The oldest dinosaur? A Middle Triassic dinosauriform from Tanzania
Sterling J. Nesbitt, Paul M. Barrett, Sarah Werning, Christian A. Sidor and Alan J. Charig
Biol. Lett. 2013 9
http://www.nature.com/news/earliest-known-dino-relative-found-1.11959
http://rsbl.royalsocietypublishing.org/content/9/1/20120949.full.pdf+html
– Jacqueline