Batylykh Formation

The Batylykh Formation is a geological formation in Yakutia, Russia. It is of an uncertain Early Cretaceous age, probably dating between the Berriasian and the Barremian. It is the oldest unit of the 1,500 metres (4,900 ft) thick Sangar Series within the Vilyuy syneclise. The mudstones, sandstones and shales of the formation were deposited in a fluvial to lacustrine environment.

Batylykh Formation
Stratigraphic range: Early Cretaceous ?Berriasian–Barremian PreꞒ Ꞓ O S D C P T J K Pg N
Teete locality with stratigraphic column
Type	Geological formation
Unit of	Sangar Series
Underlies	Eksenyakh Formation
Lithology
Primary	Claystone, siltstone, sandstone
Location
Coordinates	62.7°N 117.6°E / 62.7; 117.6
Approximate paleocoordinates	66.5°N 110.1°E / 66.5; 110.1
Region	Yakutia
Country	Russia
Extent	Vilyuy River Basin
Batylykh Formation (Russia)

Fossil content

The formation is best known for the Teete locality, which has revealed remains of numerous vertebrates, including dinosaurs and mammals.

Fossils recovered from the formation include:^[1]

Mammaliaformes

• Cryoharamiya^[2]
• cf. Sineleutherus sp.
• Docodonta indet.
• Gobiconodon^[3]
• Sangarotherium^[3]
• Xenocretosuchus
• Khorotherium
• Tritylodontidae^[4]

Reptiles

• Khurendukhosaurus
• Ankylosauria indet.
• Coelurosauria indet.
• Lacertilia indet.
• Macronaria indet.
• Mesochelydia indet.^[5]
• Stegosauria indet.^[6]
• Theropoda indet.

Amphibians

• Kulgeriherpeton ultimus^[7]
• Anura indet.
• Caudata indet.^[8]

Fish

• Chondrostei indet.
• Palaeoniscidae indet.

Insects

• Crenoptychoptera gronskayae^[9]
• Zhiganka comitans^[9]

Bivalves

• Bivalvia indet.

Gastropods

• Gastropoda indet.

Flora

• Podocarpus multesima
• Selaginella velata
• Stereisporites compactus
• S. congregatus
• Tripartina variabilis
• Ginkgocycadophytus sp.
• Klukisporites sp.
• Leiotriletes sp.
• Ophyoglossum sp.
• Piceapollenites sp.
• Picea sp.
• Pinus sp.
• Selaginella sp.
• Stereisporites sp.
• Pinaceae indet.

Gallery

• 
  Dinosaur teeth
• 
  Kulgeriherpeton ultimum

See also

• List of fossiliferous stratigraphic units in Russia
• Bukachacha Formation, contemporaneous fossiliferous formation of Zabaykalsky Krai