The Bukobay Svita (also anglicized as Bukobay or Bukobai Formation) is a Middle Triassic geological unit in Russia.Bukobay Formation at Fossilworks.orgBukobai Formation at Fossilworks.orgBukobaiskaya Suite at Fossilworks.org It is composed primarily of red or grey lacustrine sediments, reconstructing a humid and marshy depositional environment. Bukobay is the youngest section of a Triassic terrestrial succession exposed south of the Ural Mountains. It is equivalent to a biostratigraphic unit, the Bukobay Gorizont, which is also called the "Bukobay Horizon" or "Mastodonsaurus" fauna).

Fossil content Notable components of the Bukobay fauna include Mastodonsaurus torvus (a giant capitosaur amphibian), Malutinisuchus gratus, Plagiosternum danilovi, Synesuchus muravjevi, Jushatyria vjushkovihttps://www.researchgate.net/publication/340926822_Samyj_molodoj_triasovyj_kompleks_nazemnyh_pozvonocnyh_v_Rossii_sostav_i_datirovka and Energosuchus garjainovi, the insects Mesoneta uralensis and Triassomachilis uralensis, Elatosaurus facetus, dicynodonts Planitorostris pechoriensis, Elephantosaurus jachimovitschi (a large dicynodont), and Chalishevia cothurnata (the youngest known erythrosuchid). Temnospondyls include Bukobaja enigmatica, Plagioscutum caspiense and Plagiorophus paraboliceps, with Ceratodus orenburgensis, C. jecticristatus and C. bucobaensis as fish. The flora is also diverse, including Equisetites arenaceus (a species of giant horsetails), ferns Cladophlebis shensiensis, Danaeopsis rarinervisand, Lepidopteris microcellularis, ginkgophytes Sphenobaiera granulifer, Glossophyllum sp., cycadophytes Apoldia surakaica and Ladinian-age palynomorphs.Tverdokhlebov et al., 2003Tverdokhlebov et al., 2020 Also found in the formation were unidentified species from the genus Mastodonsaurus sp., Cyclotosaurus sp., Pistosaurus sp., Bukobaja sp. and Chalishevia sp., as well as remains from the order Theriodontia indet., Kannemeyeroidea indet. and Mastodonsauridae indet..

See also

Triassic land vertebrate faunachrons Donguz Formation, underlying fossiliferous formation in Russia Erfurt Formation, contemporaneous fossiliferous formation in Germany Wetterstein Formation, contemporaneous fossiliferous formation of the Alps Omingonde Formation, contemporaneous fossiliferous formation of Namibia Santa Maria Formation, contemporaneous fossiliferous formation of Brazil

References

Bibliography

Further reading I. A. Dobruskina. 1982. Triassic Floras of Eurasia. Akademia Nauk SSSR, Transactions 365:1-196