Öösh Formation

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Coordinates: 44°12′N 102°42′E / 44.2°N 102.7°E / 44.2; 102.7
Source: Wikipedia, the free encyclopedia.
Öösh Formation
Ma
Type
Ovorkhangai
Country Mongolia
Öösh Formation is located in Mongolia
Öösh Formation

The Öösh Formation, also known as the Tevsh Formation is a geological

claystones and sandstones, along with black thinly laminated shales. The claystones and sandstones were deposited as part of an alluvial fan system, while the shales were deposited in lakes present in the foot of the fan.[2] Many of the fossils come from the "Cannonball beds", which comprise the lowest 60 metres of the unit and consist of green siltstone.[2]

Vertebrate paleofauna

Dinosaurs

Dinosaurs of the Öösh Formation
Genus Species Location Stratigraphic position Material Notes Images
Asiatosaurus A. mongoliensis Teeth Indeterminate
sauropod
Prodeinodon P. mongoliensis Several teeth, fragmentary tibia, fragmentary fibula Indeterminate
theropod
Protiguanodon
 		P. mongoliensis Reclassified as a species of Psittacosaurus, Psittacosaurus protiguanodonensis
Psittacosaurus P. mongoliensis
Psittacosaurus fossil from the Hühteeg Svita with gastroliths in its stomach region, American Museum of Natural History
P. protiguanodonensis Junior synonym of P. mongoliensis
Shanag[3] S. ashile[3]

Mammals

Mammals of the Öösh Formation
Genus Species Location Stratigraphic position Material Notes Images
Gobiconodon[4] G. hopsoni[4] Cannonball Member of Öösh Formation, possibly equivalent of Tevsh Formation Two upper and lower jaws (PSS-MAE 140 (Holotype) & PSS-MAE 139)

Pterosaurs

Pterosaurs of the Öösh Formation
Genus Species Location Stratigraphic position Material Notes Images
Indeterminate tapejaroid[2][5] "Single cervical vertebra (IGM 100/1321)"[2]

Squamates

Squamates of the Öösh Formation
Genus Species Location Stratigraphic position Material Notes Images
Norellius[6] N. nyctisaurops "Nearly complete skull with mandibles and partial hyoid" Gekkonomorph
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.

See also

  • List of dinosaur-bearing rock formations

References

  1. ISBN 0-520-24209-2
    .
  2. ^ a b c d Andres, B. and Norell, M.A. 2005. The first record of a pterosaur from the Early Cretaceous strata of Öösh (Övörkhangai; Mongolia). American Museum Novitates 3472: 1–6. [1]
  3. ^
    S2CID 31096081
    . Retrieved 2007-03-29.
  4. ^ a b Kielan-Jaworowska, Z., Dashzeveg, D. (1998). "Early Cretaceous amphilestid ("triconodont") mammals from Mongolia" (PDF). Acta Palaeontologica Polonica. 43 (3): 413–438.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ^ "Tapejaroidea indet". Fossilworks. Retrieved March 4, 2022.
  6. S2CID 128946074
    .
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