Ridge-toothed ancient mammal, similar to mastodon (9)?

Question

s - - - o - - - -

Answer 1

Stegodont

and you have not received a correct answer because anthropology is the study of people, this is zoology

Answer 2

smilodont?

Answer 3

I think you are talking about palaeomastodon, or possibly  

gomphotherium.

Answer 4

Actually this is paleontology, not just zoology, but it may apply to anthropology because of the possibility of the existance of Stegodons contemporaneous with ancient humans.