What is Eoraptor?
{{italictitle}} {{speciesbox |taxon=| authority = Sereno ''et al.'', 1993 | fossil_range = [[Late Triassic]]<br>~{{fossil range|231|228}} | image = Royal Ontario Museum Eoraptor.JPG | image_upright = 1.1 | image_caption = Reconstructed skeleton, Royal Ontario Museum | parent_authority = [[Paul Sereno|Sereno]] ''et al.'', 1993 | display_parents = 2 | genus= Eoraptor | species = lunensis }} '''''Eoraptor''''' is one of the earliest known [[theropod]] [[dinosaur]]s. It was a very small [[omnivore]] or [[carnivore]] which lived in the [[Lower Triassic]], about 231-228 million years ago (mya).<ref name=Apaldetti>{{cite journal | last = Apaldetti C ''et al'' 2011. A new basal Sauropodomorph (Dinosauria: Saurischia) from Quebrada del Barro Formation (Marayes-El Carrizal Basin), Northwestern Argentina | title = A new basal sauropodomorph (Dinosauria: Saurischia) from Quebrada del Barro Formation (Marayes-El Carrizal Basin), northwestern Argentina| url = | journal = PLOS ONE | year = 2011| volume = 6 | issue = 11| page = e26964 | doi = 10.1371/journal.pone.0026964 | pmid = 22096511| pmc = 3212523| doi-access = free}}</ref><ref name=Alco>{{cite journal |last=Alcober Oscar A. & Martinez, Ricardo N. 2010. A new herrerasaurid (Dinosauria, Archosauria, Saurischia) from the Upper Triassic Ischigualasto Formation of northwestern Argentina |title=A new herrerasaurid (Dinosauria, Saurischia) from the Upper Triassic Ischigualasto Formation of northwestern Argentina |journal=ZooKeys |year=2010 |pages=55–81 |doi=10.3897/zookeys.63.550 |pmid=21594020 |issue=63 |pmc=3088398|doi-access=free }} [https://www.pensoft.net/inc/journals/download.php?fileId=1401&fileTable=J_GALLEYS]</ref> It is the only one of the possible early dinosaurs which can be exactly [[Radiometric dating|dated]] by a layer of [[volcanic ash]] close beneath the fossil.<ref name=Alco/> ''Eoraptor'' was a small, lightly-built archosaur that walked on two long legs. It was about {{convert|1|m|ft|abbr=on}} it had light, hollow bones, a long head with dozens of small, sh