1773, from Modern Latin (Linnaeus), from neuter plural of Late Latin mammalis, from mamma (see mammal).
Examples from the Web for mammalia
Historical Examples of mammalia
The other species of mammalia are generally hotter than human beings.The Field of Ice
The Morphology and Distribution of the wandering cells of Mammalia.Histology of the Blood
As for men, they would have existed only in treatises on the mammalia.
We know more about the feathered tribes than the mammalia of Mexico.The Western World
Maule appealed to the court: 'My lords, we are vertebrate animals, we are mammalia!Familiar Quotations