Norian extinctions

Rhynchosaurs are a group of extinct herbivorous Triassic archosauromorph reptiles, belonging to the order Rhynchosauria. Members of the group are distinguished by their triangular skulls and elongated, beak like premaxillary bones. Rhynchosaurs first appeared in the Early Triassic, reaching their broadest abundance and a global distribution during the Carnian stage of the Late Triassic.

Lagerpetidae (; originally Lagerpetonidae) is a family of basal avemetatarsalians (early-diverging members of the reptile lineage leading to birds and other dinosaurs). Though traditionally considered the earliest-diverging dinosauromorphs (archosaurs closer to dinosaurs than to pterosaurs), fossils described in 2020 suggested that lagerpetids are instead an early branch of pterosauromorphs (closer to pterosaurs than to dinosaurs). Lagerpetid fossils are known from the Triassic of San Juan (Argentina), Arizona, New Mexico, and Texas (United States), Rio Grande do Sul (Brazil), India and Madaga

Proterochampsidae is a family of proterochampsian archosauriforms. Proterochampsids may have filled an ecological niche similar to modern crocodiles, and had a general crocodile-like appearance. They lived in what is now South America in the Middle and Late Triassic.

Kuehneosauridae is an extinct family of small, lizard-like gliding diapsids known from the Triassic period of Europe and North America.

Stahleckeriidae is a family of large dicynodont therapsids whose fossils are known from the Triassic of North America, South America, Asia and Africa.

left|thumb|Life restoration of Proterochampsa barrionuevoi Proterochampsia is a clade of early archosauriform reptiles from the Triassic period. It includes the Proterochampsidae (e.g. Proterochampsa, Chanaresuchus and Tropidosuchus) and probably also the Doswelliidae. Nesbitt (2011) defines Proterochampsia as a stem-based taxon that includes Proterochampsa barrionuevoi and all forms more closely related to it than Euparkeria capensis, Erythrosuchus africanus, Passer domesticus (the House Sparrow), or Crocodylus niloticus (the Nile crocodile). Therefore, the inclusion of Doswelliidae in it is

Erpetosuchidae is an extinct family of pseudosuchian archosaurs. Erpetosuchidae was named by D. M. S. Watson in 1917 to include Erpetosuchus. It includes the type species Erpetosuchus granti from the Late Triassic of Scotland, Erpetosuchus sp. from the Late Triassic of eastern United States and Parringtonia gracilis from the middle Middle Triassic of Tanzania; the group might also include Dyoplax arenaceus from the Late Triassic of Germany, Archeopelta arborensis and Pagosvenator candelariensis from Brazil and Tarjadia ruthae from Argentina.

Hyperodapedontinae is a subfamily of rhynchosaurs within the family Rhynchosauridae. Fossils have been found in Argentina, Brazil, Canada, India, Madagascar, Scotland, Tanzania, the United States, and Zimbabwe.