monotremes

A truly bizarre and unique assortment of animals, including marsupials (kangaroo and koala bear) and monotremes (platypus and echidna), have carved niches for themselves in its barren earth.

Late, Late at Night Rick Springfield 2010

A truly bizarre and unique assortment of animals, including marsupials (kangaroo and koala bear) and monotremes (platypus and echidna), have carved niches for themselves in its barren earth.

Late, Late at Night Rick Springfield 2010

A truly bizarre and unique assortment of animals, including marsupials (kangaroo and koala bear) and monotremes (platypus and echidna), have carved niches for themselves in its barren earth.

Late, Late at Night Rick Springfield 2010

A more solid answer would emerge if, for instance, the molecular networks behind the formation of the appendix in monotremes and humans were compared, and found to use the same toolkit of genes — then we'd have to regard it as highly probable that they are homologous, and the last common ancestor had an appendix.

Evolution of the appendix? - The Panda's Thumb 2009

That's interesting: the only groups that have an appendix are the Glires rodents and rabbits, primates, monotremes, and some marsupials.

Evolution of the appendix? - The Panda's Thumb 2009

The platypus is one of only three monotremes - egg-laying mammals - in the world.

Archive 2007-01-01 2007

The mammal fauna includes 2 monotremes, 37 marsupials, 16 rodents and 34 bats.

Wet Tropics of Queensland World Heritage Site, Australia 2008

Just so everyone knows, they are definately _not_ monotremes or therian mammals.

The most inconvenient seal Darren Naish 2006

To the examples Tommy listed I would add monotremes.

Are Sumatran rhinos really ‘living fossils’? Darren Naish 2006

These include two species of monotremes, 32 marsupial species, 31 bat species and 10 species of rodent.

Central Eastern Rainforest Reserves, Australia 2008