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 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:Batylykh Formation at Fossilworks.org Mammaliaformes Cryoharamiya tardaAverianov et al., 2020 Khorotherium yakutensis Sangarotherium aquilonium Xenocretosuchus kolossovi Gobiconodon sp. cf. Sineleutherus sp. Docodonta indet. Tritylodontidae indet.Lopatin & Agadjanian, 2008 Reptiles Khurendukhosaurus sp. Ankylosauria indet. Coelurosauria indet. Euhelopodidae Lacertilia indet. Macronaria indet. Mesochelydia indet.Skutschas et al., 2020 Reptilia indet. Stegosauria indet. Theropoda indet. Amphibians Kulgeriherpeton ultimusSkutschas et al., 2018 Anura indet. Caudata indet. Fish Chondrostei indet. Palaeoniscidae indet. Insects Crenoptychoptera gronskayaeLukashevich, 1995 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.
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See also List of fossiliferous stratigraphic units in Russia Bukachacha Formation, contemporaneous fossiliferous formation of Zabaykalsky Krai
References
Bibliography
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