Serra da Galga Formation

The Serra da Galga Formation is a geological formation in Minas Gerais state of southeastern Brazil. Its strata date back to the Maastrichtian, and are part of the Bauru Group.^[1] It was originally considered a member of the Marília Formation.^[2]

Serra da Galga Formation
Stratigraphic range: Maastrichtian ~70–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Unit of	Bauru Group
Overlies	Uberaba Formation Adamantina Formation
Lithology
Primary	Sandstone
Other	Mudstone, siltstone, limestone, paleosol
Location
Coordinates	19.6°S 48.0°W / -19.6; -48.0
Approximate paleocoordinates	23.1°S 33.9°W / -23.1; -33.9
Region	Minas Gerais
Country	Brazil
Extent	Bauru Sub-basin, Paraná Basin
Type section
Named for	Serra da Galga
Serra da Galga Formation (Brazil)

Dinosaur remains are among the fossils that have been recovered from the formation.^[3]

Fossil content

Crurotarsans

Crocodylomorphs of the Marilia Formation
Genus	Species	Location	Notes	Images
Itasuchus	I. jesuinoi	Area 2	Basal notosuchian[4]
Labidiosuchus	L. amicum	Serra do Veadinho, Area 2	A notosuchian with bizarre dentition[5]
Peirosaurus	P. torminni	Area 2	A peirosaurid[4]
Uberabasuchus	U. terrificus	Serra do Veadinho, Area 2	A peirosaurid[4]

Ornithodirans

Three distinct titanosaurids denoted as forms A, B, and C have been found in Area 4.^[4] Titanosaurine remains are known from Areas 1 and 2.^[4] Indeterminate theropod remains known from Area 1.^[4] Indeterminate maniraptor remains known from Area 1.^[4] Indeterminate abelisaurid remains are known from Areas 1 and 2.^[4] Indeterminate Carcharodontosaurid remains are known from Area 1.^[4]

Dinosaurs of the Marilia Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Aeolosaurus[4]	Indeterminate				A titanosaurian[4]
Baurutitan	B. britoi	Area 1			A titanosaurian[4]
Titanosauria	indet.	BR-050 Km 153-153.5, Ponto 1		Isolate teeth.[6]	Three morphotypes; one is one of the largest known titanosaurs and two are possible juveniles.[6]
Caieiria	C. allocaudata	Caieira			A titanosaurian[7]
"Lopasaurus"[8]	None given				A dromaeosaur. The holotype went missing shortly after 1980 and it has not been recovered since[8]
Trigonosaurus	T. pricei	Area 1			A titanosaurian[4] Possibly synonymous with Baurutitan.[7]
Uberabatitan[9]	U. ribeiroi				A titanosaurian[4]
Ypupiara[8]	Y. lopai				A dromeosaur[8]

See also

• Peirópolis
• List of dinosaur-bearing rock formations