Kota Formation

The Kota Formation is a geological formation in India. The precise age of Kota Formation are uncertain, but it dates from the Early to Middle Jurassic, and is split into a Lower Member and Upper Member.[1] The lower member is thought to be Hettangian-Pliensbachian.[2] While the upper unit is thought to be Toarcian, but may possibly extend into the Aalenian.[3] It conformably overlies the Dharmaram Formation which is Late Triassic to earliest Jurassic and is unconformably overlain by the Early Cretaceous Gangapur Formation. The lower member is approximately 100 m thick while the upper member is 490 m thick. Both subunits primarily consist of mudstone and sandstone, but near the base of the upper unit there is a 20-30 metre thick succession of limestone deposited in a freshwater setting.[4]

Kota Formation
Stratigraphic range: Early-Mid Jurassic
~
TypeGeological formation
Sub-unitsLower & Upper members
UnderliesUnconformity with the Gangapur Formation
OverliesDharmaram Formation
Thickness550–600 m (1,800–1,970 ft)
Lithology
PrimaryMudstone, sandstone
OtherLimestone
Location
Coordinates18.9°N 80.0°E / 18.9; 80.0
Approximate paleocoordinates31.6°S 31.9°E / -31.6; 31.9
RegionTelangana
Country India
ExtentPranhita-Godavari Basin
Type section
Named forKota Village
Kota Formation (India)

Fossil content

Vertebrates

Indeterminate thyreophoran remains geographically present in Telangana State, India. These were given the name Andhrasaurus by Roman Ulansky in 2014.[2]

Ornithodires
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Barapasaurus B. tagorei Telangana State Lower Member "Scattered remains of more than [six] partial skeletons without skulls, manus, or pes." [2][5]
Campylognathoides C. indicus Chanda District, Deccan "Remains likely belonged to a fish instead of a pterosaur." [6]
Dandakosaurus D. indicus "Proximal pubis."[7] [2]
Kotasaurus K. yamanpaliensis[2] Telangana State[2] Lower Member "Nearly complete skeleton without skull."[8] [2]
Lepidosaurians
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Bharatagama B. rebbanensis Jaw fragments Lizard
Paikasisaurus P. indicus Lizard
Rebbanasaurus R. jaini Rhynchocephalia
Godavarisaurus G. lateefi Rynchocephalia
Testudinatans
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Indochelys[9] I. spatulata 3 km NNE of Kistapur village, Pranhita River, Kota Upper member Carapace fragments[10] Mesochelydian stem-turtle
Mammaliaformes
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Paikasigudodon P. yadagirii
Dyskritodon D. indicus
Trishulotherium T. kotaensis
Nakunodon N. paikasiensis
Indobaatar I. zofiae
Gondtherium[1] B. dattai[1]
Kotatherium[11] K. haldanei[11]
Indotherium.[12] I. pranhitai[12]

Invertebrates
Insects[13][14]
Genus Species Location Stratigraphic position Material Notes
Archimesoblatta A. shiva Tasch outcrop K-2 bed 8 Right forewing tegmen A mesoblattinid cockroach

Kotaphialtites

K. frankmortoni

Sirpur Taluka, Tasch's K1 outcrop bed 2(A)

An ephialtitid hymenopteran.

Taschigatra

T. bharataja

Sirpur Taluka, Tasch's K1 outcrop bed 3(A)

A rhagionid dipteran.

T. tulyabhijana

Sirpur Taluka, Tasch's K1 outcrop bed 2(A)

A rhagionid dipteran.

Xyelula

X. alexandri

Kota Formation outcrop K-2

A sepulcid hymenopteran.

Protogryllus P. (Protogryllus) lakshmi Kota Formation outcrop K-2 A protogryllid cricket

See also

References
  1. Prasad GVR, and Manhas BK. 2007. A new docodont mammal from the Jurassic Kota Formation of India. Palaeontologia electronica, 10.2: 1-11
  2. Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Jurassic, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 534–535. ISBN 0-520-24209-2.
  3. Bandyopadhyay, Saswati; Gillette, David D.; Ray, Sanghamitra; Sengupta, Dhurjati P. (2010-03-19). "Osteology of Barapasaurus tagorei (Dinosauria: Sauropoda) from the Early Jurassic of India: OSTEOLOGY OF BARAPASAURUS TAGOREI". Palaeontology. 53 (3): 533–569. doi:10.1111/j.1475-4983.2010.00933.x.
  4. Goswami, Suparna; Gierlowski-Kordesch, Elizabeth; Ghosh, Parthasarathi (January 2018). "Sedimentology of the Early Jurassic limestone beds of the Kota Formation: record of carbonate wetlands in a continental rift basin of India". Journal of Paleolimnology. 59 (1): 21–38. doi:10.1007/s10933-016-9918-y. ISSN 0921-2728. S2CID 133167210.
  5. "Table 13.1," in Weishampel, et al. (2004). Page 263.
  6. Wellnhofer, Peter (1991). "Summary of Lower Jurassic Pterosaurs." The Illustrated Encyclopedia of Pterosaurs. London, UK: Salamander Books Limited. p. 79. ISBN 0-86101-566-5.
  7. "Table 4.1," in Weishampel, et al. (2004). Page 78.
  8. "Table 13.1," in Weishampel, et al. (2004). Page 261.
  9. Datta, P.M.; Manna, P.; Ghosh, S.C.; Das, D. P. (April 2000). "The First Jurassic turtle from India". Palaeontology. 43 (1): 99–109. doi:10.1111/1475-4983.00120. ISSN 0031-0239.
  10. Joyce, Walter G.; Bandyopadhyay, Saswati (2020-02-11). "A reevaluation of the basal turtle Indochelys spatulata from the Early–Middle Jurassic (Toarcian–Aalenian) of India, with descriptions of new material". PeerJ. 8: e8542. doi:10.7717/peerj.8542. ISSN 2167-8359. PMC 7020818. PMID 32095362.
  11. Datta PM. 1981. The first Jurassic mammal from India. Zoological Journal of the Linnean Society of London, 73:307-312
  12. Yadagiri P. 1984. New symmetrodonts from Kota Formation (Early Jurassic), India. Journal of the Geological Society of India, 25:514-621
  13. Mostovski M.B., Jarzembowski E.A. 2000. The first brachycerous flies (Diptera: Rhagionidae) from the Lower Jurassic of Gondwana. Paleontological Journal 34 (Suppl. 3): 367-369.
  14. Rasnitsyn A.P. 2008. New hymenopteran insects (Insecta: Vespida) from the Lower or Middle Jurassic of India. Paleontological Journal 42 (1): 81-85. Archived 2008-11-21 at the Wayback Machine
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.