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词条 Ilek Formation
释义

  1. Fauna

  2. See also

  3. References

{{Infobox rockunit
| name = Ilek Formation
| image =
| caption =
| type = Geological formation
| age = Lower Cretaceous {{fossilrange|Berriasian|Albian|}}
| period = Early Cretaceous
| prilithology = Clay, siltstone
| otherlithology = Marl, sandstone
| namedfor =
| namedby = L. A. Ragozin
| year_ts = 1935
| region = Western Siberia
| country = {{flag|Russia}}
| coordinates = {{coord|55.9|N|88.0|E|display=inline,title}}
| paleocoordinates = {{coord|54.2|N|84.6|E|display=inline}}
| unitof = Kiya River Basin
| subunits =
| underlies = Kiya Formation
| overlies = Tyazhin Formation
| thickness = Up to {{Convert|746|m|ft|-1}}
| extent = {{flag|Kemerovo Oblast}}
| area =
| map = {{Location map+ | Russia
| relief = 1
| width = 300
| float = center
| places =
| lat_deg = 55.9
| lon_deg = 88.0
| mark = Green pog.svg
| marksize = 10
}}
| map_caption =
}}

The Ilek Formation is a Lower Cretaceous geologic formation in Western Siberia. Many different fossils have been recovered from the formation. It overlies the Late Jurassic Tyazhin Formation and underlies the Albian Kiya Formation.[1]

The formation was described by L. A. Ragozin in 1935. It consists of sands with sandstone concretions, layers of silts, clays and marls. Age of the formation, according to a crude 1962 estimate, is Valanginian(?) - Hauterivian - Barremian. Its thickness varies greatly, reaching 746 m in Teguldet borehole.[3]

Fauna

Avialans reported from the Ilek Formation
Genus Species Location Stratigraphic position Material Notes Images
Evgenavis[2]E. nobilisSiberiaa set of limb elementsA confuciusornithiform
Mystiornis[3] M. cyrili Western SiberiaShestakovo-1 localityIsolated metatarsusAn avisaurid enantiornithean
Dinosaurs reported from the Ilek Formation
Genus Species Location Stratigraphic position Material Notes Images
Psittacosaurus[4]P. sibiricus Western SiberiaShestakovoSeveral skeletonsA ceratopsian
Sibirotitan[5]S. astrosacralisWestern Siberiavertebrae, sacrum, and previously published pedal elementsA somphospondyli
Crocodylomorphs reported from the Ilek Formation
Genus Species Location Stratigraphic position Material Notes Images
Kyasuchus[6]K. saeviSiberiaa partial skulla shartegosuchid crocodyliform
Tagarosuchus[7]T. kulemziniSouthern SiberiaShestakovoNearly complete skullA crocodyliform
G. borissiaki[11]
Mammaliaformes reported from the Ilek Formation
Genus Species Location Stratigraphic position Material Notes Images
Acinacodus[8]A. tagaricusWestern Siberiaright dentary fragmentAn amphidontid mammal
Baidabatyr[9]B. clivosusSiberiaBol'shoi Kemchug 3 localityupper premolara multituberculate
GobiconodonG. hoburensis[10]Siberia21 upper and lower jaws. A gobiconodont
Siberia1 fragmentary lower jawA gobiconodont
Kemchugia[12]K. magnaa tootha amphilestid mammal
Kiyatherium[13]K. cardiodensWestern Siberiaa maxillaa zhangheotheriid mammal
Sibirotherium[14]S. rossicusSiberialower jaw fragmentsA docodont mammaliaform
Xenocretosuchus[15]X. sibiricusSiberiaDental elementsA tritylodont mammaliaform
Yermakia[12]Y. domitorSiberiaShestakovo-1 localitya mandiblea tinodontid mammal
Amphibians reported from the Ilek Formation
Genus Species Location Stratigraphic position Material Notes Images
KiyatritonK. leshchinskiyiWestern Siberiaa set of vertebraeA salamander
Lizards reported from the Ilek Formation
Genus Species Location Stratigraphic position Material Notes Images
Ilekia[16]I. sibiricaWestern SiberiaBol'shoi Kemchug 3 localityA member of paramacellodidae
ShestakoviaS. voronkevichiWestern SiberiaBol'shoi Kemchug 3 localityA knob-scaled lizard

See also

{{Portal|Earth sciences|Paleontology|Cretaceous|Prehistory of Asia}}
  • List of pterosaur-bearing stratigraphic units

References

1. ^{{Cite journal|last=Golovneva|first=L. B.|last2=Shchepetov|first2=S. V.|date=April 2010|title=Phytostratigraphy of Albian-Cenomanian sediments in the Kiya River basin (the Chulym-Yenisei area of the west Siberian lowland)|journal=Stratigraphy and Geological Correlation|volume=18|issue=2|pages=153–165|doi=10.1134/s0869593810020048|issn=0869-5938}}
2. ^O'Connor, JL; Averianov, AO; Zelenkov, NV (2014). "A confuciusornithiform (Aves, Pygostylia)-like tarsometatarsus from the Early Cretaceous of Siberia and a discussion of the evolution of avian hind". Journal of Vertebrate Paleontology. 34 (3): 647–656. doi:10.1080/02724634.2013.828734.
3. ^Evgeny N. Kurochkin; Nikita V. Zelenkov; Alexandr O. Averianov; Sergei V. Leshchinskiy (2011). "A new taxon of birds (Aves) from the Early Cretaceous of Western Siberia, Russia". Journal of Systematic Palaeontology. 9 (1): 109–117. doi:10.1080/14772019.2010.522202.
4. ^Averianov, Alexander O.; Voronkevich, Alexei V.; Leshchinskiy, Sergei V.; Fayngertz, Alexei V. (2006). "A ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of West Siberia, Russia and its phylogenetic relationships". Journal of Systematic Palaeontology. 4 (4): 359–395. doi:10.1017/s1477201906001933.
5. ^Alexander Averianov; Stepan Ivantsov; Pavel Skutschas; Alexey Faingertz; Sergey Leshchinskiy (2018). "A new sauropod dinosaur from the Lower Cretaceous Ilek Formation, Western Siberia, Russia". Geobios. in press. doi:[https://www.sciencedirect.com/science/article/pii/S0016699517301080?via%3Dihub 10.1016/j.geobios.2017.12.004].
6. ^Efimov, M. B. and Leshchinskiy, S. V. (2000). First finding of the fossil crocodile skull in Siberia [in Russian]. In: Komarov, A. V., ed., Materialy regional’noj konferencii geologov Sibiri, Dal’nego Vostoka i Severo−Vostoka Rossii. Tom II, 361–363. GalaPress, Tomsk.
7. ^Fiorelli, L.E.; Calvo, J.O. (2007). "The first "protosuchian" (Archosauria: Crocodyliformes) from the Cretaceous (Santonian) of Gondwana" (PDF).
8. ^A. V. Lopatin; E. N. Maschenko & A. O. Averianov (2010). "A new genus of triconodont mammals from the Early Cretaceous of Western Siberia". Doklady Biological Sciences. 433 (1): 282–285. doi:[https://www.ncbi.nlm.nih.gov/pubmed/20711878 10.1134/S0012496610040137].
9. ^Alexander Averianov; Alexey Lopatin; Pavel Skutschas; Stepan Ivantsov; Elizaveta Boitsova; Ivan Kuzmin (2017). "An enigmatic multituberculate mammal from the Early Cretaceous of Siberia, Russia". Journal of Vertebrate Paleontology. 37 (2): e1293070. doi:10.1080/02724634.2017.1293070.
10. ^Trofimov, B. A. (1978). "The first triconodonts (Mammalia, Triconodonta) from Mongolia". Doklady Akademii Nauk SSSR. 243 (1): 213–216.
11. ^Maschenko, E. N.; Lopatin, A. V. (1998). "First record of an Early Cretaceous triconodont mammal in Siberia". Bull. Inst. R. Sci. Nat. Belg. 68: 233–236.
12. ^1 A. V. Lopatin, E. N. Maschenko, A. O. Averianov, A. S. Rezvyi, P. P. Skutschas and S. V. Leschinskiy. 2005. Early Cretaceous Mammals from Western Siberia: 1. Tinodontidae. Paleontological Journal 39(5):523-534
13. ^E. N. Maschenko and A. V. Lopatin. 2002. A new Early Cretaceous mammal from Western Siberia. Doklady Biological Sciences 386:475-477
14. ^http://zmmu.msu.ru/rjt/articles/article.php?volume=1&issue=2&pages=75-81
15. ^http://fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=254183
16. ^A. O. Averianov, P. P. Skutschas, A. V. Lopatin, S. V. Leschinskiy, A. S. Rezvyi and A. V. Fayngerts. 2005. Early Cretaceous mammals from Bol'shoi Kemchug 3 locality in West Siberia, Russia. Russian Journal of Theriology 4(1):1-12
17. ^1 {{cite book |title=Биостратиграфия мезозойских и третичных отложений Западной Сибири |editor = Лебедев И. В. |date=1962 |pages = 168–169 |url=https://books.google.com/books?id=RsybbAazcSAC&pg=PA168&dq=Илекская}}
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}}{{geologic-formation-stub}}

6 : Geologic formations of Russia|Lower Cretaceous Series of Asia|Cretaceous Russia|Siltstone formations|Paleontology in Russia|Geology of Siberia
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