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Showing results for tags 'ornithischian'.
Found 8 results
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Excellent paper describing the osteology of the Mongolian ornithischian Haya griva Good reference document for other Hypsilophodontids https://Haya grivadigitallibrary.amnh.org/handle/2246/7253 Troodontid tooth found in matrix. Possibly enjoying dinner
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- mongolia
- late cretaceous
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Stabilized with Butvar B-76; repaired using an unspecified cyanoacrylate. Identified by Dr. Alexander Averianov as a sacral vertebrae of a juvenile Levnesovia transoxiana. The specimen is either from Dzarakuduk or an excavation near the city of Uchkuduk many years back.
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- uchkuduk
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A very informative journal from the Utah Geological Association that focuses on ornithischian dinosaurs from the Morrison Formation which form only about 15% of the dinosaur specimens recovered. What is key for those familar with this assemblage is that this article demonstrates that Nanosaurus agilis is the senior name for Drinker nisti, Othnielosaurus consors, and Othnielia rex. Four valid genera and six species are present: Fruitadens haagaroum, Nanosaurus agilis, Camptosaurus dispar, C. aphanoecetes, Dryosaurus altus, and D. elderae https://
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- ornithischian
- jurassic
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Interesting look at why bipedal Ornithischians reverted to quadrupledality Abstract Ornithischian dinosaurs were primitively bipedal, but reverted to quadrupedality on at least three (and potentially several more) occasions: in Ceratopsia, Thyreophora and Hadrosauriformes. Each of these reversals was accompanied by anatomical changes to the whole skeleton that enabled the forelimb to function in weight bearing and that also resulted in numerous changes to the hip and hind limb musculature. Each quadrupedal clade acquired a suite of similar biomechanical characters, although th
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- ornithischian
- quadrupedality
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Caudal vertebra of an Edmontosaurus annectens. This is a vertebra from somewhere near the end of the tail.
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I have heard that dinosaur bones are different in structure. I have some questions. Are all theropod bones hollow including sauropods? And are all ornithischian bones more solid? And can that be tell from a small fragment of bone?
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From the album: Reptile Fossils
Triceratops horridus Marsh, 1889 Rooted worn tooth of a triceratops. Location: Hell Creek Formation, Carter County, Montana, USA Age: Maastrichtian, Upper Cretaceous© © Olof Moleman
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From the album: Reptile Fossils
Edmontosaurus annectens (Marsh, 1892) Chevron of an Edmontosaurus. Location: Hell Creek Formation, South Dakota, USA Age: Maastrichtian, Upper Cretaceous© © Olof Moleman
