Santa Maria Formation

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Santa Maria Formation
Stratigraphic range: Upper Triassic and Middle Triassic
File:FormacaoX.PNG
Santa Maria Formation. Source: UFSM
Type Geological formation
Location
Coordinates -29.695042, -53.795403
Region Bandeira do Geoparque Paleorrota.JPG Paleorrota
File:Bandeira do Rio Grande do Sul.svg Rio Grande do Sul
Country  Brazil
File:Paleorrota3.PNG
Geopark of Paleorrota

The Santa Maria Formation is a sedimentary rock formation found in Rio Grande do Sul, Brazil. It has a late Ladinian – early Carnian age (Middle – Upper Triassic), and is notable for its fossils of early dinosaurs, including the herrerasaur Staurikosaurus, the basal saurischian Teyuwasu, and the basal sauropodomorph Saturnalia.[1] It received this name because it was discovered first in the city of Santa Maria.

The distinguished English paleontologist Arthur Smith Woodward determined the age of Santa Maria Formation dated Mesozoic Era, Upper Triassic period (about 220 million years).

The Santa Maria Formation is in the geopark of Paleorrota. [2] [3]

Fauna

Vertebrates

An unnamed prosauropod species is present in Rio Grande do Sul.[1]

Vertebrates reported from the Santa Maria Formation
Genus Species Location Stratigraphic position Material Notes Images

Belesodon[4]

Rio Grande do Sul.[1]

A synapsid.
Staurikosaurus

Candelariodon[5]

C. barberenai[5]

Rio Grande do Sul.[5]

A partial mandible having some complete teeth.[5]

A cynodont.[5]

Chanaresuchus[6]

C. bonapartei[6]

Rio Grande do Sul.[6]

Disarticulated cranial and postcranial elements.[6]

A proterochampsian.[6]

Pampadromaeus[7]

P. barberenai[7]

Rio Grande do Sul.[7]
  • Upper (Alemoa Member)[7]

"ULBRA-PVT016, disarticulated partial skeleton... including most skull bones"[7]

A basal sauropodomorph dinosaur.

Polesinesuchus[8]

P. aurelioi[8]

An aetosaur.[8]

Santacruzodon[9]

S. hopsoni[9]

Rio Grande do Sul.[9]

Cranial remains.[9]

A traversodontid cynodont.[9]

Saturnalia[1]

S. tupinquim[1]

Rio Grande do Sul.[1]
  • Upper (Alemoa Member)[10]

"[Three] partial skeletons, dentary, adult."[11][12]

A basal sauropodomorph dinosaur.

Spondylosoma[1]

S. absconditum[1]

Rio Grande do Sul.[1]

"Various postcranial remains."[11]

Might not be dinosaurian.[1]

Staurikosaurus[1]

S. pricei[1]

Rio Grande do Sul.[1]
  • Upper (Alemoa Member)[11]

"Partial postcranial skeleton with mandible."[11]

A herrerasaurid dinosaur.

Teyuwasu[1]

T. barbarenai[1]

Rio Grande do Sul.[1]
  • Upper (Alemoa Member)

"Right femur and tibia."[11]

Might not be dinosaurian.[1]

Trucidocynodon

T. riograndensis

A synapsid.

Formations

Geological formations in Rio Grande do Sul:
1) Serra Geral Formation, Cretaceous. 2) Botucatu Formation, Cretaceous. 3) Guará Formation, Jurassic. 4) Santa Maria Formation e Caturrita Formation, Triassic. 5) Sanga do Cabral Formation, Triassic. 6) Piramboia Formation, Permian. 7) Itararé Group, Permian.

 

See also

Footnotes

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 Weishampel, David B; et al (2004). "Dinosaur distribution (Late Triassic, South America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 527–528. ISBN 0-520-24209-2.
  2. ↑ Formação Santa Maria, (in Portuguese)
  3. ↑ Paleoformações, (in Portuguese)
  4. ↑ Romer, A. S. The Brazilian cynodont reptiles Belesodon and Chiniquodon. Breviora, 1969a, 332, 1–16. Online: Biodiversity Heritage Library
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 6.2 6.3 6.4 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 7.2 7.3 7.4 Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ 8.0 8.1 8.2 Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ 9.0 9.1 9.2 9.3 9.4 Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Langer, M.C., Abdala, F., Richter, M., and Benton, M. (1999). "A sauropodomorph dinosaur from the Upper Triassic (Carnian) of southern Brazil." Comptes Rendus de l'Académie des Sciences, 329: 511-;517.
  11. ↑ 11.0 11.1 11.2 11.3 11.4 11.5 "Table 2.1," in Weishampel, et al. (2004). Page 26.
  12. ↑ "Table 12.1," in Weishampel, et al. (2004). Page 235.

References

  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.

Triassic Period
Lower/Early Triassic Middle Triassic Upper/Late Triassic
Induan |Olenekian Anisian | Ladinian Carnian | Norian
Rhaetian


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