Vertebrate Paleontology

  1. Early Vertebrate Evolution
    1. Chordate Origins
      1. Deuterostome Relationships
        1. Hemichordate Connections
          1. Echinoderm Affinities
            1. Molecular Phylogenetic Evidence
            2. Cambrian Chordates
              1. Pikaia
                1. Yunnanozoon
                  1. Haikouella
                    1. Myllokunmingia
                    2. Early Craniates
                      1. Haikouichthys
                        1. Zhongjianichthys
                          1. Craniate Characteristics
                            1. Neural Crest Evolution
                            2. Agnathan Diversity
                              1. Conodont Animals
                                1. Conodont Elements
                                  1. Body Fossil Evidence
                                    1. Feeding Mechanisms
                                    2. Ostracoderms
                                      1. Heterostraci
                                        1. Pteraspidiformes
                                          1. Cyathaspidiformes
                                          2. Osteostraci
                                            1. Cephalaspidiformes
                                              1. Sensory Systems
                                              2. Anaspida
                                                1. Body Plan
                                                  1. Swimming Adaptations
                                                  2. Thelodonti
                                                    1. Scale Morphology
                                                      1. Ecological Roles
                                                    2. Extant Jawless Fishes
                                                      1. Petromyzontiformes
                                                        1. Myxiniformes
                                                          1. Evolutionary Relationships

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                                                      4. Vertebrate Anatomy and Systematics

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                                                      6. Gnathostome Origins and Early Jawed Fishes