Eric Walker added Elephas americanum and 'Sistine Chapel of the ancients' rock art discovered in remote Amazon forest | Archaeology | The Guardian to Mastodon, and added Mastodon to Mammutidae

Eric Walker added Mastodon to Mammutidae, and added Mammutidae to Proboscidea

Eric Walker added Elephantidae and Mammutidae to Proboscidea, and added Proboscidea to Mammalia