An ancient elephant with a long nose.

The ancestors who appeared in the late Eocene, like Moeritherium, are generally considered to be ancestors with long noses, with clumsy bodies, the size of pigs and flat toes. There is neither a long nose nor a long ivory, but the upper lip is slightly larger, and the second pair of front teeth of the upper and lower jaws are slightly larger. Archaeopteryx fossils were found in Africa, but by 20 12, many paleontologists believed that another archaeopteryx found in Africa was the true ancestor of elephants. Platybelodon appeared in Miocene, and its fossils were found in Asia, North America, Europe and Africa. It is a very specialized lateral branch of the elephant, with an extremely slender mandible and a pair of flat lower incisors at the front end, which looks like a big shovel, hence the name. Living by rivers and lakes, I cut off plants in shallow water with shovel teeth and shovel them up, and then push food into my mouth with my long nose. There are three types of shovel tooth images: plate tooth images, shovel tooth images and saw shovel tooth images. The shovel plate is short and wide, and the upper incisors are shorter than the shovel plate, while the shovel plate of the shovel tooth image is long and narrow, and the upper incisors are longer than the lower incisors. The first complete platypus skeleton in the world was found in Tongxin County, Ningxia, China. Mammoth mammoth (Mammuthus) is a genus of Elephantidae. It once lived in the cold regions of northern Asia, Europe and northern North America in the late Pleistocene, and died out mysteriously about 5,000 years ago. In the frozen soil of northern Siberia in the Soviet Union and alaska peninsula in North America, complete individuals with skin and flesh have been found, and the plants in the frozen soil grown locally are still preserved in the stomach. It is 5 meters long and 3 meters high, which is similar to Asian elephants. Keep long hair; The front teeth are about 1.5 meters long, and strongly bend upward and backward in a spiral shape; The skull is short, the crest is very high, the upper and lower foreheads and alveoli are deep, and the molars are closely arranged with a large number. The third molar can have as many as 30 dental plates. It used to be an important hunting object for human beings in the Stone Age. Saber-toothed elephant is an extinct genus of Saber-toothed subfamily of Ceratoptera. The skull is slightly longer than the real one, the legs are also long, and the ivory of the upper jaw is long and big, bending upward; The jaw is short and there is no ivory; The crown of buccal teeth is low, and the number of ridges with roof-shaped cross section is increasing gradually; In the advanced saber-toothed elephant, the number of ridges of the third molar is as high as 10. The earliest saber-toothed elephant appeared in the late Miocene and could survive until the late Pleistocene at the latest. Its geographical distribution is limited to Asia and Africa. The famous scientific name of "Yellow River Elephant" in primary school textbooks is saber-toothed elephant zdanskyi, which is widely distributed. The fossils found in Gansu are the longest and best preserved stegodon fossils found in the world.