The cladogram below results from analysis by Herne et al., 2019, which added Changchunsaurus and Haya to Jeholosauridae, but moved Yueosaurus to the sister family Thescelosauridae. The Jeholosauridae includes the type genus Jeholosaurus, and also possibly Yueosaurus, Changchunsaurus, and Haya. Vector illustration of Iguanodon from genus of ornithopod dinosaur isolated on white background. The jeholosaurids were defined as all neornithischians more closely related to Jeholosaurus shangyuanensis than to Hypsilophodon foxii, Iguanodon bernissartensis, Protoceratops andrewsi, Pachycephalosaurus wyomingensis, or. The jeholosaurids were defined as all neornithischians more closely related to Jeholosaurus shangyuanensis than to Hypsilophodon foxii, Iguanodon bernissartensis, Protoceratops andrewsi, Pachycephalosaurus wyomingensis, or Thescelosaurus neglectus. Jeholosauridae was a group of herbivorous neornithischian dinosaurs from the Cretaceous Period (Aptian - Cenomanian).The family was first proposed by Han et al. The family was first proposed by Han et al. Collectively, the ornithopod remains comprise three dorsal vertebrae, two sacral centra, three distal caudal centra, both proximal femora, left tibia, and several other elements all presumably from a single individual, they said. Gondwana Research, published online Februdoi: 10.1016/j.gr.2022.01.Jeholosauridae was a group of herbivorous neornithischian dinosaurs from the Cretaceous Period ( Aptian - Cenomanian). Abdominal contents reveal Cretaceous crocodyliforms ate dinosaurs. ![]() The findings were published in the journal Gondwana Research. “Given the lack of comparable global specimens, this prehistoric crocodile and its last meal will continue to provide clues to the relationships and behaviors of animals that inhabited Australia millions of years ago.” “It is likely dinosaurs constituted an important resource in the Cretaceous ecological food web.” “The find suggests dinosaurs were intrinsically part of the Cretaceous ecology as scavengers, predators and prey,” he added. “While Confractosuchus sauroktonos would not have specialized in eating dinosaurs, it would not have overlooked an easy meal, such as the young ornithopod remains found in its stomach,” Dr. ![]() Yet, despite its last meal, the crocodile was likely not a dinosaur specialist. The dinosaur’s estimated body mass (1.0-1.7 kg) falls well within the size range for expected prey of Confractosuchus sauroktonos, which has an estimated body length of 2.5 m (8.2 feet) based on the preserved elements. “These gut contents oddly represent the first recorded skeletal remains of ornithopods from the Winton Formation and may represent a new species.”ĭigital dissection of Confractosuchus sauroktonos in (a) dorsal aspect (c) ventral aspect (c) left lateral aspect (d) close-up of pectoral region with ventral osteoderms removed (in ventral aspect) (e) abdominal contents showing ornithopod remains. “Collectively, the ornithopod remains comprise three dorsal vertebrae, two sacral centra, three distal caudal centra, both proximal femora, left tibia, and several other elements all presumably from a single individual,” they said. The researchers also found the partly digested remains of a juvenile ornithopod dinosaur in the crocodile’s stomach. “The other, Isisfordia duncani, comprises multiple semi-articulated and partially complete skeletons.” It consists of dentaries, teeth, a braincase. It has been suggested to be a secondary Morrosaurus, but no material overlaps, so this can not be tested. Biscoveosaurus is known from the Late Maastrichtian-aged Snow Hill Island Formation, Cape Lamb Member, James Ross Island, Antarctica. Matt White, a paleontologist with the Australian Age of Dinosaurs Museum of Natural History and the Palaeoscience Research Centre at the University of New England, and his colleagues. Biscoveosaurus is a naked genus of ornithopod dinosaur that lived in Antarctica during the Late Cretaceous. “ Confractosuchus sauroktonos represents only the second crocodyliform discovered from the Winton Formation,” said Dr. The animal’s fossilized remains - a near-complete skull with dentition and postcranial skeleton missing the tail and hind limbs - were discovered on Elderslie Station, near the north western margins of the Winton Formation, in 2010. It belonged to Eusuchia (literally, true crocodiles), a clade that includes living crocodilians and their closest relatives. They were herbivores herbivores, as can be judged by studies conducted by palaeontologists. ![]() Image credit: Julius Csotonyi / White et al., doi: 10.1016/j.gr.2022.01.016.Ĭonfractosuchus sauroktonos lived in what is now Queensland, Australia, some 95 million years ago (Cenomanian stage of the Late Cretaceous epoch). The Ornithopods were some of the most successful dinosaurs during their time living out from the Middle Jurassic all the way to the end of the Cretaceous. An artist’s impression of Confractosuchus sauroktonos attacking an ornithopod dinosaur.
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