Ankylosaur Flats, Ukhaa Tolgod: Campanian, Mongolia
collected 1993–1997
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Ankylosauridae
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Ankylosauridae indet.
Brown 1908
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Arbour and Currie 2013 | |||||||||
| multiple uncollected specimens | ||||||||||
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Reptilia
- Elongatoolithidae
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Elongatoolithidae indet.
Zhao 1975
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Simon et al. 2019 | |||||||||
| IGM 100/978, IGM 100/971 (eggs) | ||||||||||
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? Elongatoolithus frustrabilis
Mikhailov 1994
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Simon et al. 2019 | |||||||||
| IGM 100/1004 (MAE 95-97) (eggs) | ||||||||||
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Reptilia
- Troodontidae
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Troodontidae indet.
Gilmore 1924
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1 individual | |||||||||
| IGM 100/983 | ||||||||||
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= Byronosaurus jaffei n. gen., n. sp.
Norell et al. 2000
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Makovicky et al. 2003 | |||||||||
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Reptilia
- Oviraptoridae
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Citipati osmolskae n. gen., n. sp.
Clark et al. 2001
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Clark et al. 2001 | 2 individuals | ||||||||
| Holotype (IGM 100/978), IGM 100/971 | ||||||||||
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Reptilia
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Kol ghuva n. gen., n. sp.
Turner et al. 2009
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Turner et al. 2009 | 1 individual | ||||||||
| IGM 100/2011 | ||||||||||
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Reptilia
- Ornithomimidae
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Ornithomimidae indet.
Marsh 1890
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1 individual | |||||||||
| IGM 100/987 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Mongolia | State/province: | Omnogov |
| Coordinates: | 43.7° North, 100.9° East (view map) | ||
| Paleocoordinates: | 40.8° North, 90.4° East | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
| Key time interval: | Campanian | ||
| Age range of interval: | 83.60000 - 72.10000 m.y. ago |
Stratigraphy
| Formation: | Djadokhta | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: This may be sublocality 8, see text (p. 449) in Dashzeveg et al. (1995). | |||||
Lithology and environment
| Primary lithology: | sandstone |
| Includes fossils? | Y |
| Environment: | eolian indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | many |
| Associated major elements: | some |
| Fragmentation: | none |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,surface (in situ),mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | AMNH | Collection dates: | 1993–1997 |
| Collection method comments: Institute of Geology, Mongolia. | |
| Taxonomic list comments:Specimen IGM 100/979 is referred to C. osmolskae. It is a postcranial skeleton on top of a nest, previously described by Clark et al. (1999). | |
Metadata
| Also known as: | Big Mamma | ||
| Database number: | 37211 | ||
| Authorizer: | J. Alroy, M. Carrano | Enterer: | R. Whatley, M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Subset of collection #: | 37184 | ||
| Created: | 2004-03-05 13:55:05 | Last modified: | 2023-10-12 15:00:32 |
| Access level: | the public | Released: | 2004-03-05 13:55:05 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 18118. | ETE | P. J. Makovicky and M. A. Norell. 1998. A partial ornithomimid braincase from Ukhaa Tolgod (Upper Cretaceous, Mongolia). American Museum Novitates 3247:1-16 [M. Carrano/M. Carrano] |
Secondary references:
| 48407 | V. M. Arbour and P. J. Currie. 2013. The taxonomic identity of a nearly complete ankylosaurid skeleton from the Gobi Desert of Mongolia. Cretaceous Research 46:24-30 [P. Mannion/J. Tennant/M. Carrano] | |
| 9961 | J. M. Clark, M. A. Norell, and R. Barsbold. 2001. Two new oviraptorids (Theropoda: Oviraptorosauria), Upper Cretaceous Djadokhta Formation, Ukhaa Tolgod, Mongolia. Journal of Vertebrate Paleontology 21(2):209-213 [J. Alroy/R. Whatley/R. Whatley] | |
| 70733 | S. A. Lee. 2016. Incubation times of dinosaur eggs via embryonic metabolism. Physical Review E 94(2):022402:1-15 [M. Carrano/M. Carrano] | |
| 12905 | ETE | P. J. Makovicky, M. A. Norell, J. M. Clark and T. Rowe. 2003. Osteology and relationships of Byronosaurus jaffei (Theropoda: Troodontidae). American Museum Novitates 3402:1-32 [M. Carrano/M. Carrano/M. Carrano] |
| 86065 | M. A. Norell, A. M. Balanoff, D. E. Barta and G. M. Erickson. 2018. A second specimen of Citipati osmolskae associated with a nest of eggs from Ukhaa Tolgod, Omnogov Aimag, Mongolia. American Museum Novitates 3899:1-44 [M. Carrano/M. Carrano] | |
| 70244 | D. J. Simon, D. J. Varricchio, Z. Jin and S. F. Robison. 2019. Microstructural overlap of Macroelongatoolithus eggs from Asia and North America expands the occurrence of colossal oviraptorosaurs. Journal of Vertebrate Paleontology 38(6):e1553046:1-16 [M. Carrano/M. Carrano/M. Carrano] | |
| 33957 | ETE | A. H. Turner, S. J. Nesbitt, and M. A. Norell. 2009. A large alvarezsaurid from the Late Cretaceous of Mongolia. American Museum Novitates 3648:1-14 [M. Carrano/M. Carrano] |