Editing Jurassic (section)

===== Birds =====
[[File:Archaeopteryx lithographica (Berlin specimen).jpg|thumb|upright|''[[Archaeopteryx|Archaeopteryx lithographica]]'' from the Late Jurassic (Tithonian) of Germany|alt=Fossil of complete Archaeopteryx, including indentations of feathers on wings and tail]]
The earliest [[Avialae|avialans]], which include birds and their ancestors, appear during the Middle to Late Jurassic, definitively represented by ''[[Archaeopteryx]]'' from the Late Jurassic of Germany. Avialans belong to the clade [[Paraves]] within Coelurosauria, which also includes dromaeosaurs and troodontids. The [[Anchiornithidae]] from the Middle-Late Jurassic of Eurasia have frequently suggested to be avialans, but have also alternatively found as a separate lineage of paravians.<ref name="Rauhut-2020">{{Citation |last1=Rauhut |first1=Oliver W. M. |title=The Origin of Birds: Current Consensus, Controversy, and the Occurrence of Feathers |date=2020 |work=The Evolution of Feathers: From Their Origin to the Present |pages=27–45 |editor-last=Foth |editor-first=Christian |url=https://doi.org/10.1007/978-3-030-27223-4_3 |access-date=2021-01-05 |series=Fascinating Life Sciences |place=Cham |publisher=Springer International Publishing |language=en |doi=10.1007/978-3-030-27223-4_3 |isbn=978-3-030-27223-4 |s2cid=216372010 |last2=Foth |first2=Christian |editor2-last=Rauhut |editor2-first=Oliver W. M.}}</ref>
[[File:Heterodontosaurus tucki cast - University of California Museum of Paleontology - Berkeley, CA - DSC04696.JPG|left|thumb|Skeleton of ''[[Heterodontosaurus]],'' a primitive ornithischian from the Early Jurassic of South Africa]]