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Silurian, Devonian - Coggle Diagram

- - - - Mixopterus
        length:30-80 cm
      - Pterygotus
        length: 1,70 cm
      - Scyphocrinus
        length: 1-3m
  - - - Ampyx l
        ength 3-5 cms
- - - - Tiktaalik
        Length: 2 m