This is a head portrait of Torosaurus latus, a large ceratopsian dinosaur from North America during the Late Cretaceous Period, approximately 68 to 66 million years ago. Although a close cousin and contemporary of the iconic Triceratops, Torosaurus stood apart from the latter by having a longer skull with a pair of openings (or fenestrae) in its neck frill. A few paleontologists have speculated that Torosaurus may actually represent a mature form of Triceratops, although this has not become the consensus position as far as I know.