The evolution of living things on Earth is not complete smoothly. Some living things may even experience recurrence and degradation. Jurassic dragon hunting provides such an example for everyone. The jurassic hunting fossil unearthed from the famous fossil origin Sohoven is 62 cm long. Its skeletal characteristics show that it is a larva. The jurassic hunting dragon’s skull is pointed and long, the brain is small, the eye sockets are not large, and the upper jaw And the jaw are full of small teeth, and the edges are also jagged, suitable for biting; its forelimbs are short, only one-third of the length of the hind legs, and the tail is quite long, almost the length of the trunk, in It played the role of rudder during the rapid running.
The famous Archaeopteryx fossils have been found in the early Jurassic strata in Solenhofen. We have restored one of the ancestral birds in May 2000. Its color is very bright. The Jurassic Hunter was originally considered to be a jaw. A member of the dragon family, and the feathered Chinese dragon bird and the Chinese beautiful feather dragon are close relatives, but the two places are also far apart, but many of them have similar characteristics. Therefore, according to the current feather evolution model, it is speculated that jurassic dragons should develop simple fibrous feathers, but the fossils do not have traces of feather protection, but maintain clear scaly skin marks on the hind limbs of the tail. This phenomenon Contradictions with scientists’ previous models of feather evolution.
The origin of birds and the evolution of feathers are the focus of scientists’ research. At present, this research area is concentrated in the middle and late Jurassic period. The evidence on the origin of birds in the past few decades mainly comes from the Cretaceous. An event occurred in the late Jurassic, and the middle and late Jurassic was the weakest link in terms of fossil records. It is believed that with the discovery and related research of fossils during this period, it will greatly promote our understanding of the important evolutionary event of the origin of birds.
Therefore, some scientists believe that this indicates that the early evolution of feathers may be more complicated than we know. Perhaps the feathers appeared independently many times; or after they appeared, they were missing and re-evolved into scaly skin; or some species were only in the body. Feathers appear on some parts. All these evolutionary phenomena are possible. Of course, other scientists have put forward their own opinions. For example, because the bones of the jurassic dragon are known to belong to larvae, they may grow feathers when they grow up, or they may lose feathers seasonally, or the specimens themselves are not found. Can save feathers.