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  1. 'Echidnapus': Australian scientists discover ancient monotreme

  2. Meet the 'Echidnapus,' an Extinct Creature That Resembles Both …

  3. Australian scientists discover ancient 'echidnapus' - BBC

  4. 'Echidnapus' fossil of potential echidna and platypus ancestor …

  5. 'Echidnapus' hints at a lost age of egg-laying mammals - Science …

  6. Echidnapus identified from an 'Age of Monotremes' - ScienceDaily

  7. Is the “echidnapus” the Rosetta Stone of early mammal evolution?

  8. Australian scientists discover ancient 'echidnapus' - Yahoo News

  9. Meet the ‘echidnapus’, a bizarre blend of the world’s strangest …

  10. Discovered: 150-year-old platypus and echidna specimens ... - ScienceDaily