From The early twentieth century, the taxonomy of extinct elephants was sophisticated. In 1942, American palaeontologist Henry Fairfield Osborn's posthumous monograph about the Proboscidea was released, whereby he applied numerous taxon names that had Earlier been proposed for mammoth species, like replacing Mammuthus with Mammonteus, as he thought the former https://www.youtube.com/channel/UCCoZfLHRsYsRsVHqS-CSAWA