According to a statement from Idaho State University (ISU), the museum was bequeathed to a brand-new set of helicopter fossils, belonging to the extinct spirochete, an ancient cartilaginous fish nicknamed "Humsaw Shark", for obvious reasons. When you see that its teeth were drawn directly by the artist from the shop,
Fossils found in a mine in Monsanto are more than 8 inches (20 cm) in diameter, or slightly smaller than NBA basketball. Researchers at the museum said that this huge thread showed that this ancient fish could grow to a terrible proportion, possibly as long as 25 feet (7.7 meters). The newly discovered Buzz saw shark fossil shows that the impressive tooth "thread" of this ancient carnivore can grow to 150 sharp teeth. (Idaho State University)
Ye Xiaokai Tapanila, a professor at the American University of International Science and director of the Idaho Museum of Natural History, said in a statement: "Our research on the retreat shows that it was the largest carnivore on the earth at that time, nearly 270 million years ago." He said that Idaho is the best place to find these amazing fossils on earth.
This buzzing saw shark is a strange ancestor of modern rat shark (or "ghost shark"), which died out about 225 million years ago. According to Ars Technica, its unorthodox threaded jawbone fossils, like spiral shells with sharp teeth, have puzzled researchers for more than a century and induced some early paleontologists to regard it as ammonite fossils. Later, researchers imagined rotifers as part of a pointed nose-like appendage or an awkward tongue sticking out of a shark's big mouth. 25 magical ancient beasts
A paper published in Biology Letters on 20 13, written by Tapanila * *, studied the computerized tomography (CT) scanning of the fossil fragments of the spirochete skull to finally determine the purpose of Wall. The researchers found that this mysterious spiral tooth did not curl outward as predicted by previous researchers, but grew in the lower jaw of fish like a "partially hidden tooth factory".
When new teeth grow at the back of the fish mouth, the whole gear teeth rotate forward to make room for the teeth. Finally, the old teeth in the front of the mouth curl inward and are stuffed into the fish's jaw in a strange spiral shape. Tapanila and his colleagues wrote that some fossils can show 150 teeth in a single gear tooth.
Better, because Buzz saw sharks don't have teeth on their upper jaws. Tapanila and his colleagues wrote in the paper 20 13: "With this row of radial sharp teeth, sharks are likely to feed on mollusks such as cephalopods. The Idaho Museum of Natural History is the most important racemic fossil library in the United States. " . The museum said that Xinhua Stone will be exhibited as part of the museum's "Buzzsaw Sharks in Idaho" exhibition, which has been on tour for five years and will return to Idaho in June+10, 5438.
Originally published in the journal Life Science,