SEAN KENT
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Key Characteristics
Key evolutionary innovation: Notochord
Deutrostome coelomates
Internal endoskeleton
Notocord: flexible rod
Develops along the back of the embryo
Species diversity: 56,000 species
All chordates have these characteristics during sometime in the their life, specifically as an embryo or larva.
Notochord
Dorsal hollow nerve cord
Pharyngeal pouches
Postanal tail
Vertebrates
Backbone
Skull protecting a brain
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