III. Mammalian Diversification (additional handout)

• A. Non-placental mammals (Prototheria)

• 1. Order Monotremata

  • primitive egg-laying mammals
  • Duck-billed platypus, spiny anteater (Echidna)
  • limited to Australia, Tasmania, New Guinea

• 2. Order Marsupialia

  • partial placenta, marsupium (pouch)
  • opossums, kangaroos, koala

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