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 ...

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 ...

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 ...

Early archosaur evolution is characterized by high rates of homoplasy, long ghost lineages, and high rates of character evolution. These data imply that much of the early history of Archosauria has ...

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 ...

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 ...