Calvaria n. : The bones of the cranium; more especially, the bones of the domelike upper portion.

Example:
How does the Calvaria tree stay alive without the dodo bird?

Taxonomy
calvaria, base of the skull, free encyclopedia, bones, Sphenoid bone, Ethmoid, the brain, parietal bones, inner surface, skull-cap, depressions, cranial cavity, parietal, search, calva, skullcap, surrounds, temporal bones.

Defination from the web:
... includes the Ethmoid and Sphenoid bone in the Calvaria. Some books state that calvaria consists of just the frontal bone, parietal bone, ... In a fetus, the formation of the Calvaria involves a process known as intramembranous ossification, although the base of the skull (underlying ...