Although yeast is a simple organism, its molecular biology is a lot more mammal-like than a bacterium's.

ECONOMIST: Synthetic biology: Expanded vocabulary | The

The Hispaniolan solenodon is a shrew like mammal that possesses a venomous bite and grooved fangs, more usually found in reptiles.

BBC: Durrell monkey on new BBC Attenborough show

Only the Cape genet (a spotted, cat-like mammal native to southern Africa) attempts any level of interaction with us on the first night, skulking just outside the light circle of the campfire in anticipation of some leftovers, having become accustomed to the free handouts at the overnight stopping points.

WSJ: Trekking in Otter Space

The progress of his editions on our shelf was like a cartoon of evolution, a slug crawling from the surf to become a mammal, a monkey, and then at last a hairless noble fellow gazing into the future.

NEWYORKER: The King of Sentences