Monodon monoceros, narwhal tusk Pteranodon This replica skull is from

This replica skull is from a juvenile Lambeosaurus

They are found singularly or in large groupings

but the horn cores remain separate

particularly in fiction and by journalists

Meniscoessus is a genus of extinct mammal from the Upper Cretaceous Period of North America

Monodon monoceros, narwhal tusk Pteranodon This replica skull is fromThe narwhal, or narwhale (Monodon monoceros), is a medium sized toothed whale and possesses a large "tusk" from a protruding canine tooth. It lives year round in the Arctic waters around Greenland, Canada, and Russia. It is one of two living species of whale in the Monodontidae family, along with the beluga whale. The narwhal males are distinguished by a long, straight, helical tusk, which is an elongated upper left canine. The narwhal was one of many