Scientists have uncovered interesting information from the remains of a prehistoric shark that lived in the waters of South Dakota.
The shark, which lived 67 million years ago and weighed more than two tons, had a space-like tooth, scientists said.
Scientists pointed to the prehistoric shark in Dakota rivers similar to the current species of sharks, that is living in the bottom of the river, which lies prey on the floor of the oceans, as reported by the newspaper "Independent" British.
It is not clear whether this shark has any contact of any kind with the dinosaurs that were living in the area.
The scientists called the shark the name "Galagadon Nordkwiste", and derived the name from the name of the video game Galaga, which spread in the eighties of the last century, because of the similarity between the teeth of this shark with the spacecraft in that game.
"These shark teeth were good for catching small fish or smashing river snails," said Terry Gates, a scientist at the University of North Carolina.
The age of this shark is no more than the head of the pen, which is all that remains of this prehistoric fish, since its structures were cartilage rather than bone, and therefore no fossils were found.
The volunteer at the Field Museum of Natural History in Chicago, Marin Nordkwist, who helped discover fossils and shark teeth, said it was difficult to observe these teeth in the historic sand deposits of the river.
It is said that the shark was named Nordquist also, following the name of Karen discovered teeth.
Karen said that for the normal naked eye, the teeth are like a small pump, and there is no need for a microscope to see them clearly.
The teeth of this shark resemble shark teeth near Australia, giving scientists an idea of the shape of the historic shark.
Scientists believe that the old shark fish has a flat face that allows it to stay on the river's floor.
