The first bird, the Archeopterix, still had the jaws and teeth and tail of its reptilian ancestors.

Our reptilian ancestors replaced their teeth continuously, as do lizards today.

In this sense, Reptilia was a node-based taxon because the first reptilian common ancestor would have been a "node" on the phylogenetic tree.

Doubtless her reptilian ancestors would have been pleased with the smile that thought brought to her lips.

The anatomy of pterosaurs was highly modified from their reptilian ancestors by the demands of flight.

Scientists have found a collection of 225-million-year-old fossils in Virginia, many of them the remains of mammals' closest reptilian ancestors.

The drawback to the fixed dentition is that worn teeth cannot be replaced, as was possible for the reptilian ancestors of mammaliaforms.

This is, of course, precisely true: snakes have evolved from four-legged reptilian ancestors resembling dragons.

Life persevered, and around 230 Ma, dinosaurs split off from their reptilian ancestors.

Birds thus did not evolve from dinosaurs but shared with them a common reptilian ancestor at a much earlier time.