. Evolutionary Significance
                        1. Chordate Relationships
                          1. Phylogenetic Position

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                        13. Phylum Echinodermata

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                        15. Phylum Chordata