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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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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 to surface
Cephalochordates = Amphioxus = Lancelets (See figure 2-2 in text)
Living Agnaths - Lamprey Hagfish Where’s the link to protochordates?
Lamprey larva = Ammocoetes See figure 3-6 Tunicate larva
Estimates of 30-40lbs of fish killed by a lamprey in adult life span
Human influences 1800’s Erie canal Weeland canal around Niagra falls !
A Recent Surprise – Vertebrates (or at least Craniates) in the Cambrian!!!! Haikouichthys Myllokumingia