#polyclonoolithus

Polyclonoolithus is a recently found dinosaur egg from the Hekou Group in Gansu, China. It is known from one incomplete egg, made up with several fragments, and it was probably less than 10 cm in diameter. The eggshell ranges between 1.84 and 2.05 mm in thickness, and it has branching shell units with irregular pores. It is fairly unknown what kind of dinosaur laid this egg. 

Sources:

http://www.asianscientist.com/2016/04/in-the-lab/new-dinosaur-egg-china-chinese-academy-sciences/

https://en.wikipedia.org/wiki/Polyclonoolithus