Six monotremes living in the same place at the same time, 100 million years ago at Lightning Ridge, NSW. Clockwise from lower left: Opalios splendens, a newly described species dubbed an ...
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Jurassic Fossil Discovery Leads to New Mammal TheoryOne of the new species is a type of ancient mammal called a shuotheriid ... which includes modern monotremes like echidnas and platypuses. However, this classification has long been contested ...
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