Figure 1: Changes in adult digit number across archosaur phylogeny. These data show three things: first, expression of the early cartilage marker Sox9 can persist even when multiple digits have ...

Dinosaurs are part of a larger group known as the archosaurs — a lineage of reptiles that split into a “bird-line” branch that includes pterosaurs, dinosaurs and birds, and a “crocodilian ...

With bony plates on its backbone, this archosaur fossil reveals that armor was a boomerang trait in the story of dinosaur and pterosaur evolution: the group's ancestors were armored, but this ...

Birds and crocodilians are archosaurs, the living relatives of ... would have been related to invasive air sacs prior to the evolution of pterosaurs and saurischian dinosaurs,” Tito Aureliano ...

Dinosaurs are part of a larger group known as the archosaurs — a lineage of reptiles that split into a “bird-line” branch that includes pterosaurs, dinosaurs and birds, and a “crocodilian ...

is the earliest diverging member of the bird line of archosaur evolution. The fossil, which is about 235 million years old, was found in 1997 in Madagascar by a team of researchers led by the ...

Dinosaurs are part of a larger group known as the archosaurs – a lineage of reptiles that split into a “bird-line” branch that includes pterosaurs, dinosaurs and birds, and a “crocodilian ...