article_snippet.sent: These features are more like those seen on long-neck dinosaurs.
article_snippet.sent: However, more than a dozen specimens have now been excavated, including four skeletons, which demonstrate that the dinosaur combined a variety of unique anatomical traits.
article_snippet.sent: Unusual: Fossils dating from the Late Jurassic Period, around 145 million years ago, reveal an unusual combination of features from various dinosaur groups, including relatively short arms, a long neck, small head and leaf-shaped teeth (pictured)
article_snippet.sent: Chilesaurus has leaf-shaped teeth, similar to those of primitive long-neck dinosaurs.
article_snippet.sent: For example, Chilesaurus leaf-shaped teeth are similar to those of primitive long-neck dinosaurs because those of primitive long-neck dinosaurs were selected over millions of years as a result of a similar diet between these two lineages of dinosaurs. '
article_snippet.sent: Researchers examined over 1,500 anatomical traits of dinosaurs to reconstruct Researchers family tree.
article_snippet.sent: Researchers used mathematical modelling to trace evolving adaptions and changing body size over time and across dinosaur branches.
highlights_snippet.sent: Fossils reveal unusual features from various dinosaur groups, including short arms, a long neck, small head and leaf-shaped teeth .
  