Heishanoolithus

{{Oobox

| fossil_range = {{fossil range|145|100|Early Cretaceous}}

| taxon = Heishanoolithus

| authority = Zhao and Zhao, 1999

| subdivision_ranks = Oospecies

| subdivision =

• {{extinct}}H. changii Zhao and Zhao 1999 (type)

}}

Heishanoolithus is an oogenus of Elongatoolithid fossil egg from the Shahai Formation in Liaoning. It is known only from seven eggshell fragments. It is most notable for having a very thin eggshell (1.2-1.3 mm thick), the dense covering of nodes on the eggshell surface, and for its relatively thin mammilary layer (making up only one eighth of the eggshell thickness).Zhao H. and Zhao Z. (1999) "[http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/200902/W020090813372676211343.pdf A New Form of Elongatoolithid Dinosaur Eggs from the Lower Cretaceous Shahai Formation of Heishan, Liaoning Province]." Vertebrata PalAsiatica, 37(4): 278-284. While no remains of Heishanoolithus have been associated with skeletal remains, strong evidence links Elongatoolithid eggs to Oviraptorosaurs.Simon, D. J. (2014). "[http://scholarworks.montana.edu/xmlui/bitstream/handle/1/8693/SimonD0814.pdf?sequence=1 Giant Dinosaur (theropod) Eggs of the Oogenus Macroelongatoolithus (Elongatoolithidae) from Southeastern Idaho: Taxonomic, Paleobiogeographic, and Reproductive Implications.] {{Webarchive|url=https://web.archive.org/web/20160304071123/http://scholarworks.montana.edu/xmlui/bitstream/handle/1/8693/SimonD0814.pdf?sequence=1 |date=2016-03-04 }}" (Doctoral dissertation, Montana State University, Bozeman).