给定一篇英文文章，生成一份摘要，其中包含前几个句子，其中70%的主要信息都被保留。 
原文：Scientists have discovered a new species of dinosaur in Argentina, tracing its origins to Africa via Antarctica. The remains of the critter are the first fossils of a dinosaur to have been found on the continent in more than 20 years. The dinosaur has been named Bagualia alba, which means "white cowboy" in the language of the indigenous Mapuche people from the region, in reference to the rugged terrain where the bones were discovered.
A new dinosaur species has been found in Argentina, with its origins traced from Africa via Antarctica. The fossils of Bagualia alba, which means "white cowboy" in the language of the indigenous Mapuche people, were discovered in a rugged terrain, marking the first discovery of a dinosaur on the continent in over 20 years.