Daspletosaurus torosus steveoc


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Daspletosaurus torosus life restoration,

• Based proportionally on a Gregory Paul skeletal reconstruction in Tyrannosaurus Rex, the Tyrant King by Peter Larson and Kenneth Carpenter (2008).[1]
• It's not clear whether derived tyrannosaurs would have been covered in scales or feathers or a combanation of both. A few small skin impressions have been known for tyrannosaurids which show lightly Pebbled skin; these are small, averaging 2.4mm.[2] Skin impressions from the closley related Gorgosaurus are reported to show both smooth, naked skin and scales.[3][4] A 2017 study looked at a variety of tyranosaurid skin impressions and came to the conclusion that derived tyrannosaurs were probably scaly over most their body. [5] Another study in 2017 suggests that there may have been large, flat Crocodile-like skin cracks/scales on the front of the snout of Tyrannosaurs. [6]
What complicates the issue is that most coelurosaur fossils show feathers covering thier bodies and inference would suggest the same for tyrannosaurs. The smaller basal tyrannosauriod Dilong and the larger tyrannosauroid Yutyrannus also preserve feather impressions. This raises the probability that, derived tyrannosaurs had a mix of feathers and scales on different parts of the body or that feathers were lost as individuals reach maturity [7][8]
• The muscles are based on a diagram by Scott Hartman [1] with some details from [9].
• The colours and patterns, as with nearly all reconstructions of prehistoric creatures, are speculative.

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References

  1. Paul, Gregory S. (2008) „The extreme lifestyles and habits of the gigantic tyrannosaurid superpredators of the Late Cretaceous of North America and Asia“ in Tyrannosaurus rex, the Tyrant King (Life of the Past), Bloomington: Indiana University Press, S. 316 ISBN: 0-253-35087-5.
  2. Currie, Philip; Badamgarav, Demchig; Koppelhus, Eva. (2003). "'The First Late Cretaceous Footprints from the Nemegt Locality in the Gobi of Mongolia'" (PDF). Ichnos 10 (1): 1-13. Archived from the original on 2009-07-20. Retrieved on 2009-11-11.
  3. Currie, P. (2001). 2001 A. Watson Armour Symposium: The Paleobiology and Phylogenetics of Large Theropods. Field Museum of Natural History, Chicago.
  4. Carpenter, Kenneth (1997) „Tyrannosauridae“ in Currie, Philip J. & Padian, Kevin (eds.). (Hrsg.) Encyclopedia of Dinosaurs, San Diego: Academic Press, S. 768 ISBN: 0-12-226810-5.
  5. Bell, P R., et al (2017). "Tyrannosauroid integument reveals conflicting patterns of gigantism and feather evolution". Biology Letters. DOI:10.1098/rsbl.2017.0092.
  6. (2017). "A new tyrannosaur with evidence for anagenesis and crocodile-like facial sensory system". Scientific Reports 7: 44942. DOI:10.1038/srep44942.
  7. Xu, X., Norell, M. A., Kuang, X., Wang, X., Zhao, Q., Jia, C. (2004). "Basal tyrannosauroids from China and evidence for protofeathers in tyrannosauroids". Nature 431: 680–684. DOI:10.1038/nature02855.
  8. (2012). "A gigantic feathered dinosaur from the Lower Cretaceous of China" (PDF). Nature 484: 92–95. DOI:10.1038/nature10906. PMID 22481363.
  9. Persons, Scott; Currie, Philip. (2010). "'The Tail of Tyrannosaurus: Reassessing the Size and Locomotive Importance of the M. caudofemoralis in Non-Avian Theropods'". The Anatomical Record 294: 119-131.
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Originally from en.wikipedia; description page is/was here.
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Daspletosaurus war ein theropoder Dinosaurier aus der Familie der Tyrannosauridae, der vor ungefähr 80 bis 72 Millionen Jahren während der Oberkreide (Campanium) im westlichen Nordamerika lebte. Die Typusart Daspletosaurus torosus wurde in Alberta (Kanada) entdeckt; zwei weitere Arten, Daspletosaurus horneri und Daspletosaurus wilsoni, wurden in Montana gefunden. Eine vierte Art aus Alberta wartet noch auf eine Beschreibung. .. weiterlesen