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Some researchers have been skeptical and argued that the forelimbs of tyrannosaurids were still very small for their body size, and would therefore have been usuitable to grasp large prey. Absence of healed pathologies (i.e. fractures, breakage) have been seen as evidence that the forelimbs would not
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holotype fossil (CMN 2120) by
Lawrence Lambe in 1914 and 2017, with Barnum Brown shortly after describing tyrannosaurids as animals in which "the short, reduced frontlegs could have been used only in grasping prey". The idea, however, did not get serious attention until late 1980s/early 1990s, when
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Lambe L.M. (1914). "On the forelimb of a carnivorous dinosaur from the Belly River
Formation of Alberta, and a new genus of ceratopsia from the same horizon, with remarks on the integument of some Cretaceous herbivorous dinosaur".
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have been used very much, while signs of healed pathologies have been used both as evidence that they could not have been necessary (as the animals apparently could survive with broken arms) and that they served some function.
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Some researchers propose that the forelimbs in juvenile tyrannosaurids were longer relative to body size – and possibly more useful – than in their adult counterparts, but were “outgrown” by the rest of the body as they got
436:– You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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used their forelimbs to handle prey before the rest of their bodies "outgrew" the arms and the heads with jaws became powerful enough to take over as their main and/or sole weapon.
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were discovered and began to be studied by
Carpenter and Smith, who noted that the musculature would have been well developed. Such research have continued for decades.
202:(2011). "A new subadult tyrannosaurus rex and a reassessment of ontogenetic and phylogenetic changes in tyrannosauroid forelimb proportions".
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This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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Brown B (1919). "Hunting Big Game of Other Days: A Boating
Expedition in Search of Fossils in Alberta, Canada".
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Restoration of a young tyrannosaurid (primarliy based on the specimen BMRP 2002.4.1, aka. "Jane" (attributed to
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If the file has been modified from its original state, some details may not fully reflect the modified file.
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I, the copyright holder of this work, hereby publish it under the following license:
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152:)) surprise and bring push down prey, an ornithomimid (mostly based on
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Click on a date/time to view the file as it appeared at that time.
301:"Hail the Lizard King. T. Rex's Puny Arms Were Useful After All"
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The first complete tyrannosaurid forelimbs were described in
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Juvenile tyrannosaurid attacks its prey (an ornithomimosaur)
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Creative
Commons Attribution-ShareAlike 4.0 International
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Lambe L.M. (1917). "The
Cretaceous theropodous dinosaur
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Geological
Society of America Abstracts with Programs
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114:You can help
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22:File history
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327:LiveScience
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242:Gorgosaurus
209:(1): p. 120
198:Williams S
165:Gorgosaurus
136:Description
940:118.11 dpc
932:118.11 dpc
901:File usage
828:Dimensions
780:media type
570:some value
329:14-10-2016
317:Pappas S.
307:18-10-2018
299:Geggel L.
185:References
27:File usage
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825:Thumbnail
822:Date/Time
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251:: p. 1-85
227:(10): p.
145:English:
80:image/png
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180:larger.
128:Summary
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358:Author
348:Source
321:T. Rex
200:et.al.
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602:Conty
588:Conty
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268:: p.
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338:Date
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