100 million years ago, lizards liked to eat "hemp small"?
Also known as the Northeast Crayfish, the clam is native to Northeast China and other places, and is a close relative of the protagonist of the spicy crayfish that has swept the north and south of the river.
A specimen of Yabe dragon during the Qing restoration process, whose stomach contents have not been exposed. The images in this article are provided by the respondents
On November 19, Chinese and foreign scientists led by Xing Lida, an associate professor at China University of Geosciences (Beijing), announced in Beijing that they had found a rare gastric specimen of a Yabu dragon lizard in Jianchang County, Liaoning Province, an ancient cockroach, a 100-million-year-old "crayfish" about 12 centimeters long. Past fossils of Yabu dragons have recorded stomach contents containing fish remains, and large crustaceans have been found for the first time.
"For Yabu Dragon, whose nose and hips are about 22 centimeters long, it was a very hearty meal." Xing Lida said.
Yabe dragon specimen.
The relevant research paper was published in the international academic journal "Cretaceous Research" on the 19th.
Xing Lida said that stomach fossils are rare and important, helping people understand the feeding habits of paleontologists.
The fossil preserves the claws of large crustaceans, a slender segment of pectoral foot fragments, mouthparts and broken antennae, whose characteristics match those of palaeocambarus licenti.
The Rehe biota in China has found a large number of fossils of freshwater crawfish dating from about 130 million to 120 million years old. The scientific name of the crayfish that people often eat at present is the original crawfish, which is native to the north coast of the Gulf of Mexico in the United States, Louisiana, and was later introduced to China and became a popular "hemp small". Paleontologist Shen Yanbin believes that crayfish originated from East Asia and then spread to Central Asia, Europe and North America.
Outline of the ancient salamander.
The aforementioned "crayfish", the ancient cockroach, is located in the stomach of a fossil yabeinosaurus specimen. The specimen was found in the Lower Cretaceous Nine Buddha Hall Formation formation in the Lama Cave area of Jianchang County, Liaoning Province. When the Yingliang Stone Museum of Natural History collected this specimen, it was in an unpaid state, and under the treatment of the technicians of the original laboratory of the fossil mine Jingqing Restoration under the museum, the huge claw foot of the "crayfish" was first exposed from the stomach of the Yabe dragon.
Yabe dragon is the first lizard named for the Rehe biota, and its fossils were originally discovered and named by Japanese scholars, and its type specimen was lost during the War of Resistance Against Japan. There are three species of Yabu Dragon: Strong Yabu Dragon, Yang's Yabu Dragon, and Two-pointed Yabu Dragon.
The aforementioned specimens of Apatosaurus containing the stomach contents of the undigested crustacean crustacean should be classified as juvenile strong sagittarius.
Combining all stomach contents records, although Yabu Dragon lacked obvious swimming morphological characteristics, the researchers believe that Yabu Dragon had a habit of preying on river banks. Since no carapace fragments were found in the stomach of the aforementioned Yabu Dragon, they believe that the ancient cockroach that the small lizard preyed on may be molting on the riverbank.