Pingling Laminated Egg Mother Dinosaur may belong to Hadrosaurus

Pingling laminated egg shell fragments, a, b, c represent the materials of Nanxiong, Shanyang, and Laiyang respectively (the scale is 1 cm)

Comparison of the microstructures of eggshell chord sections between Pingling laminated eggs (upper and middle) and Jiangjunding round eggs (lower).

Recently, "Historical Biology" published online research results of Pingling Laminated Eggs by Wang Xiaolin's research team from the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences.

In recent years, the research team has found a large number of eggshell fragments in the Late Cretaceous strata in Shanyang Basin, Shanyang Basin, Shandong Province, and Laiyang Basin, Shandong Province.

The revised genus of Laminaria includes: nodular ornamentation, scattered tumor spots on the surface, which can be elongated into short ridges or connected to form a network of ridges.

Wang Xiaolin pointed out that the egg species has very little material found in China and lacks a complete egg body, so it is not yet possible to classify it into a known egg family.

Pingling stacked eggs were once classified as Megalolithidae (Megaloolithidae).

Among other dinosaur egg families, Pingling Laminated Eggs only have eggshell structures that are easily confused with some members of the round egg family.

For a long time, the eggs of Ceratophyllum have been regarded as members of the round egg family.

In the past, researchers in North America and Europe classified some dinosaur eggs, including the eggs of Ceratosaurus, into the round egg family on the basis of fissure-type stomata.

It is very difficult to confirm the relationship between dinosaur egg types and their egg-laying mothers.

This research was funded by the National Natural Science Foundation of China, the Strategic Pilot Project of the Chinese Academy of Sciences, and the Dinosaur Cooperation Project of the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences-Laiyang Municipal People's Government.

Related paper information: org/10.