Titled "A new small-bodied ornithopod (Dinosauria, Ornithischia
) from a deep, high-energy Early Cretaceous river of the Australian6Antarctic rift system," the (https://peerj.com/articles/4113) open-access paper appeared online in the journal PeerJ.
In 1888, it was decided by Harry Seeley, a well known paleontologist, that dinosaurs should be divided into two major groups based on the shape of their hips- the bird-hipped (Ornithischia
) and the lizard-hipped (Saurischia).
(2014): A new dryosaurid ornithopod (Dinosauria, Ornithischia
) from the Late Jurassic of Portugal.
However, these resemblances are plesiomorphic in nature (Sereno 1991), and the teeth from the Scots Bay Member cannot be identified more precisely than Ornithischia
. Some postcranial bones originally assigned to ornithischian dinosaurs on their specimen labels, such as vertebral centra (YPM VP 008693a, b) and possible rib fragments (YPM VP 008694, VP 008695), show no features supporting such an identification.
Basal ornithopod (Dinosauria: Ornithischia
) teeth from the Prince Creek Formation (early Maastrichtian) of Alaska.
Paleobiogeography of the Hadrosaurs (Dinosauria: Ornithischia
Here is some background information on the Chinese dinosaurs, who, like other dinos, belong to two orders: Ornithischia
(bird-hipped), which were four-legged plant-eaters and Saurischia (lizard-hipped), which included two-legged meat-eaters (theropods) and four-legged plant-eaters (sauropods).
According to an Argentine press release, the 70-million-year-old fossil fragments belonged to a small, armored herbivore of the order Ornithischia
. The fossil shows that Antarctica was warmer when the animal lived than it is today, according to the Argentine scientists.
Although the Chilesaurus was originally classified as a type of theropod, the scientists are now saying that it is "the earliest diverging member of Ornithischia
" and in that position, in the other major group of dinosaurs, it might help the experts understand how its kind evolved.