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 (4,900ft) thick Sangar Series within the Vilyuy syneclise. The mudstones, sandstones and shales of the formation were deposited in a fluvial to lacustrine environment.

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:

Mammaliaformes

• Cryoharamiya tarda
• Khorotherium yakutensis
• Sangarotherium aquilonium
• Xenocretosuchus kolossovi
• Gobiconodon sp.
• cf. Sineleutherus sp.
• Docodonta indet.
• Tritylodontidae indet.

Reptiles

• Khurendukhosaurus sp.
• Ankylosauria indet.
• Coelurosauria indet.
• Euhelopodidae
• Lacertilia indet.
• Macronaria indet.
• Mesochelydia indet.
• Reptilia indet.
• Stegosauria indet.
• Theropoda indet.

Amphibians

• Kulgeriherpeton ultimus
• Anura indet.
• Caudata indet.

Fish

• Chondrostei indet.
• Palaeoniscidae indet.

Insects

• Crenoptychoptera gronskayae
• Zhiganka comitans

Bivalves

• Bivalvia indet.

Gastropods

• Gastropoda indet.

Flora

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

Bibliography

• 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:
• 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:, doi:{{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), , Lethaia, 53 (3): 362–368, doi:
• 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:, doi:, ISSN, PMC, PMID
• Skutschas, P.P.; Kolchanov, V.V.; Averianov, A.O.; Martin, T.; Schellhorn, R.; Kolosov, P.N.; Vitenko, D.D. (2018), , Acta Palaeontologica Polonica, 63: 519–525, doi:
• 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:, doi:
• Lopatin, Alexey; Agadjanian, A. (2008), , Doklady Biological Sciences, 419: 107–110, doi:, PMID
• Lukashevich, E.D (1995), "First pupae of the Eoptychopteridae and Ptychopteridae from the Mesozoic of Siberia (Insecta: Diptera)", Paleontological Journal, 29: 164–171

Further reading

• 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