Thanks for the follow up.
"The reason I don't get tusks from them is because tusks are just elongated teeth that actually issue from inside the mouth" True, a tusk by definition is an elongated tooth, however they do not always issue directly from inside the mouth which is the case with the narwhal
Or the prehistoric four tusked elephant
So I do think I have some leeway there. However I agree that these could probably be more functionally like horns that wrap around, perhaps from the back of the head. But since I think I will stick with them coming from below the zygomatic arch, I think I'll stick with tusk.
since I have decided to resolve this character further, my fiction for the tusks would be for defense and goring. Much like a bull, or hippo. I don't think herbivore or carnivore is really an issue. Gorillas are herbivores. Some in captivity have been conditioned to eat meat, but naturally that is very, very rare, and gorillas have massive canines, much like a predatory animal.
I'll go with my creature being an omnivore, like a bear.
Also I'm not worried about the direction of tusk. I don't think walrus and saber tooth, Vs elephant really impacts my creature. In fact a Saber tooth's used there teeth for tearing soft tissue, rather than for holding on to prey. from an article about Smilodon.
"The shape of the cats' teeth also supports the theory that they ripped through the throats or abdomens of their prey, leading to death through loss of blood. Because of the variations in thickness, the cats' saber teeth were stronger from front to back than side to side. This meant that their teeth easily could have been broken while trying to subdue struggling prey. However, there aren't many broken saber teeth in the fossil record, it's likely that the cats killed through slashing and stabbing rather than holding on to struggling prey." I can link you to the article if you're interested.
As far as the material being the same, I think that is a failure on my part to have an image that is further along, so there isn't enough information in this gray scale image to really discern a material change. Although I felt it was approaching more bone like, rather than skin. That just means it needs to be resolved further.
In terms of them feeling like an articulated mandible, I wonder if it isn't because it feels as if there is a knuckle or joint at the top break. Maybe re-configuring the structure there will help to clarify that area more.
Hopefully the next pass will resolve these things.
Thanks for the continued posting!!