A living monotreme lineage with fossil relatives that extend its geographical history beyond the present distribution.

Ancestors (14)

  1. Monotreme
  2. Mammal
  3. Mammaliaform
  4. Cynodont
  5. Therapsid
  6. Synapsid
  7. Amniote
  8. Tetrapod
  9. Vertebrate
  10. Animal
  11. Eukaryote
  12. Organism
  13. Biology
  14. Home

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