Palaeobiogeography of the Bauru Group, a dinosaur-bearing Cretaceous unit, northeastern Parana Basin, Brazil

Goldberg, Karin; Garcia, Antônio Jorge Vasconcellos

doi:10.1006/cres.2000.0207

Cited by 71 publications

(44 citation statements)

References 8 publications

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“…Progressive increase in aridity due to the persistence of a hot climate and to topographic heights surrounding the basin, allowed the establishment of alluvial plains, braided rivers and small temporary ponds (Mezzalira, 1980;Campanha et al, 1992;Silva et al, 1994;Etchebehere et al, 1999;Goldberg and Garcia, 2000). The new baurusuchid was found in this palaeoenvironmental setting.…”

Section: Introductionmentioning

confidence: 86%

“…The lowermost part of this unit was redefined by Batezelli et al (1999) as the Araçatuba Formation. The Uberaba Formation (ConiacianCampanian, Goldberg and Garcia, 2000) is composed of fine greenish sandstones interbedded by siltstones, coarse sandstones, mudstones and volcanoclastics. The Marília Formation was formally proposed by Soares et al (1980) as a sequence of coarse to conglomeratic sandstones, mudstones and carbonate levels.…”

Section: Introductionmentioning

confidence: 99%

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Baurusuchus salgadoensis, a New Crocodylomorpha from the Bauru Basin (Cretaceous), Brazil

2005

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Baurusuchus salgadoensis is a new baurusuchid crocodylomorph from Bauru Basin (Cretaceous), Brazil, partially preserved through a complete skull. The fossil comes from a fine sandstone sequence of Adamantina Formation, General Salgado County, São Paulo State. The sedimentary sequence where it was found, located in Fazenda Buriti, is considered Turonian-Santonian in age. The described species -Baurusuchus salgadoensis sp. nov. -is a baurusuchid with an antorbital fenestra, double external nares with a bony septum, two well-fused supraorbitals, the supratemporal fenestrae larger than the orbits and a quadrangular-shaped laterotemporal fenestra. The position of the external nares, located on anterior and terminal portion of the rostrum together with the theropod-like lateral compression of the snout and teeth are indicators that Baurusuchus salgadoensis was a terrestrial crocodyliform. This was a carnivorous species and the lateral compression of the rostrum could be interpreted as a mechanism to increase the skull resistance forces during biting. The pointed, conical teeth, some with crenulated borders, could be used to perforate and to carve the prey. The geological context of Baurusuchus salgadoensis indicates that it probably lived in a hot and arid climate.

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Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Baurusuchus salgadoensis, a New Crocodylomorpha from the Bauru Basin (Cretaceous), Brazil

2005

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“…The semi-arid climate of the Marilia Formation is attested by the large amount of calcretes that are common in environments with annual rainfall between 400 and 600 mm (Goudie, 1983), and by clay minerals from the group of illite and palygorskite/sepiolite (Suguio & Barcellos, 1983;Goldberg & Garcia, 2000), as well as paleoprecipitation proxies (Pereira et al, 2015).…”

Section: Geological Settingmentioning

confidence: 99%

“…Modern crayfish digs the substrate looking for shelter, protection of predators and carapace dryness (Wells, 2009). This mechanism is a primitive survival behavior to intercept the water table as an exit to face the climatic seasonality, ephemerality of the fluvial channels, and the fluctuations of the water table (Walls, 2009), in this case in semi-arid conditions prevailing during the formation of the deposits of the Marilia Formation (Goldberg & Garcia, 2000;Pereira et al, 2015).…”

Section: -Freshwater Decapoda Trace Fossils In Floodplain Paleosolsmentioning

confidence: 99%

Freshwater Decapoda trace fossils in floodplain paleosols of Marilia Formation in Minas Gerais State (SE Brazil)

Nascimento¹,

Batezelli²,

Ladeira³

2017

Rev. bras. paleontol.

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-The Marilia Formation (Bauru Group, Bauru Basin) is an important record of the Upper Cretaceous in Brazil, and hosts an important fossil content. However, works regarding continental ichnology in this unit are still scarce. In order to improve this knowledge, the present work describes the occurrence of Camborygma litonomos in paleosols developed from floodplain deposits of the Marilia Formation in the Minas Gerais State. This trace fossil is associated with the activity of freshwater crayfishes, digging the soil looking for protection and to avoid the carapace dryness. Crayfish body fossils have not yet been described in deposits of the Bauru Group, thus, the trace fossil here recorded is the exclusive evidence of this organism, which is of great importance to the knowledge of the invertebrates paleodiversity of the Marilia Formation during the Late Cretaceous.

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“…Durante o intervalo temporal no qual a Formação Adamantina se depositou, o aumento progressivo na aridez, devido à persistência de um clima quente e altos topográficos circundantes à bacia, conduziu ao desenvolvimento de amplas planícies aluviais, rios entrelaçados e pequenos lagos temporários (Mezzalira, 1980;Campanha et al, 1992;Goldberg & Garcia, 2000), contexto no qual está inserido o ninho de coleóptero aqui analisado. A ação bioturbadora de insetos em ambientes atuais é também frequente em planícies aluviais e barras arenosas de rios temporários.…”

unclassified

Uma câmara de coleóptero (Coprinisphaera) do Cretáceo Superior, Bacia Bauru

Carvalho¹,

Gracioso²,

Fernandes³

2009

RBG

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Resumo Na Formação Adamantina (Bacia Bauru, Turoniano-Santoniano) foi identificado o icnogênero Coprinisphaera, sendo o exemplar atribuído à icnoespécie Coprinisphaera cf. C. ecuadoriensis Sauer, 1955. Nos ambientes continentais, as bioturbações podem ser produzidas por diferentes grupos de invertebrados, tais como os nemátodes, anelídeos, biválvios, gastrópodes e artrópodes. As rochas da Formação Adamantina compreendem uma sucessão de arenitos finos, argilitos, siltitos e arenitos argilosos, os quais são interpretados como depositados em barras de canal expostas e planícies de inundação associadas com áreas de ambientes fluviais entrelaçados. Nestes depósitos encontra-se o exemplar atribuído à atividade de coleópteros escarabeí-deos, a qual é interpretada como construção para a nidificação desses animais visando a postura e alimentação das larvas, geralmente preservado em paleossolos. A presença de Coprinisphaera na Formação Adamantina contribui com novas informações sobre a distribuição estratigráfica deste icnogênero.Palavras-chave: Coprinisphaera, Bacia Bauru, Cretáceo Superior.Abstract A Coleoptera breeding ball (Coprinisphaera) from the Upper Cretaceous, Bauru Basin, Brazil. In the Adamantina Formation (Bauru Basin, Turonian-Santonian) it was identified Coprinisphaera, attributed to the ichnospecies Coprinisphaera cf. C. ecuadoriensis Sauer, 1955. In the continental environments, the bioturbation can be produced by several groups of invertebrate organisms, including nematodes, annelids, bivalves, gastropods and arthropods. The Adamantina Formation is a sequence of fine sandstones, mudstones, siltstones and muddy sandstones, whose sediments are interpreted as deposited in exposed channel-bars and floodplains areas of braided fluvial environments. In these deposits was found the specimen considered as a breeding ball constructed and provisioned by adult beetles (Scarabeid), to conceal and feed larvae, that are generally preserved in paleosols. The occurrence of Coprinisphaera in the Adamantina Formation allow new data concerning the stratigraphic distribution of this ichnogenus.

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Palaeobiogeography of the Bauru Group, a dinosaur-bearing Cretaceous unit, northeastern Parana Basin, Brazil

Cited by 71 publications

References 8 publications

Baurusuchus salgadoensis, a New Crocodylomorpha from the Bauru Basin (Cretaceous), Brazil

Baurusuchus salgadoensis, a New Crocodylomorpha from the Bauru Basin (Cretaceous), Brazil

Freshwater Decapoda trace fossils in floodplain paleosols of Marilia Formation in Minas Gerais State (SE Brazil)

Uma câmara de coleóptero (Coprinisphaera) do Cretáceo Superior, Bacia Bauru

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