There's texture there, but it's a bit 2D and also a little out of focus I think. A more acute angle may have worked better to bring out the 3D and give perspective...
Looking for texture brought out by the use of light - I see the most on chin profile, which is off focus. There is some visible 3D texture in the cheek/jowl area. But I would have liked to see more use of light specific to the challenge requirements. That said, it's not a bad photo, just not a great one.
As far as meeting the challenge, you did, but I can't help but feel like the creativity/artistic vision is missing here...it definitely is more of a snapshot.