Rare stomach specimen found: Lizard eats ancient crayfish 100 million years ago

BEIJING, Nov. 19 (Xinhua) — A team of Chinese and foreign scientists announced in Beijing today that they have discovered for the first time a rare sample of gastric appearance in Jianchang County, Liaoning Province, which is important for us to understand the feeding habits of small and medium-sized reptiles in the Cretaceous period. The study was led by Associate Professor Yu Lida of the University of Geology (Beijing), Executive Director of the Yingliang Stone Museum of Natural History, and Professor Susan J. E. Evans (Susan E. Evans) and other scholars. The research paper was published in The Cretaceous Study of elsevier Publishing Group.

Rare stomach specimen found: Lizard eats ancient crayfish 100 million years ago

The python specimen of the clean-up process, the stomach content has not been exposed.

The stomach is a very rare and important fossil record and is a direct evidence of our understanding of the foodofe nature of paleontology. The specimens in this study were found in the formation of the Lower Cretaceous Nine Buddha’s Church in the Lamacave area of Jianchang County, Liaoning Province, China, and are an interesting Yabeinosaurus specimen containing undigested crustacean stomach objects, currently in the newly trial-opened Yingliang Stone Museum of Natural History.

Rare stomach specimen found: Lizard eats ancient crayfish 100 million years ago

2 Acer dragon specimens

The yatou dragon comes from the world-famous hot river biota, which is also the first lizard named after the herd, and is widely distributed in the formations of the Lower Cretaceous Toui County Group and the Jiufu Tang Group. The yam dragon is often found with wolf finfish, Manchuria turtles and a variety of insect fossils. Its fossils were originally discovered and named by Japanese scholars, and the model specimen was lost during the Anti-Japanese War, consisting of three species: the strong Yakao dragon, the Yang’s Yakao dragon, and the two-pointed dragon. Through body length and bone morphology analysis, the new specimen should be classified as an underage strong python with a nose and hip length of 22 cm.

Past fossils of the yamen have recorded stomach sons containing fish debris, while large crustaceans have been found for the first time. Yingliang Stone Natural History Museum to collect this specimen when the plate is not cleared state, stomach content is in the museum’s fossil mine crystal qing repair original laboratory technicians exquisite repair skills gradually exposed, the first exposed is a huge foot. The discovery of crustacean stomach objects enriches the predatory target of the yak dragon and makes the ancient ecological location of the yak dragon more clear. The large crustacean preserved the back of the pestaled, a slender piece of chest-footed, mouthand and broken tentacles, all of which matched the Palaeocambarus licenti.

Rare stomach specimen found: Lizard eats ancient crayfish 100 million years ago

3 stomach contents of a dragon specimen

The crayfish we often eat is called Kercin’s raw prawn, which originated on the north shore of the U.S. Gulf of Mexico and in Louisiana, so it’s also known as “Louisiana prawns.” Later introduced to China, because of its edible value to achieve the popular “mahogany”. A large number of freshwater prawn fossils have been found in China’s hot river biota, about 130 million to 120 million years ago, Shen Yanbin researchers of Nanjing Institute of Paleontology have studied these specimens, speculating that crayfish were transmitted from East Asian origin stoably to Central Asia, Europe and North America.

Rare stomach specimen found: Lizard eats ancient crayfish 100 million years ago

4 Close-up of the head of a dragon specimen

The length and proportion of the prawn fragments found tell us that the ancient slugs were about 12 to 13 cm, which was a very hearty meal for the dragon. Interestingly, there is a lack of crustacean fragments in the stomach cavity of the python, so the little lizard is likely to have preyed on the ancient dragonflies that are molting on the banks of the river. Combined with all stomach profile records, we still believe that the dragon has a habit of predation on the riverbank, despite the lack of obvious swimming morphological characteristics.

Rare stomach specimen found: Lizard eats ancient crayfish 100 million years ago

5 Sansan’s ancient swashes outline

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