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| Thescelosaurus neglectus v Acheroraptor temertyorum | |
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| Tweet Topic Started: Jan 13 2018, 10:33 PM (344 Views) | |
| Taipan | Jan 13 2018, 10:33 PM Post #1 |
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Thescelosaurus neglectus Thescelosaurus was a genus of small ornithopod dinosaur that appeared at the very end of the Late Cretaceous period in North America. It was a member of the last dinosaurian fauna before the Cretaceous–Paleogene extinction event around 66 million years ago. The preservation and completeness of many of its specimens indicate that it may have preferred to live near streams. This bipedal ornithopod is known from several partial skeletons and skulls that indicate it grew to between 2.5 and 4.0 meters (8.2 to 13.1 ft) in length on average. It had sturdy hind limbs, small wide hands, and a head with an elongate pointed snout. The form of the teeth and jaws suggest a primarily herbivorous animal. Overall, the skeletal anatomy of this genus is well documented, and restorations have been published in several papers, including skeletal restorations and models. The skeleton is known well enough that a detailed reconstruction of the hip and hindlimb muscles has been made. The animal's size has been estimated in the 2.5–4.0 m range for length (8.2–13.1 ft) for various specimens, and a weight of 90 kilograms (200 pounds). Some sources claim a weight up to or over 200 kg! ![]() Acheroraptor temertyorum Acheroraptor is an extinct genus of dromaeosaurid theropod dinosaur known from the latest Maastrichtian Hell Creek Formation of Montana, United States. It contains a single species, Acheroraptor temertyorum. A. temertyorum is one of the two geologically youngest known species of dromaeosaurids, the other being Dakotaraptor, which is also known from Hell Creek. Phylogenetic analysis suggests Acheroraptor is a velociraptorine that is more closely related to Asian dromaeosaurids, including Tsaagan and Velociraptor, than it is to Dromaeosaurus, Saurornitholestes, or any other taxon from North America. The creature measured about 3 m in length and weighed in at about 40 kg. It had a long-snouted skull, dagger-like ridged teeth and was likely covered in feathers. ![]()
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| Palaeoscincus | Jan 15 2018, 09:05 AM Post #2 |
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Heterotrophic Organism
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Not sure where the 500-600 lbs Thecelosaurus neglectus weight comes from/ I've seen one source that lists the weight of Thescelosaurus at 200 lbs My Webpage I think a 200-300 lb Thescelosaurus is within the range of prey for an individual 40 kg dromaeosaur. I'm sure the dromaeosaur like many of today's predators could bring down much larger prey, especially something like this ornithopod which unless someone can mount a case for it, doesn't have much to defend itself. Even armored scutes that were once associated with Thescelosaurus probably dont belong to it, so it doesnt have much defense outside of size, which unless its at the hight end 600 lb estimate. isn't enough. Even at the large estimate I think Acheroraptor could still pull it off. Edited by Palaeoscincus, Jan 15 2018, 09:16 AM.
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| Taipan | Jan 15 2018, 02:22 PM Post #3 |
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This matchup probably depends on what weight estimate you accept. The smaller weight range for Thescelosaurus gives Acheroraptor a chance, the higher weight estimates favour Thescelosaurus. |
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