Batylykh Formation

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°42′N 117°36′E / 62.7°N 117.6°E / 62.7; 117.6
Approximate paleocoordinates	66°30′N 110°06′E / 66.5°N 110.1°E / 66.5; 110.1
Region	Yakutia
Country	Russia
Extent	Vilyuy River Basin
Batylykh Formation (Russia)

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.

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.

• 
  Dinosaur teeth
• 
  Kulgeriherpeton ultimum

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

• Averianov, Alexander O.; Martin, Thomas; Lopatin, Alexey V.; Skutschas, Pavel P.; Schellhorn, Rico; Kolosov, Petr N.; Vitenko, Dmitry D. (2020), "A new euharamiyidan mammaliaform from the Lower Cretaceous of Yakutia, Russia", Journal of Vertebrate Paleontology, 39 (6): e1762089, doi:10.1080/02724634.2019.1762089
• Skutschas, P.P.; Markova, V.D.; Kolchanov, V.V.; Averianov, A.O.; Martin, T.; Schellhorn, R.; Kolosov, P.N.; Grigoriev, D.V.; Vitenko, D.D., E. Mobraztsova and I. G. Danilov (2020), "Basal turtle material from the Lower Cretaceous of Yakutia (Russia) filling the gap in the Asian record", Cretaceous Research, x: 1–14, Bibcode:2020CrRes.10604186S, doi:10.1016/j.cretres.2019.07.016{{citation}}: CS1 maint: multiple names: authors list (link)
• Averianov, Alexander O.; Skutschas, Pavel P.; Schellhorn, Rico; Lopatin, Alexey V.; Kolosov, Petr N.; Kolchanov, Veniamin V.; Vitenko, Dmitry D.; Grigoriev, Dmitry V.; Martin, Thomas (2019), "The northernmost sauropod record in the Northern Hemisphere: Polar sauropods", Lethaia, 53 (3): 362–368, doi:10.1111/let.12362
• Averianov, Alexander; Martin, Thomas; Lopatin, Alexey; Skutschas, Pavel; Schellhorn, Rico; Kolosov, Petr; Vitenko, Dmitry (2018), Fiorillo, Anthony (ed.), "A high-latitude fauna of mid-Mesozoic mammals from Yakutia, Russia", PLoS ONE, 13 (7): e0199983, Bibcode:2018PLoSO..1399983A, doi:10.1371/journal.pone.0199983, ISSN 1932-6203, PMC 6059412, PMID 30044817
• Skutschas, P.P.; Kolchanov, V.V.; Averianov, A.O.; Martin, T.; Schellhorn, R.; Kolosov, P.N.; Vitenko, D.D. (2018), "A new relict stem salamander from the Early Cretaceous of Yakutia, Siberian Russia", Acta Palaeontologica Polonica, 63: 519–525, doi:10.4202/app.00498.2018
• Kolosov, P.N.; Ivensen, G.V.; Mikhailova, T.E.; Kurzanov, S.M.; Efimov, M.B.; Gubin, Y.M. (2009), "Taphonomy of the Upper Mesozoic Tetrapod Teete Locality (Yakutia)", Paleontological Journal, 43 (2): 201–207, Bibcode:2009PalJ...43..201K, doi:10.1134/S0031030109020129
• Lopatin, Alexey; Agadjanian, A. (2008), "A Tritylodont (Tritylodontidae, Synapsida) from the Mesozoic of Yakutia", Doklady Biological Sciences, 419: 107–110, doi:10.1134/S0012496608020117, PMID 18536275
• Lukashevich, E.D (1995), "First pupae of the Eoptychopteridae and Ptychopteridae from the Mesozoic of Siberia (Insecta: Diptera)", Paleontological Journal, 29: 164–171

• I. P. Tolmachoff. 1904. Neue Funde zur Geologie Sibiriens [New discoveries about the geology of Siberia]. Centralblatt für Mineralogie, Geologie und Paläontologie 1904(1):233-234