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 PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Underlies	Supra Panchet Formation
Overlies	Raniganj Formation
Location
Coordinates	23.6°N 87.0°E / 23.6; 87.0
Approximate paleocoordinates	55.5°S 60.2°E / -55.5; 60.2
Region	West 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

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Lystrosaurus	L. murrayi				A lystrosaurid dicynodont. Synonyms include L. orientalis and L. rajurkari.
	L. cf. curvatus				A lystrosaurid dicynodont.
	L. cf. declivis				A lystrosaurid dicynodont.
Panchetocynodon	P. damodarensis				A cynodont of uncertain affinity.
Thrinaxodon	T. bengalensis				A thrinaxodontid cynodont.	Considered a nomen nudum. The specimen is lost.

Amphibians

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
?Benthosuchidae indet.
Capulomala	C. panchetensis				A plagiosaurid temnospondyl.
Gonioglyptus	G. fragilis				A trematosaurid temnospondyl.
	G. longirostris
Indobrachyops	I. panchetensis				A rhytidosteid temnospondyl.
Indolyrocephalus	I. huxleyi				A trematosaurid.
Lydekkerina	L. sp.				A lydekkerinid temnospondyl.
Pachygonia	P. incurvata				Possibly a brachyopid temnospondyl.
Manubrantlia	M. khaki				A lapillopsid temnospondyl
Tupilakosaurus	T. sp				A tupilakosaurid temnospondyl.

Reptiles

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Samsarasuchus	S. pamelae				A proterosuchid archosauriform.
?"Teratosaurus"	T. bengalensis				A dubious archosauriform represented by a single tooth, formerly considered a rauisuchian but most likely a proterosuchid.[3]
Ankistrodon	A. indicus				Dubious proterosuchid.
Neodiapsida indet.					A non-archosauromorph diapsid, known from an ilium.[4]

Fish

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Acrolepidae indet.					An acrolepid fish.
Perleididae indet.					A perleidid fish.
Chondrichthyes indet.					A cartilaginous fish.
Ceratodontidae indet.					A ceratodontid lungfish.

See also

• Yerrapalli Formation - Middle Triassic (Anisian?) of the Pranhita–Godavari Basin
• Denwa Formation - Middle Triassic (Anisian?) of the Satpura Basin
• Tiki Formation - Late Triassic (Carnian?) of the Rewa Basin
• Lower Maleri Formation - Late Triassic (Carnian?) of the Pranhita–Godavari Basin
• Upper Maleri Formation - Late Triassic (Norian?) of the Pranhita–Godavari Basin
• Lower Dharmaram Formation - Late Triassic (Norian-Rhaetian?) of the Pranhita–Godavari Basin