Editing Permian–Triassic extinction event (section)

====Sauropsids====
[[Archosaurs]] (which included the ancestors of dinosaurs and [[crocodilia]]ns) were initially rarer than therapsids, but they began to displace therapsids in the mid-Triassic. Olenekian tooth fossil assemblages from the Karoo Basin indicate that archosauromorphs were already highly diverse by this point in time, though not very ecologically specialised.<ref>{{cite journal |last1=Hoffmann |first1=Devin K. |last2=Hancox |first2=John P. |last3=Nesbitt |first3=Sterling J. |date=1 May 2023 |title=A diverse diapsid tooth assemblage from the Early Triassic (Driefontein locality, South Africa) records the recovery of diapsids following the end-Permian mass extinction |journal=[[PLOS ONE]] |volume=18 |issue=5 |pages=e0285111 |doi=10.1371/journal.pone.0285111 |pmid=37126508 |pmc=10150976 |bibcode=2023PLoSO..1885111H |doi-access=free }}</ref> In the mid to late Triassic, the [[dinosaur]]s evolved from one group of archosaurs, and went on to dominate terrestrial ecosystems during the [[Jurassic]] and [[Cretaceous]].<ref name="BentonVertebratePaleontology">{{cite book|author=Benton, M.J.|author-link = Michael Benton| year=2004|title=Vertebrate Paleontology|publisher=Blackwell Publishers|pages=xii–452|isbn=978-0-632-05614-9|no-pp=true|title-link = Vertebrate Palaeontology (Benton)}}</ref> This "Triassic Takeover" may have contributed to the [[evolution of mammals]] by forcing the surviving therapsids and their [[mammaliformes|mammaliform]] successors to live as small, mainly [[Nocturnality|nocturnal]] [[insectivore]]s; nocturnal life probably forced at least the mammaliforms to develop fur, better [[hearing]] and higher [[metabolic rate]]s,<ref name="RubenJones2000FurAndFeathers">{{cite journal |author1=Ruben, J.A. |author2=Jones, T.D. |name-list-style=amp | title=Selective Factors Associated with the Origin of Fur and Feathers | journal=[[American Zoologist]] | year=2000 | volume=40 | issue=4 | pages=585–596 |doi=10.1093/icb/40.4.585 | doi-access=free }}</ref> while losing part of the differential color-sensitive retinal receptors reptilians and birds preserved. Archosaurs also experienced an increase in metabolic rates over time during the Early Triassic.<ref>{{cite journal |last1=Benton |first1=Michael James |date=December 2021 |title=The origin of endothermy in synapsids and archosaurs and arms races in the Triassic |journal=[[Gondwana Research]] |volume=100 |pages=261–289 |doi=10.1016/j.gr.2020.08.003 |bibcode=2021GondR.100..261B |s2cid=222247711 |doi-access=free }}</ref> The archosaur dominance would end again due to the [[Cretaceous–Paleogene extinction event]], after which both [[birds]] (only extant dinosaurs) and mammals (only extant synapsids) would diversify and share the world.