The study found that the new group of animals in Daqingshan, the Hunnu Lao alligator

Scational Map of alligator specimens from Hunnu Laos
Recently, the Journal of Systems Paleontology published online the latest results of Dr. Liu Jun and Dr. Chen Jianye, researchers at the Institute of Paleontology and Paleoanthropology of the Chinese Academy of Sciences. The research paper reports on an incomplete skeleton of a reptile from Baotou II (252 million years ago) in Inner Mongolia, named the Hunnu Lao alligator, which is now classified as a sluggish alligator.
The discovery of Lao alligators in Daqingshan adds similarities between the late 2000s and the Lao four-legged facade, confirming the researchers' previous hypothesis that Lao four-legged animals migrated from north China, suggesting that land connections existed between the North and South China plates and Southeast Asia at the end of the Second Fold.
is an early tit-for-tying class that has not yet been fully identified in its classification location. General body length can be more than one meter, the head shape is somewhat similar to crocodiles, the most typical features are the back of the body on the spine and spherical intervertebral vertebrae (figure). According to the shape of the tablet, we can distinguish between the hysteresis alligator and the Bi's. Some species live in water like alligators, according to side-line systems, skull morphology, etc. The earliest fossil record of this group came from the Dashankou animal group in Yumen, Gansu Province, China, which experienced a mass extinction event at the end of the Second Fold period, and the latest group has continued into the late Tri-Tri-
fossils were discovered in 2010 and the top surface of the skull in the wild has been weathered and exposed in half. Because the fossils were different, the researchers immediately arranged for the specimen to be repaired, which was completed in 2011. Because the specimen's skull was flat and covered with tattoos, it was similar in size to Russia's orchids and was initially thought to be a sub-crawler. But after careful observation by the researchers, it was found that the new specimen was very different from the sub-crawl, especially if the skull had no temporal holes and nostrils were on both sides. Its jaw is very similar to that found in Yumen, Gansu Province, China, but the new specimen does not have the typical ale and intervertebral vertebrae of the hysteresis, and the pattern of the shoulder blade is also very different from that of the known slug. This has left researchers confused about the evolutionary classification of new specimens. Laos discovered some of the same period four-legged animals in the 1990s. In 2018, a new sluggish alligator was named the Lao alligator. This group is very similar to the Daqingshan material being studied at the time. The new article classifys the material of Daqingshan as a Lao alligator genus, but there are doubts about whether the Lao alligator can be classified as a sluggish alligator.
paper combed through the systematic relationship between the sluggish alligators, but because most of the genus of this group only A-pieces were preserved, there were very few species with skulls preserved, and only a few genus with head and back bones. The oldest sluggish alligators of our time also don't provide much anatomical information, so more complete fossils and more research are needed to solve the classification of this group. (Source: Cui Xueqin, China Science Daily)
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