科研之友
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摘要
The discovery and research of dinosaur eggs in Xichuan basin began in 1974. Dinosaur eggs in Xichuan basin have very high diversity. There are 4 oofamilies, 6 oogenera and 6 oospecies, especially dendroolithids. In recent years, during the investigation of geoheritages in Henan Province by Henan Geological Museum, some new types of dinosaur eggs have been found again in Xichuan basin. Here we describe one of them. According to the following characteristics: the shell unit is an irregular branch with multi branches, the eggshell thickness is 1.62~1.74 mm, the cone gap is obvious, the shell unit begins to branch from the upper part of the cone, the middle part of the eggshell has 3~4 branches, and a fusion layer is formed near the outer surface of the eggshell, and the eggshell has complex pore system, we establish a new oospecies Dendroolithus dashiqiaoensis oosp. nov. Studying the classification and correlation of dinosaur eggs in Xichuan basin, the distribution of different types of dinosaur eggs in the strata, it will promotes the division of red beds in the basin, which will provide more detailed paleobiological evidence for the division and correlation of red beds, paleogeography, paleoenvironment and paleoclimate in the different Mesozoic basins in the eastern Qinling Mountains.
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