Monotremes, now known only from the platypus and a handful of echidna species, were once a much more successful order, with three new species now identified from a single geologic formation. Yet ...

Ancient Species Represents Bridge Between Echidna and Platypus Australian excavation expands the monotreme family, paints picture of a landscape dominated by furry, egg-laying mammals.

The fossil discoveries double the number of known monotreme species during the Cretaceous Period.

Australian researchers have found evidence of the oldest known platypus and a new species, dubbed 'echidnapus', which has a platypus-like anatomy alongside features that more closely resemble an ...

The species is believed to be related to the platypus and echidna, which are the only living monotremes.

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 ...

An international collaboration of researchers, led by Smithsonian scientists, identified five new species of soft-furred hedgehogs.

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 &lsquo ...

The species is believed to be related to the platypus and echidna, which are the only living monotremes.

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 ...