An amateur paleontologist, Stephanie Leco, has unearthed 220 million years old jaw bone of a long-snouted fish this summer. The fossil was unearthed from the site located in Arizona's Petrified Forest National Park, which was once a lake or pond during the Late Triassic period.

Experts said the site, where the fossil has been found, is the place where dinosaur age fossils are routinely found. Petrified Forest National Park paleontologist Bill Parker said that except this place, the only place where fossils from the Late Triassic period are found is in China.

During the citizens dig, Leco, 26, has found the fossil during the citizens dig held at the park last month near Holbrook. Leco said that she is now even more interested in this field. She shared that since the discovery has been made, she has started collecting books that include Triassic period to increase her knowledge.

Ben Kligman, a senior at the University of California, Berkley, said the fossil is believed to belong to a new species of fish, but he added that it cannot be confirmed without the entire fossil. Ben said that he has plans to return the site next summer and find the rest of the fossil and prove that the species that Leco has found is a new one.

"Although it's probably a new species, we can't say that it is yet because we don't have enough specimens", affirmed Ben.