Artist reconstruction of Mercuriceratops gemini, a new species of horned dinosaur that had wing-like ornamentation on the sides of its skull. The second image shows Mercuriceratops gemini skull fossils from the right side of the frill. Danielle Dufault/Naturwissenschaften

Scientists have discovered a new species of horned dinosaur with a unique wing-like headgear, which roamed North America about 77 million years ago.

The dinosaur, named Mercuriceratops gemini, grew to be approximately 20 feet long and weighed more than two tons, according to scientists who made the discovery based on fossils collected from the U.S. state of Montana and the province of Alberta in Canada. The dinosaur, with a parrot-like beak and two long brow horns above its eyes, lived during the Late Cretaceous Period and was a plant-eating animal, scientists said in a study, published in the journal Naturwissenschaften.

“Mercuriceratops took a unique evolutionary path that shaped the large frill on the back of its skull into protruding wings like the decorative fins on classic 1950s cars. It definitively would have stood out from the herd during the Late Cretaceous,” Michael Ryan, a curator of vertebrate paleontology at The Cleveland Museum of Natural History in Ohio and the study’s lead author, said in a statement.

The name Mercuriceratops, meaning “Mercury horned-face,” refers to the wing-like ornamentation on the dinosaur’s head that looks like the wings on the helmet of the Roman god, Mercury. According to scientists, horned dinosaurs in North America used their wing-shaped ornamentation not only to protect themselves from predators, but also to identify each other and to attract mates.

“The Alberta specimen confirmed that the fossil from Montana was not a pathological specimen, nor had it somehow been distorted during the process of fossilization,” Philip Currie, a professor and the Canada research chair in dinosaur paleobiology at the University of Alberta, said in the statement. “The two fossils—squamosal bones from the side of the frill—have all the features you would expect, just presented in a unique shape.”

The discovery of Mercuriceratops is the latest in a series of new findings by Ryan and David Evans, a curator of vertebrate paleontology at the Royal Ontario Museum and the study’s co-author, as part of their Southern Alberta Dinosaur Project, which is focused on Late Cretaceous dinosaurs and their evolution.

“The butterfly-shaped frill, or neck shield, of Mercuriceratops is unlike anything we have seen before,” Evans said, in the statement. “Mercuriceratops shows that evolution gave rise to much greater variation in horned dinosaur headgear than we had previously suspected.”