Platybelodon

An elephant-like mammal from the Miocene era. The animals had large shovel-like tusks on its lower jaw. They also had pointed tusks on the upper jaw, and a developing trunk. Scientists think they used the lower tusks to scoop up vegetation and roots from wetlands and swamps. They may even have lived in  grassy savannah regions using the tusks as scythes. It is thought that male adults consumed rougher, harder materials, using the upper and lower tusks to cut and chop branches /shrubbery. It has also been thought that the upper and lower tusks also served in defense. It is not really known if there were specific animals that preyed upon them.They appeared to be social animals, living in small herds. They were roughly 10 feet long, 9 feet tall and weighed around 2 tons

The reason for their extinction is not really known. The general belief is that weather conditions may have caused droughts, destroying their feeding grounds.

In 1920, fossils of the Platybelodon were discovered. Most fossils of Platybelodon have been found in China.

source: https://www.extinctanimals.org/platybelodon.htm

https://www.newdinosaurs.com/platybelodon/