Fossil of Tyrannosaurus with good preservation excavated and succeeded in restoring "face of Tyrannosaurus" with unprecedented precision

The American research team has uncovered an extremely good fossil with the preserved state of Tyrannosaurus 75 million years ago and restored the "face of Tyrannosaurus" in more detail than ever.

A new tyrannosaur with evidence for anagenesis and crocodile-like facial sensory system: Scientific Reports
https://www.nature.com/articles/srep44942

This Is Our Best Look Yet at a Tyrannosaur's Face
http://news.nationalgeographic.com/2017/03/tyrannosaur-face-touch-dinosaurs-evolution-science/

A research team of Dr. Thomas Kerr at Carthage University in the United States discovered a very preserved fossil of a kind of Tyrannosaurus who lived in the late Cretaceous in the state of Montana, USA, "Daspletosaurus horneri (Daspletosaurus horneri ) "We named it.

Although the "bones" that form the basis of fossils retain their shape without returning to the earth even after a long period of time, in fact the bones do not change at all, while the living beings are muscles, blood vessels, nerves It is said that it is changing shape at all times by receiving stimulation from such as. Therefore, by examining the condition of the bone, it is possible to reproduce muscles and the like that covered the bones, and the fossil of Daspressosaurus Hornelli discovered this time was extremely good in preservation, so it is alive The research team says that it was able to restore the shape of the face at the time it was as precisely as possible.


A face of Duspetosaurus Hornelli, a kind of Tyrannosaurus reproduced by Dr. Cars, looks like this.


In this study, we not only restored the shape of the face of Daspressosaurus · hornli, but also found a lot of holes in the skull and structurally resembled the crocodile's skull. The alligator's skin has a very thin structure called "Integumentary Sensory Organ", and it is known that it is sensitively used for hunting by perceiving the surrounding situation. Dr. Cars believes that the skulls of crocodiles and Daspressosaurus hornelli are very similar, so that the cheeks of Daspressosaurus Hornelli may have been covered with scaly hull sensory organs.

·bonus
Apart from Dr. Cars, research has also been announced that overturns the established theory that "Tyrannosaurus was actually the same dinosaur as Triceratops."

A new hypothesis of dinosaur relationships and early dinosaur evolution: Nature: Nature Research
https://www.nature.com/nature/journal/v543/n7646/full/nature21700.html

【Fossils】 New hypothesis shaking the dinosaur phylogenetic tree tremendously | Nature | Nature Research
http://www.natureasia.com/ja-jp/research/highlight/11754

Up to now, dinosaurs have been classified into two species, "bird-eyed eyes" featuring bird-shaped pelvis and "dragon eyes" having pelvic lips similar to reptiles. In other words, there were species close to birds and species closest to reptiles. For example, a typical dinosaur Tyrannosaurus is thought to be a crown eye, Triceratops and Stegosaurus are birds eyes.

However, Dr. Matthew Baron's research team found out a new taxonomic group with common features as a result of examining various dinosaurs and analyzing 457 characteristics. According to this new taxon group, Tyrannosaurus is classified as a species close to the birds eye of Triceratops and Stegosaurus.