| A | B |
|---|
| Synapsids | Member of an amniote clade distinguished by a single hole on each side of the skull, including the mammals |
| Sauropods | A very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head a long neck and tail and five-toed limbs |
| Anapsids | An amniote whose skull does not have openings near the temples |
| Diapsids | member of an amniote clade distinguished by a pair of holes on each side of the skull, including the lepiodsaurs and archosaurs |
| Therapsids | A group of synapsids that includes mammals and their immediate evolutionary ancestors |
| Endothermic | Referring to organisms with bodies that are warmed by heat generated by metabolism. This heat is usually use to maintain a relatively stable body temperature higher than that of the external environment |
| Chelonia | Of or relating to a turtle or tortoise |
| Squamata | Scaled reptiles including lizards and snakes |
| Crocodilia | An order of large reptiles that appeared about 84 million years ago in the late Cretaceous Period |
| Class Aves | The class of birds |
| Ratites | Fightless birds having flat breastbones lacking a keel for attachment of flight muscles |
| Carinates | Birds having keeled breastbones for attachment of flight muscles |
| Passeriforms | Largest order of birds comprising about half the known species; rooks; finches; sparrows; warblers; robins; wrens; swallows; etc. |
| Class Mammalia | Warm-blooded vertebrates characterized by mammary glands in the female |
| Placenta | An organ that connects the developing fetus to the uterine wall to allow nutrient uptake |
| Monotremes | A mammal that lays eggs |
| Eutherial mammals | Mammals having a placenta |
| Prosimians | A suborder of primates that includes the lemurs, lorises, and tarsiers |
| Anthropoids | Having characteristics of a human being, usually in terms of shape or appearance |
| Paleoanthropology | The scientific study of human fossils |
| Mosaic evolution | The occurrence, within a given population of organisms, of different rates of evolutionary change in various body structures and functions |
