There is a breed of deer in India,I believe, that has "tusks" similar to what you describe. I can't remember the breed but have seen pictures of them. I suggest you contact the wildlife biologist in your area and ask him what he knows about "throwbacks" to deer of another era.

Coastie
"Children are tastier than Dogs or Goats and they're far easier for a Leopard to catch" Indian Magistrate Hari Prasad Tivari