Quiricó Formation

The Quiricó Formation is a geological formation of the Areado Group in Minas Gerais, Brazil whose strata date back to the Early Cretaceous (Aptian).^[2][1] Many occurrences of fossils are reported in the lacustrine deposits of the Quiricó Formation.

Quiricó Formation
Stratigraphic range: Aptian, ~125 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ [1]
Stratigraphic position of the Quiricó Formation in São Francisco Basin
Type	Geological formation
Unit of	Areado Group
Underlies	Abaeté Formation
Overlies	Três Barras Formation
Thickness	60–100 m (200–330 ft)
Lithology
Primary	Sandstone, claystone
Other	Siltstone, limestone
Location
Coordinates	16.7°S 44.4°W / -16.7; -44.4
Approximate paleocoordinates	17.5°S 11.9°W / -17.5; -11.9
Region	Minas Gerais
Country	Brazil
Extent	São Francisco Basin
Type section
Named for	Quiricó Lake/River
Named by	Barbosa
Year defined	1965
Quiricó Formation (Brazil)

Fossil content

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.

Dinosaurs

Sauropods

Sauropods of the Quiricó Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Rebbachisauridae indet.[3]	Indeterminate
Tapuiasaurus[4]	T. macedoi				A titanosaurian sauropod.

Theropoda

Theropods of the Quiricó Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Abelisauridae indet.[3]	Indeterminate
Carcharodontosauridae indet.[3]	Indeterminate
Spectrovenator[5]	S. ragei				An abelisaurid theropod.

Crocodylomorphs

Crocodylomorphs of the Quiricó Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Thilastikosuchus[6]	T. scutorectangularis				A candidodontid notosuchian

Squamates

Squamates of the Quiricó Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Cryptobicuspidon[7]	C. pachysymphysealis				A polyglyphanodontid lizard.
Neokotus[8]	N. sanfranciscanus				A paramacellodid lizard.

Crustacean

Crustacean of the Quiricó Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Alicenula[9]	A. longiformis				A ostracod.
Penthesilenula[9]	P. pintoi				A ostracod.
Platyestheria[10]	P. abaetensis				A clam shrimp.
Timiriasevia[9]	T. sanfranciscanensis				A ostracod.

Fish

Fishes of the Quiricó Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Amiidae Indet.	Ineterminate
Aspidorhynchidae Indet.	Indeterminate
Francischanos[11][12]	F. moraesi				A chanid fish.
Laeliichthys[13]	L. ancentralis				An osteoglossomorph fish.
Dipnoi Indet.	Indeterminate
Hybodontiformes Indet.	Indeterminate
Lepisosteidae Indet.	Indeterminate
Mawsonia	M. gigas				A mawsoniid coelacanth
Semionotiformes Indet.	Indeterminate