New species of dinosaur displayed in Buenos Aires
27 June 2012 Last updated at 15:14 BST
A new species of dinosaur is on display at the Museum of Natural Science in Buenos Aires.
Palaeontologists say that it is the most primitive species found so far that provides a link to modern-day birds.
Named Bicentenaria argentina, the species measures between 2.5 and 3 metres and was slim and agile.
The 130 bones were discovered in Rio Negro in Argentina's Patagonia region and are thought to be approximately 90 million years old.
Deborah Basckin reports.