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| Why was this dinosaur named "bird" billions of years ago? |
Xinhua News Agency, Shenyang, November 29th, title: Why was this dinosaur named "bird" billions of years ago?
Xinhua News Agency reporters Zhao Hongnan and Wu Jiangmin
In the Fossil Bird National Geological Park in Longcheng District, Chaoyang City, Liaoning Province, there is a fossil named "Chinese Dragon Bird" stored
.
However, this fossil called "bird" is not a bird, but a dinosaur that lived billions of years ago
This Chinese dragon bird fossil is about 70 cm long and 50 cm wide.
The animal on the fossil is like a small dinosaur and a bird preparing to fly
.
It has a low and long skull, a very small head, short and strong forelimbs, long hind limbs and tail, and serrated teeth
"When this Chinese dragon bird fossil was first discovered, it was once considered by experts to be a primitive bird
.
" said Lei Guangzhen, a cultural research scholar in Chaoyang City, Liaoning Province.
The most eye-catching thing about the Chinese dragon bird is the silky fluff all over the body, which is one of the reasons why it was originally named the "Chinese dragon bird"
.
However, as more and more non-avian dinosaurs with "feathers" are discovered, "feathers" obviously cannot be used as a basis for distinguishing between birds and non-avian dinosaurs
Paleontologists also discussed the function of the hair-like epidermis on the Chinese dragon bird.
Some people think it may be a kind of “decoration” that indicates gender; others think it is a kind of thermal insulation device, and According to this inference, the hair-like epidermis on the Chinese dragon bird indicates that the small dinosaur may be a warm-blooded animal, that is, a warm-blooded animal
.
"Before 1996, the restored dinosaurs in museums and popular science books generally had only scales, because people did not find the transition form from scales to feathers, or feathers, on dinosaur fossils
.
" Lei Guangzhen said, it can be said that the Chinese belt" The discovery of "feather" dinosaur fossils has strongly promoted the study of the origin of birds
