Oospecies: sincerum MIKHAILOV, 1994
Etymology: Latin sincerus (Genuine)

Holotype: PI No. 614-58

Locality: Bain-Dzak (= Shabarak-Usu) locality, Southern Gobi Region, Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material: 3 complete eggs.

Referred material:

From the shame clutch as the holotype: PIN 614-58 (1-12): Parts of disintegrated eggs.

 

Locality: Hermiin Tsav (Khermeen Tsav), western Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material:

Number: Not given: Eggs and eggshells.

 

 

Locality: Tögrögiin Shiree (= Tugrugeen Shireh, Tugrikin-Shireh locality), Ömnögov (South Gobi), Mongolia.

Horizon: Barun Goyot Formation.

Biostratigraphy:

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

Material:

Number: Not given: Eggs and eggshells.

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Oospecies: minimum MIKHAILOV, 1994
Etymology: Latin minimus (Smallest)

Holotype: PIN No. 4228-1

Locality: Baga-Tariach Locality, Eastern Gobi Region, Dornogov’, Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material: 4 incomplete eggs.

Referred material:

Number: Not given: Numerous eggs and eggshells.

 

 

Locality: Tögrögiin Shiree (= Tugrugeen Shireh, Tugrikin-Shireh locality), Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material:

Number: Not given: Problematical pole of egg.

 

 

Locality: Ikh-Shunkht Locality, Eastern Gobi, Dornogov’, Mongolia.

Horizon: Barun Goyot Formation.

Biostratigraphy:

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

Material:

PIN No. 4477-1: ?Clutch of eggs.

 

= Protoceratopsidovum cf. Pro. minimum TANAKA, ZELENITSKY, THERRIEN, LEE, KUBOTA, KOBAYASHI, FUNSTON & KHISHIGJAV, 2023

Locality: Bayanshiree type locality, approximately 70 km south-southwest of Sainshand, Dornogove Aimag, Mongolia.

Horizon: Bayanshiree Formation.

Biostratigraphy:

Age: Cenomanian Stage, Late Gallic Supepoch, Early Gulf Epoch, Middle Cretaceous-Lower Santonian? Stage, Early Senonian Subepoch, Early Gulf Epoch, Early Late Cretaceous.

Material:

MPC-D 100/1062: Isolated eggshell fragments.

 

Locality: Shine Us Khudag locality, approximately 70 km south-southwest of Sainshand, Dornogove Aimag, Mongolia.

Horizon: Bayanshiree Formation.

Biostratigraphy:

Age: Cenomanian Stage, Late Gallic Supepoch, Early Gulf Epoch, Middle Cretaceous-Lower Santonian? Stage, Early Senonian Subepoch, Early Gulf Epoch, Early Late Cretaceous.

Material:

MPC-D 100/1061: Isolated eggshell fragments.

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Oospecies: fluxuosum MIKHAILOV, 1994
Etymology: Latin fluxuosus (flowing)

Holotype: PIN No. 3142-415

Locality: Hermiin Tsav (Khermeen Tsav), western Ömnögov (South Gobi), Mongolia.

Horizon: Red Beds, Barun Goyot Formation.

Biostratigraphy:

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

Material: Crushed eggs.

Referred material:

PIN 3142-496: Clutch of 19 eggs.

PIN 3142-451, 3142-455: Parts of eggs.

 

 

Locality: Hermiin Tsav (Khermeen Tsav), western Ömnögov (South Gobi), Mongolia.

Horizon: Djadochta Formation.

Biostratigraphy:

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

Material:

Number: Not given: Eggs and egg clutches.

 

 

Locality: Khulsan, Nemegt basin, Ömnögov (South Gobi), Mongolia.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

Number: Not given: Eggs and egg clutches.

Note: “At Khermin-Tsav and Khulsan P. fluxuosum predominates markedly over P. sincerum (the distribution of these two forms by area and by beds at these localities is unknown). At the same time the bone remains of the protoceratopsian Breviceratops kozolowskii predominate here over those of Protoceratops andrewsi. At Tugrikiyin-Shire, where Protoceratops skeletons are very numerous but Breviceratops remains are unknown, there are also not eggs of P. fuxuosum. On this basis it might be concluded that the P. fluxuosum eggs were laid by Breviceratops. However, at Bian-Dzak, where both forms of eggs occur, Breviceratops remains are unknown (although it should be noted that the PIN collection includes not only reliably identified egg of P. fluxuosum from Bain-Dzake, and all the sculptured eggs belong to Elongatoolithus).”