Sentences with phrase «of ornithischian»
A March 2017 analysis of a longer list of ornithischian species concluded that ornithischians and theropods are closely related.
https://www.sciencenews.org/ Not exact matches
This new analysis of dinosaurs and their near relatives, published today in the journal Nature, concludes that the ornithischians need to be grouped with the theropods, to the exclusion of the sauropodomorphs.
However, the re-grouping of dinosaurs proposed in this study shows that both ornithischians AND theropods had the potential to evolve a bird - like hip arrangement - they just did so at different times in their history.
The ornithischians and saurischians were at first thought to be unrelated, each having a different set of ancestors, but later study showed that they all evolved from a single common ancestor.
However, since 2002 paleontologists have unearthed a couple of other ornithischians with primitive bristle or furlike feathers.
«This research provides the clearest evidence to date that feathers were present within the ornithischian half of the dinosaur family tree,» says Ryan McKellar of the Royal Saskatchewan Museum in Regina, Canada.
Their data set had many more ornithischians — the group that includes Stegosaurus and Triceratops — than other such analyses; one of the conclusions of that study was that theropods and ornithischians were more closely related than once thought.
On the other side of the divide, «bird - hipped» ornithischians included beaked plant - eaters such as Triceratops.
The herbivorous ornithischians were a really diverse bunch, with a spectacular array of frills and armors and horns and crests.
We knew that some of the plant - eating ornithischian dinosaurs had simple bristles, and we couldn't be sure whether these were the same kinds of structures as bird and theropod feathers.
Harry Seeley, a British paleontologist, first proposed the split of saurischians and ornithischians back in 1887, with the classifications based on the shape of the hips of the dinosaurs.
Their analysis resulted in moving theropods from Saurischia and into a class of bird - limbed dinosaurs now known as Ornithoscelida (which formerly contained ornithischians like Triceratops).
«In the 130 years since the ornithischian group was first recognised, we have never had any concept of how the first ones could have looked until now.»
A second line of so - called bird - hipped, or ornithischian dinosaurs, led to a widely differing group of animals that included the stegosaurs and duckbilled dinosaurs.