Genus: Bagaceratops MARYANSKA, & OSMOLSKA, 1975
Etymology: Mongolian, baga, “small” and Greek, ceratops, “horn face”: “Small horn face”; probably smaller in size than other protoceratopsians.
= Breviceratops KURZANOV, 1990
Etymology: Latin, brevis, “short” and Greek, Ceratops, “horn face”: “Short horn face”.
= Gobiceratops ALIFANOV, 2008
Etymology: From the Gobi Desert and the generic name Ceratops.
= Lamaceratops ALIFANOV, 2003
Etymology: From Lama (Buddhistic monk) and the generic name Ceratops.
= Magnirostris YOU & DONG, 2003
Etymology: Latin, magnus, "large" and Latin, rostrum, "beak": for the robust rostral bone of this specimen.
= Platyceratops ALIFANOV, 2003
Etymology: Greek, platys, ‘flat’, and the generic name Ceratops.

Species: rozhdestvenskyi MARYANSKA & OSMOLSKA, 1975
Etymology: In honor of Dr. A. K. Rozhdestvensky, in recognition of his work on dinosaurs.

Holotype: ZPAL MgDI/126

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

Horizon: Khermeen Tsav Formation.

Biostratigraphy:

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

Material: Nearly complete skull with mandible, lacking anterior portion of snout.

Referred material:

ZPAL MgDI/123: Skull with dentary of a very immature individual lacking palatal as well as basicranial and occipital region.

Bagaceratops rozhdestvenskyi (modified from MARYANSKA & OSMOLSKA, 1975), ZPAL MgDI/123.

ZPAL MgDI./124, 125: 2 nearly complete sub-adult skulls with mandibles.

Bagaceratops rozhdestvenskyi (modified from MARYANSKA & OSMOLSKA, 1975), ZPAL MgDI/125.

 

ZPAL MgDI./129: Nearly complete adult skull lacking nasals and posterior cranial region.

ZPAL MgDI./127, 128, 130, 132, 134, 135, 144, 145, 149, 149,150: 14 fragmentary skulls, some with fragmentary mandibles.

ZPAL MgDI./137, 138, 140, 152-154: 8 more or less complete mandibles.

ZPAL MgDI./141: Several loose teeth.

ZPAL MgDI./142, 146, 152, 154: Some fragmentary postcranial bones.

SANEYOSHI, WATABE, SUZUKI & TSOGTBAATAR, 2011

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

Horizon: Barun Goyot Formation.

Biostratigraphy:

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

Material:

MPD-D 100/535: Fragmentary skull and skeleton.

Note: Has beetle borings on the skeleton.

KIM, YUN & LEE, 2019

KID196: Fragmentary skull and skeleton.

 

= Breviceratops kozlowskii (MARANYASKA & OSMOLOSKA, 1975) KURZANOV, 1990
Etymology: In honor of Prof. Roman Kozlowski, the eminent Polish paleontologist.
= Protoceratops kozlowskii MARYANSKA & OSMOLSKA, 1975

Holotype: ZPAL MgD-1/117

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

Horizon: Barun Goyot Formation.

Biostratigraphy:

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

Material: Nearly complete skull and part of postcranial skeleton of a juvenile.

Breviceratops kozlowskii (modified from MARANYASKA & OSMOLOSKA, 1975), Holotype: ZPAL MgD-1/117.

Referred material:

ZPAL MgD1/116: Fragmentary skull of a juvenile.

ZPAL MgD1/118: 2 nearly complete dentaries with fragmentary postcranial elements of a young individual.

PIN 3142/2, 3: Nearly complete skulls.

PIN 3142/4: Skull missing snout and some of the frill, and dentary, of an adult.

PIN 3142/5: Skull of an adult.

 

= Lamaceratops tereschenkoi ALIFANOV, 2003
Etymology: In honor of the paleontologist V. S. Tereschenko, who found the specimen.

Holotype: PIN 4487/26

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

Horizon: Barun Goyot Formation.

Biostratigraphy: Djadochtatherium catopsaloides KIELAN-JAWOROWSKA, Nemegtbaatar gobiensis KIELAN-JAWOROWSKA, and Chulsanbaatar vulgairs KIELAN-JAWOROWSKA Zone.

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

Material: Skull with damaged palate and damaged left side and provided with the right ramus of the lower jaw.

Referred material:

PIN 3142/1: Skull missing the snout and some of the frill of a juvenile.
Note: Stolen CHURE, 2000


= Magnirostris dodsoni YOU & DONG, 2003
Etymology: In honor of Peter Dodson for his contribution to the study of horned dinosaurs.

Holotype: IVPP V12513

Locality: Bayan Mandahu, Urad Houqi, Inner Mongolia (Nei Mongolia), China.

Horizon: Djadochta Formation, Redbeds.

Biostratigraphy:

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

Material: An almost complete skull and articulated lower jaw.

 

= Platyceratops tatarinov ALFANOV, 2003
Etymology: In honor of the paleontologist L. P. Tatarinov.

Holotype: PIN 3142/4

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

Horizon: Barun Goyot Formation.

Biostratigraphy:

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

Material: Skull with the lower jaw.


= Gobiceratops minutus ALIVANOV, 2008
Etymology: Latin, minutus, "small."

Holotype: PIN no. 3142/299

Locality: Hermiin Tsav (Khermeen Tsav), Nemegt Basin, Southern Gobi Aimak, western Ömnögov (South Gobi), Mongolia.

Horizon: Baruungoyot Formation.

Biostratigraphy:

Age: ?Lower Santonian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Almost complete skull (squamosals, right postorbital, and left frontal are lost, the posterior and partially anterior margin of the parietal) are damaged with lower jaw.