Nicely done! I wish more people would draw these guys with the spiny quills along the back, it looks great and from the way things are going it's scientifically plausible as well. The frill on this guy is very regal and elegant, and the subtle color pattern you gave him is perfect.
Every body part (not including the frill) looks like it's Triceratops, but the only thing different in Triceratops is that the frill is like 2 times the size. Now I'm seeing why scientists are saying that Triceratops is only a young Torosaurus.
Well, it is actually a recombinant of Triceratops and Torosaurus, because I want to see what does the Triceratops in Jack Horner's theory--though many scientists disagree it--looks like and just for fun.