Coralloidoolithus is an oogenus of dinosaur egg from the Tiantai Basin in Zhejiang Province, containing a single known oospecies C. shizuiwanensis.

Fossils continued to be excavated there, but were not extensively studied until 1994 when Fang et al. received funding from the National Natural Science Foundation of China.

They named a new oogenus, Coralloidoolithus, for P. shizuiwanensis, and referred several of their newly discovered specimens to C.

Secondary shell units make up the outermost of these zones and also fill many of the pore canals.

[1] Coralloidoolithus can be distinguished from Stalicoolithus by having a thinner eggshell and by having fewer secondary shell units.

[1] Also, specimens found in the Gobi Desert[1] and in Bosung County, Chullanam-do Province, South Korea[5] have been referred to this oospecies.