Aitym Formation: Difference between revisions

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	The '''Aitym formation''' is a ] in ] which possibly dates to the ] stage of the ] period.<ref name=":0">{{Cite journal \|last=Averianov \|first=A \|date=2003 \|title=Mammals from the Upper Cretaceous Aitym Formation, Kyzylkum Desert, Uzbekistan \|url=https://linkinghub.elsevier.com/retrieve/pii/S0195667103000375 \|journal=Cretaceous Research \|language=en \|volume=24 \|issue=2 \|pages=171–191 \|doi=10.1016/S0195-6671(03)00037-5}}</ref>		The '''Aitym formation''' is a ] in ] which possibly dates to the ] stage of the ] period.<ref name=":0">{{Cite journal \|last=Averianov \|first=A \|date=2003 \|title=Mammals from the Upper Cretaceous Aitym Formation, Kyzylkum Desert, Uzbekistan \|url=https://linkinghub.elsevier.com/retrieve/pii/S0195667103000375 \|journal=Cretaceous Research \|language=en \|volume=24 \|issue=2 \|pages=171–191 \|doi=10.1016/S0195-6671(03)00037-5}}</ref>

Revision as of 17:42, 26 December 2024

Geological formation in Uzbekistan

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Aitym formation
Stratigraphic range: ?Santonian ~86–83 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Overlies	Bissekty Formation
Thickness	up to
Location
Aitym Formation (Uzbekistan)

The Aitym formation is a Geological formation in Uzbekistan which possibly dates to the Santonian stage of the Late Cretaceous period.

The formation has not been precisely dated, however, certain fossils suggest the formation as being deposited during the Santonian stage of the Late Cretaceous period. However, more study needs to be done in order to precisely date the formation.

Fossil Content

A diverse fauna has been unearthed from the Aitym formation including Oysters, Ammonites and many marine vertebrates, including a diverse and abundant assemblage of Chondrichthyans ( cartilagenous fish) and a rarer assemblage of Osteichthyans ( bony fish), as well as rather infrequent finds of Plesiosaurs, and possible finds of Sea Turtles. Terrestrial vertebrate remains are extremely rare in the formation. A few bones of Salamanders, Lizards, Crocodiles, possibly terrestrial Turtle remains, Dinosaurs (including Birds), and Mammals have been found in the Formation.

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.

Mammals of the Aitym Formation
Genus	Species	Location	Notes	Images
Uzbekbaatar	U. wardi		A cimolodontan multituberculate
Shalbaatar	cf. S. sp.		A spalacotheriid symmetrodont
Deltatherus	Cf. D. sp.		A deltatheroidan Reclassified as Deltatherus as the two genera have been synonymized
Daulestes	aff. D. sp		A asioryctithere
Kulbeckia	Kulbeckia sp. cf. K. kulbecke		A possible zalambdalestid
Kulbeckia	aff. Kulbeckia sp.		A possible zalambdalestid
Paranyctoides	Paranyctoides sp. cf. P. aralensis		A Possible lipotyphlan
Paranyctoides	Paranyctoides sp.		A Possible lipotyphlan
Eoungulatum	E. sp. cf. E. kudukensis		Zhelestid ungulatomorphs
Parazhelestes	P. sp. cf. P. robustus
Parazhelestes	P. sp. aff. P. minor
Aspanlestes	cf. A. sp.

Molluscs of the Aitym Formation
Genus	Species	Location	Notes	Images
Placenticeras	P. kyzylkumense		A Placenticerati Ammonite

Amphibians of the Aitym Formation
Genus	Species	Location	Notes	Images
Eoscapherpeton	E. asiaticum		A Genus of Large Giant Salamander

References

^ Averianov, A (2003). "Mammals from the Upper Cretaceous Aitym Formation, Kyzylkum Desert, Uzbekistan". Cretaceous Research. 24 (2): 171–191. doi:10.1016/S0195-6671(03)00037-5.
Skutschas, Pavel P.; Saburov, Pavel G.; Boitsova, Elizaveta A.; Kolchanov, Veniamin V. (2019). "Ontogenetic changes in long-bone histology of the cryptobranchid Eoscapherpeton asiaticum (Amphibia: Caudata) from the Late Cretaceous of Uzbekistan". Comptes Rendus Palevol. 18 (3): 306–316. doi:10.1016/j.crpv.2019.02.002.