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Urochordates = Tunicates = Sea squirts

Protochordates include. Urochordates = Tunicates = Sea squirts. (See figure 2-2 in text). Underappreciated beauty of tunicates. Dorsal hollow nerve cord. Muscular post anal tail. Notochord. Adhesive surface. Pharynx with endostyle. Larva “stands on its head” and attaches

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Urochordates = Tunicates = Sea squirts

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  1. Protochordates include Urochordates = Tunicates = Sea squirts (See figure 2-2 in text)

  2. Underappreciated beauty of tunicates

  3. Dorsal hollow nerve cord Muscular post anal tail Notochord Adhesive surface Pharynx with endostyle Larva “stands on its head” and attaches to surface

  4. Urochordate larva – diagrams don’t do it justice!

  5. Cephalochordates = Amphioxus = Lancelets (See figure 2-2 in text)

  6. Living Agnaths - Lamprey Hagfish Where’s the link to protochordates?

  7. Lamprey larva = Ammocoetes See figure 3-6 Tunicate larva

  8. Lamprey- Vertebrate Ectoparasites

  9. Estimates of 30-40lbs of fish killed by a lamprey in adult life span

  10. Human influences 1800’s Erie canal Weeland canal around Niagra falls !

  11. Lamprey Control: Exploiting basic natural history

  12. Lamprey Control: Larvicides and spawning barriers

  13. AKA Slime eels!

  14. Even Hagfish can be beautiful!

  15. Ordovician Agnaths - Ostracoderms

  16. A Recent Surprise – Vertebrates (or at least Craniates) in the Cambrian!!!! Haikouichthys Myllokumingia

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