Archosauromorpha is a clade of reptiles that includes all modern birds and crocodilians, as well as their extinct relatives. This group is characterized by specific features in their skull and limb structure, which distinguish them from other reptiles. They first appeared during the late Permian period and have since diversified into various forms. Members of Archosauromorpha are known for their adaptations to different environments, ranging from terrestrial to aquatic habitats. This clade played a significant role in the evolution of reptiles, leading to the emergence of the Archosaurs, which include dinosaurs and modern birds.