This type is the ancestral form from which the others were derived.

It is thought to be the closest tree-kangaroo to the ancestral form.

As an embryo develops, it takes on a series of ancestral forms.

Miller is a prototype - the primitive, ancestral form.

No fingers; perhaps this was a stylized, post-Introdus version of the ancestral form.

The rhythmic patterns of Muak have changed little in the last 500 years and remain close to their original ancestral form.

This population shows the most recent divergence from the ancestral form with an estimated 3000 generations of breeding within Australia.

For example, since all mammals have a cerebral cortex we must assume that the ancestral form also had one.

That is the ancestral form of dumpling in superior soup.

Insects are not, however, the ancestral form of the other arthropods discussed here.