Darwinopterus is a transitional fossil between the two groups.

Typical of transitional fossils is that some features are clearly basal or primitive.

It is considered a transitional fossil, in that it displays features of both groups.

It is the oldest frog known to science, and an excellent example of a transitional fossil.

Not to be confused with the evolutionary concept of a transitional fossil.

It is most commonly used to refer to any new transitional fossil finds.

Tiktaalik was therefore a transitional fossil, and an example of mosaic evolution.

It is commonly stated by critics of evolution that there are no known transitional fossils.

A transitional fossil from the common symmetric position is Amphistium.

Archaeopteryx was immediately seen as a transitional fossil that supported Darwin's theory.