Abstract
Archosauriformes consists of Archosauria and its relatives stem-taxa. During the Triassic, archosaurs diverged into two major lineages: Pseudosuchia ("pro-crocodilian") and Ornithosuchia ("pro-avian"). The Ornithosuchia is a well-know and studied lineage. In contrast, the Pseudosuchia lineage and the Archosauriformes non-archosaurian have several uncertainties about their evolution, such …