The partial skeleton of a new species of turkey-sized herbivorous dinosaur has been discovered in 113 million year old rocks in southeastern Australia. As reported in open access journal PeerJ, the fossilized tail and foot bones give new insight into the diversity of the small, bipedal herbivorous dinosaurs called ornithopods that roamed the great rift valley that once existed between Australia and Antarctica. The new dinosaur has been named Diluvicursor pickeringi, which means Pickering's Flood-Running dinosaur.
Artist's impression of two Diluvicursor pickeringi foraging on the bank of a high-energy river within the Australian-Antarctic rift valley [Credit: Peter Trusler] |
"Diluvicursor shows for the first time that there were at least two distinct body-types among closely related ornithopods in this part of Australia," Dr Matt Herne, lead author of the new study said.
"One was lightly built with an extraordinarily long tail, while the other, Diluvicursor, was more solidly built, with a far shorter tail. Our preliminary reconstruction of the tail musculature of Diluvicursor suggests this dinosaur was a good runner, with powerful leg retracting muscles," Dr Herne said.
The species name honors the late David Pickering, who was Museums Victoria's Collection Manager, Vertebrate Palaeontology. David contributed significantly to Australian paleontology in the lab and field, and tirelessly assisted countless students of paleontology and researchers to achieve their goals. Sadly, David passed away just over a year ago on Christmas Eve 2016.
The site of Eric the Red West has additional importance as it helps build a picture the ancient rift valley ecosystem. Fossil vertebrate remains at this site were buried in deep scours at the base of a powerful river, along with flood-transported tree stumps, logs and branches.
The late David Pickering on the coastal shore-platform near the fossil vertebrate locality of Eric the Red West, where Diluvicursor pickeringi was discovered [Credit: Matt Herne] |
"Much of the fossil vertebrate material from Eric the Red West has yet to be described, so further dinosaurs and other exciting animals from this site are now anticipated."
Source: PeerJ [January 11, 2018]