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ANIMAL VERTEBRATE EVOLUTION & DIVERSITY (CHORDATA (Example (Tunicates…
ANIMAL VERTEBRATE EVOLUTION & DIVERSITY
CHORDATA
Notochord
Paryngeal slits
Dorsal, hollow neck cord
Post-anal tails
Example
Tunicates
Lancelet
Hagfishes
FISH
Types
Cartilaginous
Bony fishes
Diversity
Vertebrate
Cranium
Lack jaws
TETRAPOD
REPTILE
Diverse during Mesozoic era
Adaptation
Scaled, waterproof skin
Amniotic egg
MAMMAL
First mammal arose 200 MYA and probably small, noctural insect
Hallmark
Mammary gland
Hair
Group
Marsupial
Eutherian, placental mammal
Monostreme
AMPHIBIAN
Mixture of aquatic & terrestrial
Descent from fish have lung
& fin with muscle
Undergo metamorphosis
BIRD
Adaptation
One ovary
Have beak
Honeycombed bone
Evolve from a lineage of small, two-legged dinasour during the great reptilian radiation during Mesozoic era
• Bird= endotherm
• Nonbird= ectotherm/cold-blooded