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What is T. rex? Tyrannosaurus rex, or T. rex, whose name means “tyrant lizard king,” is a species of theropod dinosaur that lived in North America at the end of the Cretaceous Period, between about 68 and 66 million years before present (mybp).
- Tyrannosaurs
- Evolutionary History of The Tyrannosaurs
- Baysian Analysis and Parsimony Analysis – Basically Produce The Same Result
- Filling in The Gaps in The Fossil Record
- Where Are The Three Gaps?
- Xiongguanlong Baimoensisa
The Phylogenetic Analysis of the Tyrannosauroidea Picture credit: Scientific Reports with additional annotation by Everything Dinosaur
More than half of all the tyrannosaurs known to science have been identified in the last ten years or so. Everything Dinosaur has reported on many of these exciting discoveries within this blog for example, in 2011 we featured the discovery of Zhuchengtyrannus and in 2013 we discussed the implications of the discovery of Lythronax from western Nort...
The diagram above illustrates the result of the parsimonious study. The Baysian analysis produced a very similar result. These two techniques reinforce the conclusions made by each. In the scientific paper, the scientists argue that these methods provide a robust framework for interpreting the evolutionary history of the tyrannosaur family. They co...
In addition, to providing an in-depth study of the existing fossil record, the paper’s authors reaffirm a fundamental problem restricting our understanding of the evolution of the most famous dinosaurs of all. There are three distinct gaps in the Tyrannosauroidea fossil record. If these three, very significant gaps get filled as more fossils are fo...
Oh for more from Appalachia! Despite the wealth of tyrannosaur fossil material recovered from the land mass to the west of the Western Interior Seaway (Laramidia), very little is known about the tyrannosaurs that roamed the much larger landmass of Appalachia that lay to the east of this seaway. Only two taxa have been described to date – Dryptosaur...
Xiongguanlong baimoensisa was a lightly-built, agile predator some five metres in length. Its fossils are known from northern China (Gansu Province) but the strata from which the fossil material comes from has proved to be exceptionally difficult to date. The model pictured above is from the: CollectA Prehistoric World Models. Thirdly, current thin...
Diagram illustrating arm anatomy. Another possibility is that the forelimbs held struggling prey while it was killed by the tyrannosaur's enormous jaws. This hypothesis may be supported by biomechanical analysis.
Feb 2, 2016 · Our phylogenies illustrate that the body plan of the colossal species evolved piecemeal, imply no clear division between northern and southern species in western North America as had been argued...
- Stephen L. Brusatte, Thomas D. Carr
- 2016
This rare adult book on T. rex tells the true story of the famous Tyrannosaur "Sue," unfolding like a movie plot. It covers Sue's discovery and the battle over the fossil, engaging commercial fossil hunters, corporate giants, museums, law enforcement, government prosecutors, and a Native American tribe.
Sep 17, 2010 · Progressively more derived tyrannosaurs form a pectinate series on the line toward Tyrannosauridae, the subclade of multi-ton, deep-skulled behemoths from the terminal Cretaceous (Campanian-Maastrichtian), including Tyrannosaurus, Tarbosaurus, Albertosaurus, and close relatives .
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Feb 6, 2019 · Our results reveal that the tyrannosaur has the most modular skull organization among the amniotes included in our study, with an unexpected separation of the snout in upper and lower sub-modules...
