Santa Maria Formation

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Santa Maria Formation
Stratigraphic range: Upper Triassic and Middle Triassic
FormacaoX.PNG
Santa Maria Formation. Source: UFSM
Type Geological formation
Location
Coordinates -29.695042, -53.795403
Region Bandeira do Geoparque Paleorrota.JPG Paleorrota
 Rio Grande do Sul
Country  Brazil
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 (MiddleUpper 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[edit]

Vertebrates[edit]

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.

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[edit]

Magnify-clip.png

Geological Formations of Geopark Paleorrota:
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[edit]

Footnotes[edit]

  1. ^ a b c d e f g h i j k l m n o p q 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. ^ http://www.lenep.uenf.br/~severian/es-sm-sincro.html Formação Santa Maria, (in Portuguese)
  3. ^ http://www.pesquisasemgeociencias.ufrgs.br/arquivos/ARTIGO311.pdf Paleoformações, (in Portuguese)
  4. ^ Romer, A. S. The Brazilian cynodont reptiles Belesodon and Chiniquodon. Breviora, 1969a, 332, 1–16. Online: Biodiversity Heritage Library
  5. ^ a b c d e Téo Veiga De Oliveira, Cesar Leandro Schultz, Marina Bento Soares and Carlos Nunes Rodrigues (2011). "A new carnivorous cynodont (Synapsida, Therapsida) from the Brazilian Middle Triassic (Santa Maria Formation): Candelariodon barberenai gen. et sp. nov.". Zootaxa 3027: 19–28. ISSN 1175-5334. 
  6. ^ a b c d e Tiago Raugust, Marcel Lacerda and Cesar Leandro Schultz (in press). "The first occurrence of Chanaresuchus bonapartei Romer 1971 (Archosauriformes, Proterochampsia) of the Middle Triassic of Brazil from the Santacruzodon Assemblage Zone, Santa Maria Formation (Paraná Basin)". In S.J. Nesbitt, J.B. Desojo and R.B. Irmis (eds). Anatomy, phylogeny and palaeobiology of early archosaurs and their kin. The Geological Society of London. doi:10.1144/SP379.22. 
  7. ^ a b c d e Cabreira, Sergio F.; Cesar L. Schultz, Jonathas S. Bittencourt, Marina B. Soares, Daniel C. Fortier, Lúcio R. Silva and Max C. Langer (2011). "New stem-sauropodomorph (Dinosauria, Saurischia) from the Triassic of Brazil". Naturwissenschaften 98 (12): 1035–1040. Bibcode:2011NW.....98.1035C. doi:10.1007/s00114-011-0858-0. PMID 22083251. 
  8. ^ a b c Lúcio Roberto-da-Silva, Julia B. Desojo, Sérgio F. Cabreira, Alex S. S. Aires, Rodrigo T. Müller, Cristian P. Pacheco and Sérgio Dias-da-Silva (2014). "A new aetosaur from the Upper Triassic of the Santa Maria Formation, southern Brazil". Zootaxa 3764 (3): 240–278. doi:10.11646/zootaxa.3764.3.1. 
  9. ^ a b c d e F. Abdala and A. M. Ribeiro (2003). "A new traversodontid cynodont from the Santa Maria Formation (Ladinian-Carnian) of southern Brazil, with a phylogenetic analysis of Gondwanan traversodontids". Zoological Journal of the Linnean Society 139 (4): 529–545. doi:10.1111/j.1096-3642.2003.00096.x. 
  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. ^ a b c d e f "Table 2.1," in Weishampel, et al. (2004). Page 26.
  12. ^ "Table 12.1," in Weishampel, et al. (2004). Page 235.

References[edit]

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