Panchet Formation

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

Panchet Formation
Stratigraphic range: Early Triassic, Induan
TypeGeological formation
UnderliesSupra Panchet Formation
OverliesRaniganj Formation
Location
Coordinates23°36′N 87°00′E / 23.6°N 87.0°E / 23.6; 87.0
Approximate paleocoordinates55°30′S 60°12′E / 55.5°S 60.2°E / -55.5; 60.2
RegionWest Bengal, Jharkhand
Country India

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.
L. cf. curvatusA lystrosaurid dicynodont.
L. cf. declivisA lystrosaurid dicynodont.
PanchetocynodonP. damodarensisA cynodont of uncertain affinity.
Thrinaxodon


T. bengalensis (nomen nudum, lost specimen)

A thrinaxodontid cynodont.

Amphibians

GenusSpeciesLocationStratigraphic positionMaterialNotesImages
?Benthosuchidae indet.
CapulomalaC. panchetensisA plagiosaurid temnospondyl.
Gonioglyptus

G. fragilis

A trematosaurid temnospondyl.
G. longirostris
IndobrachyopsI. panchetensisA rhytidosteid temnospondyl.
IndolyrocephalusI. huxleyiA trematosaurid.
LydekkerinaL. sp.A lydekkerinid temnospondyl.
PachygoniaP. incurvataPossibly a brachyopid temnospondyl.
ManubrantliaM. khakiA lapillopsid temnospondyl
TupilakosaurusT. spA tupilakosaurid temnospondyl.

Reptiles

GenusSpeciesLocationStratigraphic positionMaterialNotesImages
SamsarasuchusS. pamelaeA proterosuchid archosauriform.
?"Teratosaurus"T. bengalensisA dubious archosauriform represented by a single tooth, formerly considered a rauisuchian but most likely a proterosuchid.[3]
AnkistrodonA. 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