Bukobay Svita
| Bukobay Svita | |
|---|---|
| Stratigraphic range: Ladinian ~ | |
 "Mastodonsaurus" torvus, an index fossil of the Bukobay Svita / Gorizont | |
| Type | Stratigraphic Formation |
| Overlies | Donguz Svita |
| Lithology | |
| Primary | Claystone, siltstone |
| Other | Sandstone |
| Location | |
| Coordinates | 51°24′N 55°30′E / 51.4°N 55.5°E |
| Approximate paleocoordinates | 35°24′N 41°00′E / 35.4°N 41.0°E |
| Region | Orenburg, Bashkortostan |
| Country |  Russia |
  Bukobay Svita (Russia) | |
The Bukobay Svita (also anglicized as Bukobay or Bukobai Formation) is a Middle Triassic geological unit in Russia.[1][2][3] 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
[edit]Notable components of the Bukobay fauna include Mastodonsaurus torvus (a giant capitosaur amphibian), Malutinisuchus gratus, Plagiosternum danilovi, Synesuchus muravjevi, Jushatyria vjushkovi[4] 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.[5][6] 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
[edit]- 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
[edit]- ^ Bukobay Formation at Fossilworks.org
- ^ Bukobai Formation at Fossilworks.org
- ^ Bukobaiskaya Suite at Fossilworks.org
- ^ https://www.researchgate.net/publication/340926822_Samyj_molodoj_triasovyj_kompleks_nazemnyh_pozvonocnyh_v_Rossii_sostav_i_datirovka
- ^ Tverdokhlebov et al., 2003
- ^ Tverdokhlebov et al., 2020
Bibliography
[edit]- Tverdokhlebov, V. P.; Sennikov, A. G.; Novikov, I. V.; Ilyina, N. V. (2020). "The Youngest Triassic Land Vertebrate Assemblage of Russia: Composition and Dating". Paleontological Journal. 54 (3): 297–310. Bibcode:2020PalJ...54..297T. doi:10.1134/S0031030120030156. S2CID 219958855.
- Tverdokhlebov, Valentin P.; Tverdokhlebova, Galina I.; Surkov, Mikhail V.; Benton, Michael J. (2003). "Tetrapod localities from the Triassic of the SE of European Russia". Earth-Science Reviews. 60 (1): 1–66. Bibcode:2003ESRv...60....1T. doi:10.1016/S0012-8252(02)00076-4.
- Schoch, R.; Milner, A. R. (2000). "Stereospondyli". Handbuch der Paläoherpetologie. 3B: 1–20.
Further reading
[edit]- I. A. Dobruskina. 1982. Triassic Floras of Eurasia. Akademia Nauk SSSR, Transactions 365:1-196