Alagteeg Formation
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The Alagteeg Formation is a geological formation in Mongolia whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation. It predominantly consists of alternating reddish brown mudstone and horizontally laminated sandstone, with ripple cross laminations and rhizoliths. It was first formally defined as a unit by Hasegawa et al. in 2008 as a distinct unit from the overlying Djadochta Formation. The environment of deposition is suggested to be fluvial, originating in sandy braided river, floodplain and ephemeral lake depositional environments, as opposed to the desert depositional environment of the Djadochta Formation.
Fossil content
| Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon | Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited. | |||||
| Taxon | Reclassified taxon | Taxon falsely reported as present | Dubious taxon or junior synonym | Ichnotaxon | Ootaxon | Morphotaxon |
Dinosaurs
Sauropoda
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|---|---|---|---|---|---|---|
| Abdarainurus | A. barsboldi | A titanosaurian sauropod |
Ornithischians
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|---|---|---|---|---|---|---|
| Pinacosaurus | P. grangeri | A ankylosaurid thyreophoran | ||||
| Plesiohadros | P. djadokhtaensis | A hadrosauroid ornithopod | ||||
| Protoceratops | P. andrewsi | A protoceratopsid ceratopsian |
Turtles
| Turtles of the Alagteeg Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Trionychidae Indet. | Indeterminate |
See also
Bibliography
- Averianov, Alexander O.; Lopatin, Alexey V. (2020), "An unusual new sauropod dinosaur from the Late Cretaceous of Mongolia", Journal of Systematic Palaeontology, 18 (12): 1009–1032, Bibcode:, doi:
- Hasegawa, Hitoshi; Tada, Ryuji; Ichinnorov, Niiden; Minjin, Chuluun (2009), , Journal of Asian Earth Sciences, 35 (1): 13–26, Bibcode:, doi:
- Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), , Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2
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