Quiricó Formation
Geological formation in Brazil
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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, ~[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 |
| Approximate paleocoordinates | 17.5°S 11.9°W |
| 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
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaurs
Sauropods
| Sauropods of the Quiricó Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Rebbachisauridae indet.[3] | Indeterminate | Vertebral fragments. | ||||
| Tapuiasaurus[4] | T. macedoi | Partial articulated specimen including complete skull. | A titanosaurian sauropod. | |||
Theropoda
| Theropods of the Quiricó Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Abelisauridae indet.[3] | Indeterminate | Isolated teeth. | ||||
| Carcharodontosauridae indet.[3] | Indeterminate | Isolated tooth. | ||||
| Noasauridae indet.[5] | Indeterminate | Partial right hindlimb.[6] | Undescribed. | |||
| Spectrovenator[7] | S. ragei | Partially articulated specimen including complete skull. | An abelisaurid theropod. | |||
Pterosaurs
| Pterosaurs of the Quiricó Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Ornithocheiromorpha indet.[8] | Indeterminate | Municipality of Presidente Olegário | An isolated tooth. | Probably a member of ornithocheiriformes. | ||
Crocodylomorphs
| Crocodylomorphs of the Quiricó Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Thilastikosuchus[9] | T. scutorectangularis | Articulated skull and partially articulated specimen. | A candidodontid notosuchian. | |||
Squamates
| Squamates of the Quiricó Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Cryptobicuspidon[10] | C. pachysymphysealis | Partial dentaries. | A polyglyphanodontid lizard. | |||
| Neokotus[11] | N. sanfranciscanus | Partial skeleton including skull elements. | A paramacellodid lizard. | |||
Crustaceans
| Crustaceans of the Quiricó Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Alicenula[12] | A. longiformis | A ostracod. | ||||
| Penthesilenula[12] | P. pintoi | A ostracod. | ||||
| Platyestheria[13] | P. abaetensis | A clam shrimp. | ||||
| Timiriasevia[12] | 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[14][15] | F. moraesi | A chanid fish. | ||||
| Laeliichthys[16] | L. ancentralis | An osteoglossomorph fish. | ||||
| Dipnoi Indet. | Indeterminate | |||||
| Hybodontiformes Indet. | Indeterminate | |||||
| Lepisosteidae Indet. | Indeterminate | |||||
| Mawsonia | M. gigas | A mawsoniid coelacanth | ||||
| Semionotiformes Indet. | Indeterminate | |||||
| Tribodus | T. sp. | A hybodont | ||||
| Lonchidionoides[17] | L.sp. | 9 isolated teeth | ||||