Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi
This paper focus on the first conchostracans (Crustacea, Spinicaudata) found at the São Luís outcrop (Caturrita Formation, Rosário do Sul Group), in Faxinal do Soturno, Rio Grande do Sul State, Brazil (29º33’ 29.09”S, 53º 26’ 54”W). Fossil vertebrates and plants identified at this outcrop suggest co...
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Universidade de São Paulo
2014
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ftdoajarticles:oai:doaj.org/article:5c1c050d48ef4af3af1574498b8c095b 2023-05-15T14:02:57+02:00 Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi Rosemarie Rohn Tânia Lidner Dutra Marcus Vinicius Bonafé Cabral 2014-03-01T00:00:00Z https://doi.org/10.5327/Z1519-874X201400010001 https://doaj.org/article/5c1c050d48ef4af3af1574498b8c095b EN PT eng por Universidade de São Paulo http://ppegeo.igc.usp.br/pdf/guspsc/v14n1/a01v14n1.pdf https://doaj.org/toc/1519-874X doi:10.5327/Z1519-874X201400010001 1519-874X https://doaj.org/article/5c1c050d48ef4af3af1574498b8c095b Geologia USP. Série Científica, Vol 14, Iss 1, Pp 3-20 (2014) Spinicaudata Mesozoic Rosário do Sul Group Paraná Basin Paleozoology Paleolimnology Geology QE1-996.5 article 2014 ftdoajarticles https://doi.org/10.5327/Z1519-874X201400010001 2022-12-31T10:15:37Z This paper focus on the first conchostracans (Crustacea, Spinicaudata) found at the São Luís outcrop (Caturrita Formation, Rosário do Sul Group), in Faxinal do Soturno, Rio Grande do Sul State, Brazil (29º33’ 29.09”S, 53º 26’ 54”W). Fossil vertebrates and plants identified at this outcrop suggest conflicting ages, respectively Late Triassic and Early Jurassic. Dinosaur tracks recently found at the upper part of the outcrop enhance these age problems. In this way, the conchostracans constitute important additional elements in this discussion. Some specimens share many characteristics with Carapacestheria disgregaris (Tasch) Shen (Eosestheriidae) of the Ferrar Group, Lower-Mid Jurassic of the Transantartic Mountains. But differences in the ornamentation details led to the proposal of a new genus and a new species, Nothocarapacestheria soturnensis , and to the interpretation of a close phylogenetic relationship with the Antarctic species. Other samples in this assemblage are similar to Australestheria corneti (Marliére) Chen (Fushunograptidae) of the Middle Jurassic from Zaire. Together, these conchostracans substantiate a Jurassic age and corroborate the data of the Bennettitales flora found at the same levels in the outcrop. However, the Late Triassic age indicated by the tetrapods cannot be discarded according to their lower stratigraphic position in São Luís outcrop. In the same way, the present chronostratigraphic discussion does not apply to the other occurrences of the Caturrita Formation, especially because the correlations between outcrops are extremely difficult, both by the lack of paleontological support and by the numerous faultings during the Mesozoic sedimentation in the southern part of the Paraná Basin. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Geologia USP. Série Científica 13 4 3 20 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Portuguese |
topic |
Spinicaudata Mesozoic Rosário do Sul Group Paraná Basin Paleozoology Paleolimnology Geology QE1-996.5 |
spellingShingle |
Spinicaudata Mesozoic Rosário do Sul Group Paraná Basin Paleozoology Paleolimnology Geology QE1-996.5 Rosemarie Rohn Tânia Lidner Dutra Marcus Vinicius Bonafé Cabral Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi |
topic_facet |
Spinicaudata Mesozoic Rosário do Sul Group Paraná Basin Paleozoology Paleolimnology Geology QE1-996.5 |
description |
This paper focus on the first conchostracans (Crustacea, Spinicaudata) found at the São Luís outcrop (Caturrita Formation, Rosário do Sul Group), in Faxinal do Soturno, Rio Grande do Sul State, Brazil (29º33’ 29.09”S, 53º 26’ 54”W). Fossil vertebrates and plants identified at this outcrop suggest conflicting ages, respectively Late Triassic and Early Jurassic. Dinosaur tracks recently found at the upper part of the outcrop enhance these age problems. In this way, the conchostracans constitute important additional elements in this discussion. Some specimens share many characteristics with Carapacestheria disgregaris (Tasch) Shen (Eosestheriidae) of the Ferrar Group, Lower-Mid Jurassic of the Transantartic Mountains. But differences in the ornamentation details led to the proposal of a new genus and a new species, Nothocarapacestheria soturnensis , and to the interpretation of a close phylogenetic relationship with the Antarctic species. Other samples in this assemblage are similar to Australestheria corneti (Marliére) Chen (Fushunograptidae) of the Middle Jurassic from Zaire. Together, these conchostracans substantiate a Jurassic age and corroborate the data of the Bennettitales flora found at the same levels in the outcrop. However, the Late Triassic age indicated by the tetrapods cannot be discarded according to their lower stratigraphic position in São Luís outcrop. In the same way, the present chronostratigraphic discussion does not apply to the other occurrences of the Caturrita Formation, especially because the correlations between outcrops are extremely difficult, both by the lack of paleontological support and by the numerous faultings during the Mesozoic sedimentation in the southern part of the Paraná Basin. |
format |
Article in Journal/Newspaper |
author |
Rosemarie Rohn Tânia Lidner Dutra Marcus Vinicius Bonafé Cabral |
author_facet |
Rosemarie Rohn Tânia Lidner Dutra Marcus Vinicius Bonafé Cabral |
author_sort |
Rosemarie Rohn |
title |
Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi |
title_short |
Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi |
title_full |
Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi |
title_fullStr |
Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi |
title_full_unstemmed |
Conchostracans as evidence of Jurassic levels in the Caturrita Formation, Faxinal do Soturno, Rio Grande do Sul, Brazi |
title_sort |
conchostracans as evidence of jurassic levels in the caturrita formation, faxinal do soturno, rio grande do sul, brazi |
publisher |
Universidade de São Paulo |
publishDate |
2014 |
url |
https://doi.org/10.5327/Z1519-874X201400010001 https://doaj.org/article/5c1c050d48ef4af3af1574498b8c095b |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Geologia USP. Série Científica, Vol 14, Iss 1, Pp 3-20 (2014) |
op_relation |
http://ppegeo.igc.usp.br/pdf/guspsc/v14n1/a01v14n1.pdf https://doaj.org/toc/1519-874X doi:10.5327/Z1519-874X201400010001 1519-874X https://doaj.org/article/5c1c050d48ef4af3af1574498b8c095b |
op_doi |
https://doi.org/10.5327/Z1519-874X201400010001 |
container_title |
Geologia USP. Série Científica |
container_volume |
13 |
container_issue |
4 |
container_start_page |
3 |
op_container_end_page |
20 |
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1766273400517427200 |