Lameta Formation

The first fossils found in the Lameta Formation were discovered between 1917 and 1919.^[2]

The Lameta Formation was first identified in 1981 by geologists working for the Geological Survey of India (GSI), G. N. Dwivedi and Dhananjay Mahendrakumar Mohabey, after being given limestone structures–later recognised as dinosaur eggs–by workers of the ACC Cement Quarry in the village of Rahioli near the city Balasinor in the Gujarat state of western India.^[3]

The formation is underlain by the Lower Cretaceous sedimentary "Upper Gondwana Sequence" also known as the Jabalpur Formation, and is overlain by the Deccan Traps basalt. The Lameta Formation is only exposed at the surface as small isolated outcrops associated with the Satpura Fault. The lithology of the formation, depending on the outcrop, consists of alternating clay, siltstone and sandstone facies, deposited in fluvial and lacustrine conditions. The environment at the time of deposition has alternatively been considered semi-arid, or tropical humid.^[4][5]

Many dubious names have been created for isolated bones, but several genera of dinosaurs from these rocks are well-supported, including the titanosaur sauropods Isisaurus and Jainosaurus and the Abelisaurs Indosaurus, Indosuchus, and Rajasaurus and the Noasaurids Laevisuchus and ‘’Jubbulpuria’’..^[6] Synapsids are also known form the formation, such as the possibly late surviving Avashishta,possibly the last known non- mammalian synapsid the possibly youngest known stegosaurian ichnogenus Deltapodus, madtsoiid snakes and other fossils.

Dinosaurs

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Ornithischians

More information Genus, Species ...

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Ankylosauria?	Indeterminate	Rahioli		Isolated vertebrae, scapulocoracoid, humerus, femur, and several armor fragments such as hollow lateral spikes and solid dorsal scutes.[7]	Described as a nodosaurid, but the limb bones are titanosaurian.[8]
Brachypodosaurus	B. gravis	Chota Simla Hill		"Humerus."[9]	May not be dinosaurian
Ceratopsia?	Indeterminate	Kheda		Horncore base.	Originally described as a ceratopsian horncore,[10] but likely represents a theropod limb element or a dorsal rib of a theropod or a titanosauriform.[11]
Deltapodus[12]	sp.	Jetholi		Solitary footprint.	A Possible Late Cretaceous Stegosaur, Like Dravidosaurus.
Hypsilophodontidae?[13]	Indeterminate.	Vikarabad.		Teeth.	Hypsilophodontidae is not a natural grouping.
Ornithischia?[14]	Indeterminate	Kheda		GSI/GC/2905	Originally identified as an indeterminate ornithischian braincase. Later found out to be a Titanosaur dorsal vertebra.[15]
Spheroolithus?	sp.	Polgaon, Tidkepar		Egg fossils.	Questionably assigned to this genus[16]

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Sauropods

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Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Isisaurus	I. colberti	Dongargaon Hill		Holotype skeleton consists of cervical, dorsal, sacral, caudal vertebrae, ribs, pelvis, scapula, coracoid, left forelimb, and other bones. Other specimens, such as the skull, hindlimb, and foot bones, are unknown.	A lithostrotian titanosaur.
Jainosaurus	J. septentrionalis	Bara Simla		"Basicranium and partial postcranial skeleton."[17]	A titanosaur
	J. cf. septentrionalis	Chhota Simla		Partial skeleton including a rib fragrement, caudal centrum, humeri, radius and an articulated left limb.[18]
Titanosaurus	T. blanfordi	Panchgaon Pisdura Hill		Caudal vertebrae.[19]	A dubious genus of titanosaur.[20]
	T. indicus	Pisdura Hill		Caudal Vertebrae, two partial rami of haemapophysis, partial left tibia, partial right fibula, and a partial referred femur.[2]
	T.? rahioliensis[21]	Rahioli Village		About 34 teeth in total.	Might not belong to this genus.
Megaloolithus[22]	M. cylindricus	Chui Hill, Bara Simla, Nand region, Pavan, Ghorpend, Bagh Caves, Dhar, Indwan, Kadwal, Dholiya Raipuriya village, Akhada village, Jhaba village, Padlya village, Jhabua, Dohad, Jhalod, Garadi, Kheda, Rahioli, Dholi Dungri.		Multiple specimens consist of fossilized egg shells that are covered in volcanic sediments	Sauropod egg fossils
	M. dhoridungriensis
	M. jabalpurensis
	M. khempurensis
	M. megadermus
	M. problematica
	M. walpurensis
	M. sp.
Titanosauriform[23]	Indeterminate	Ukala.		Dorsal vertebrae, parts of the ilia and pelvis, and limb bones.	A titanosauriform.
Sauropoda[24]	indeterminate	Rahioli		Several Humeri	The humeri ranges from 70 to 85 cm in length, they have gracility index that ranges from 73 to 78.
Titanosauria[25]	indeterminate	Temple Hill, Rahioli		disarticulated remains.	Discovered alongside the Rajasaurus holotype.

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Theropods

Abelisaurs

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Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Abelisauroidea	Indeterminate			Multiple specimens.[26]	Could be referred to Abelisauridae or Noasauridae.[27]
Abelisauridae	Indeterminate			Multiple specimens.	Include form similar to Majungasaurus and forms similar to Carnotaurus.[26]
Compsosuchus	C. solus	Bara Simla		"Vertebrae"	Previously considered a Noasaurid now considered an indeterminate Abelisaurid[28]
Indosaurus	I. matleyi	Bara Simla		Partial skeleton, including a partial skull.[29]	An abelisaurid
Dryptosauroides	D. grandis	Bara Simla		"Vertebrae."[30]	An abelisaurd
Ellipsoolithus[31]	E. khedaensis	Kheda		Eggs	Theropod egg fossils.
Indosuchus	I. raptorius	Bara Simla		Cranial remains, including two braincases, as well as a nearly complete skeleton.[29]	An abelisaurid
Ornithomimoides	O. barasimlensis	Bara Simla		"Vertebrae."[30]	An abelisaurid[32]
	O. mobilis	Bara Simla		"Vertebrae"[30]
Orthogoniosaurus	O. matleyi	Bara Simla		"Tooth"[30]	An abelisaurid[33]
Rahiolisaurus	R. gujaratensis	Rahioli Village		Cervical, dorsal, sacral, and caudal vertebrae, portions of pectoral and pelvic girdles, and several hind limb bones of different individuals.	An Abelisaurid
Rajasaurus	R. narmadensis	Temple Hill, Rahioli		A partial skeleton consists of maxillae, premaxillae, braincase, and quadrate bone on the skull; and spine, hip bone, legs, and tail in post-cranial remains.	An Abelisaurid

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Noasaurids

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Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Laevisuchus	L. indicus	Bara Simla		Only vertebrae.[29]	A noasaurid.
Noasaurinae	Indeterminate	Pisdura Hill		A partial dentary.[32]	A noasaurine noasaurid.
Noasauridae	Indeterminate			Multiple specimens.[26]	May include femora from very large individuals.[27]

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Other Theropods

More information Genus, Species ...

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Coeluroides	C. largus	Bara Simla		"Isolated vertebrae."[30]	A Indeterminate theropod also known from Dabrazhin Formation of Kazakhstan
Jubbulpuria	J. tenuis	Bara Simla		"Vertebrae."[30]	Likely junior synonym of Laevisuchus[32]
?Megalosaurus	Type A-E	Rahioli		Several teeth [21]	The overall length of the teeths ranges from 0.7 to 6 cm, all were originally identified as belonging to Megalosaurus,(beside GSI Type No. 19988 as it was identified as a Majungasaurus tooth).[21] However a specimen(GSI Type No. 19996) may instead represent a troodontid.[34]
Ornithomimidae?[35]	Indeterminate	Bara Simla			Ceratosaurian taxa from the Lameta Formation have been erroneously referred to ornithomimdae.
Theropoda	Indeterminate			GSI K27/572, fragmentary cervical vertebra.	Initially described as allosauroid. But the researchers didn't classify it as an abelisaurid, possibly representing a member of a clade outside of abelisauroidea, the preserved height of the vertebra is 16 cm.[26]
Trachoolithus[36]	T. faticanus	Bara Simla		Eggs.	Theropod egg fossils.

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Indeterminate or chimaeric taxa

More information Genus, Species ...

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
"Dubeynarainsaurus"	"D. sahni"	Sirolkhal		"Partial dentary with associated teeth."[37]	May instead be a later cretaceous pterosaur,[37] proposed to be either belonging to the Infratrappean or Intertrappean beds, although if it were a pterosaur it would not be Maastrichtian.[38]
Lametasaurus	L. indicus	Bara Simla		"Sacrum, ilia, tibia."[30] "Sacrum, ilia, tibia, spines, armor."[39]	Includes crocodylomorph, titanosaur scutes and possibly ankylosaurian osteoderms.[8] Also includes abelisaurid material now removed from the type and is being assigned to the Rajasaurus.[3]

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Reptiles

Snakes

More information Genus, Species ...

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Madtsoia	M. pisdurensis[40]	Pidura Hill	Upper		A madtsoiid snake.
Sanajeh	S. indicus	Dholi Dungri		A skull, precloaca vertebrae and ribs.	A madtsoiid snake.

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Crocodylomorphs

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Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Dyrosauridae[41][13][42]	Indeterminate.	Kisalpuri and Vikarabad.		Vertebrae, eggs and teeth.	Non-Phosphatosaurinae Dyrosaurid Crocodylomorphs.

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Turtles

More information Genus, Species ...

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Jainemys	J. pisdurensis	Pisdura hill			A bothremydid side-necked turtle.
Pelomedusidae[43][44]	Indeterminate				A turtle.

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• List of dinosaur-bearing rock formations
• Geology of India
• Deccan Traps
• Maevarano Formation, contemporaneous fossiliferous formation of Madagascar
• Intertrappean Beds contemporaneous formation in India, also known for its fossils