Dinosaur weight: 3 tons
Dinosaur food: low ferns and other plants
Survival:
Age of existence: Late Cretaceous
Place of residence: Canada; United States of America
Determine the key points:
There is a heavy bone hammer at the end of the tail.
Llambi, 19 10+00), a genus of Ankylosauridae, also known as Euonymus, is one of the largest dinosaurs in Ankylosauridae, and its body shape is similar to that of a baby elephant. This is also the most complete fossil record of Ankylosaurus, including its spiked armor, low body and huge rod-shaped tail. The ratio of humans to baotoulong. Among Ankylosaurus, only Duozhilong and Ankylosaurus were bigger than Baotou Dragon. Baotou dragon is about 6 meters long and weighs 2 tons. Its body is 2.4 meters wide, its body is low and its limbs are short. The hind limbs are bigger than the forelimbs, and all limbs have claws like hooves. 1996, Ankylosaurus tracks were discovered in Sucre, Bolivia. It is estimated that the moving speed of Baotou Dragon at that time was normal. Its head and skull are flat, thick and triangular like other Ankylosaurus, and there is only a small space for storing the brain. The mouth is a horned beak with weak teeth like nails. Its neck is very short.
Baotou dinosaur's whole head and body are protected by armor belt, but it still maintains some flexibility. This is the first Ankylosaurus found. Its armor can cover the eyes. Each armor belt consists of a thick oval deck embedded in thick skin, and the skin is covered with short thorns (like crocodiles) of only 10- 15 cm. In addition to these horns, there is a big horn behind the skull of Baotou dragon. The clublike tail of Baotou dragon in London Museum of Natural History has a bony stick at the end of the tail. The tail is muscular, and you can wave sticks to both sides for defense at will. Under the heavy armor, many bones are fused together to support. The spine and ribs are fused together, and several spines of the hip are connected together to form a stick. The tail consists of hardened tissue, which is combined with the coccyx. Baotou Dragon lived between 85 million and 65 million years ago, from Kamba Stage to Meister richter Stage in the late Cretaceous. Baotou dragon is a herbivorous dinosaur. Its nose has a complicated structure, so it may have a keen sense of smell. The limbs are flexible and can be used to dig holes. Because of their fragile teeth, they may only eat low plants and shallow tubers. Because all the bones were separated at the time of discovery, it is generally estimated that Ankylosaurus lived alone. However, after 22 groups of painted dragon larvae were found in 1988, it can be seen that Baotou dragon may also be, or at least live in groups during the larval period.
Baotou dragon only had abdomen and no armor. Like a porcupine, if you want to hurt it, you have to do the opposite. The study of dinosaur bones in Alberta, Canada supports this view, showing that hadrosaurs had many bite marks, but Ankylosaurus did not. It is speculated that the extinction of Baotou dragon was due to the powerful jawbone strength of Tyrannosaurus Rex. It is very dangerous to kill baotoulong, because its tail will cause serious damage when it shakes. Lawrence Lambe, a paleontologist, discovered the first specimen of Baotou Dragon (the completed model specimen) in 1902, and named it "Stereocephalosaurus". But this name has been used all the time, so it was renamed as Baotou Dragon at 19 10. This name is misspelled in many cases. It was once thought to be Ankylosaurus.
Type species is a thrush. The second species is the pointed-tailed lizard, which was found in 1924. Although the tail sticks of the two species are different in shape, they may belong to the same species. Some specimens are thought to be Duolong and Ankylosaurus, while others are said to belong to Baotou Dragon.
In Alberta, Canada and Montana, the United States, more than 40 fossils of Paeonodon were found, which is the most abundant Ankylosaurus. These fossils include 15 skulls, teeth and an almost complete skeleton and armor. Especially the tail stick is the most common. The simplified evolutionary branches of Baotou Dragon are as follows:
Avicennia of the genus Avicennia.
Ankylopoda
Ankylosaurus
Nodosauridae's nodosauridae
Ankylosauridae
Oxytropinae
Ankylosaurinae (such as Ankylosaurus and Duolong)