For example, the Ornithosuchus is the most important transitional species of the infra-order carnosauria.

Archaeopteryx is considered a prime transitional species in the evolution of some reptiles, probably dinosaurs, into today's birds.

Transitions between higher groups would involve a series of transitional species, only a few of which may be found as fossils.

Some species are said to have evolved suddenly from single mutations without transitional species.

Most paleontologists, especially the experts on dinosaurs, view it as a transitional species.

The fossil record provides examples of transitional species that demonstrate ancestral links between past and present life forms.

This suggests that it is a transitional species between extinct land mammals and modern cetaceans.

But there has been no agreement on whether the earlier Homo was of the habilis species or a different, transitional species.

Scientists said there could still be other transitional species closer to the common ancestor of apes and humans.

It is notable as a transitional species in cetacean evolution.