Oospecies: ningxiaensis ZHAO & DING, 1976
Etymology:

Holotype: IVPP V 4709 (Field number 73032) (old 2020S-2 (Peking, Institute of Vertebrate Paleontology and Anthropology, Chinese Academy of Sciences, V, 4709).

Locality: Chahanaobao, Bayinwula Mountina, Alxa Left Banner, Ningxia, Nei Mongol, China.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material: Egg clutch with 11 eggs.

Referred material:

IVPP V 16856 (Field numer S202, old 73032): Broken egg.

 

KUNDRAT, 2000

Locality: Unknown, Mongolia.

Horizon: Barun Goyot Formation?

Biostratigraphy:

Age: Middle –Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

SNM-Z 15751: Egg with embryonic remains.
Note: KUNDRAT believes that this type of egg was laid by a pachycephalosaurid.

 

 

MIKHAILOV, 1991

Locality: Ologoy-Ulan-Tasv, Khermiyn-Tsav and Ikh-Shunkht localities, Gobi Desert, Mongolia.

Horizon: Late Cretaceous?, Biostratragraphic equivalent of the Djachota Formation, and Barun Goyot Formation respectfully.

Biostratigraphy:

Age: Middle –Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

PIN 4225-I, 2970, no #; GI and ZPAL MgOv-III/18b, numerous in Ulan Bator Collection: 4 complete clutches Clusters of two to three layers of eggs with up to fifteen eggs in each.

 

MIKHAILOV, 1991/1994

Locality: Ikh-Shunkht Locality, Mongolia.

Horizon: Barun Goyot Formation.

Biostratigraphy:

Age: Middle –Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous..

Material:

PIN 4477-3: Part of a clutch.

 

Locality: Gil’bent, Khulsan, Khermiyn-Tsav and Khuren-Tsav localities, Mongolia.

Horizon: Barun Goyot Formation.

Biostratigraphy:

Age: Middle –Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous..

Material:

PIN 3142-461, etc: Shell fragments and broken eggs.

 

 

Locality: Bayn-Dzak locality, Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

Age: Middle Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Eggshell fragments.

 

 

 

Locality: Ologoy-Ulan-Tsav locality at Ulan-Bator, Mongolia.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

Number: Not given: Egg clutches.

 

ZHOU, REN, XI & GUAN, 1998

Locality: Qinglongshan Region, Yunxian County, Hubei Province, China.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

Number: Not given: Eggs and eggshells.