Panchet Formation

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Panchet Formation
Stratigraphic range: Early Triassic, Induan
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Type Geological formation
Underlies Supra Panchet Formation
Overlies Raniganj Formation
Location
Coordinates 23°36′N87°00′E / 23.6°N 87.0°E / 23.6; 87.0
Approximate paleocoordinates 55°30′S60°12′E / 55.5°S 60.2°E / -55.5; 60.2
Region West Bengal, Jharkhand
Country India

The Panchet Formation is an Early Triassic geological formation from the Damodar Valley of India. [1] [2]

Contents

It is among the few geological formations outside of Russia, South Africa, and China that documents the recovery of global ecosystems immediately after the Permian-Triassic extinction. It shares similar traits to some of these other formations, including the dominance of Lystrosaurus and the primary predators being proterosuchid reptiles. It also preserves a diversity of temnospondyl amphibians. [3] [4]

Palaeobiota

Synapsids

GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Lystrosaurus

L. murrayi

A lystrosaurid dicynodont. Synonyms include L. orientalis and L. rajurkari. Lystrosaurus BW.jpg
L. cf. curvatusA lystrosaurid dicynodont.
L. cf. declivisA lystrosaurid dicynodont.
Panchetocynodon P. damodarensisA cynodont of uncertain affinity.
Thrinaxodon

T. bengalensis

A thrinaxodontid cynodont.Considered a nomen nudum. The specimen is lost.

Amphibians

GenusSpeciesLocationStratigraphic positionMaterialNotesImages
?Benthosuchidae indet.
Capulomala C. panchetensisA plagiosaurid temnospondyl.
Gonioglyptus

G. fragilis

A trematosaurid temnospondyl.
G. longirostris
Indobrachyops I. panchetensisA rhytidosteid temnospondyl. Indobrachyops panchetensis.jpg
Indolyrocephalus I. huxleyiA trematosaurid.
Lydekkerina L. sp.A lydekkerinid temnospondyl. Lyddekerina1db.jpg
Pachygonia P. incurvataPossibly a brachyopid temnospondyl.
Manubrantlia M. khakiA lapillopsid temnospondyl Manubrantlia jaws.png
Tupilakosaurus T. spA tupilakosaurid temnospondyl. Tupilakosaurus.jpg

Reptiles

GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Samsarasuchus S. pamelaeA proterosuchid archosauriform.
 ?" Teratosaurus "T. bengalensisA dubious archosauriform represented by a single tooth, formerly considered a rauisuchian but most likely a proterosuchid. [3]
Ankistrodon A. indicusDubious proterosuchid.
Neodiapsida indet.A non-archosauromorph diapsid, known from an ilium. [4]

Fish

GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Acrolepidae indet.An acrolepid fish.
Perleididae indet.A perleidid fish.
Chondrichthyes indet.A cartilaginous fish.
Ceratodontidae indet.A ceratodontid lungfish.

See also

References

  1. Romano, Marco; Bernardi, Massimo; Petti, Fabio Massimo; Rubidge, Bruce; Hancox, John; Benton, Michael J. (2020). "Early Triassic terrestrial tetrapod fauna: a review" . Earth-Science Reviews. 210: 103331. doi:10.1016/j.earscirev.2020.103331.
  2. Bandyopadhyay, Saswati; Ray, Sanghamitra (2020-03-01). "Gondwana Vertebrate Faunas of India: Their Diversity and Intercontinental Relationships". Episodes. 43 (1): 438–460. doi: 10.18814/epiiugs/2020/020028 . ISSN   0705-3797.
  3. 1 2 Ezcurra, Martín D.; Bandyopadhyay, Saswati; Sengupta, Dhurjati P.; Sen, Kasturi; Sennikov, Andrey G.; Sookias, Roland B.; Nesbitt, Sterling J.; Butler, Richard J. (25 October 2023). "A new archosauriform species from the Panchet Formation of India and the diversification of Proterosuchidae after the end-Permian mass extinction". Royal Society Open Science. 10 (10). doi:10.1098/rsos.230387. ISSN   2054-5703. PMC   10598453 . PMID   37885992.
  4. 1 2 Ezcurra, Martín D.; Bandyopadhyay, Saswati; Sen, Kasturi (March 2022). "A new faunistic component of the Lower Triassic Panchet Formation of India increases the continental non-archosauromorph neodiapsid record in the aftermath of the end-Permian mass extinction" . Journal of Paleontology. 96 (2): 428–438. doi:10.1017/jpa.2021.100. ISSN   0022-3360.