The first record of Hirnantian Ostracoda in South America: implications for the biostratigraphy and paleozoogeography of the Paraná basin

2021 ◽  
pp. 1-11
Author(s):  
Lívio Reily de Oliveira Gonçalves ◽  
Dermeval Aparecido Do Carmo ◽  
Maria José Salas ◽  
Rodrigo Rodrigues Adôrno ◽  
Tõnu Meidla ◽  
...  
Keyword(s):  
South America ◽  
Type Species ◽  
Continuous Process ◽  
First Record ◽  
Index Species ◽  
First Occurrence ◽  
Paraná Basin ◽  
Parana Basin

Abstract Herein is reported the first occurrence of ostracodes from the Iapó Formation, an uppermost Ordovician unit of the Rio Ivaí Group in the Paraná basin, Brazil. Two ostracode species were identified in the Três Barras Farm section: Harpabollia harparum (Troedsson, 1918) and Satiellina paranaensis Adôrno and Salas in Adôrno et al., 2016 were recovered from dropstone-bearing shale overlying glaciogenic diamictites, a feature typical of Hirnantian (uppermost Ordovician) strata throughout Gondwana. The taxonomy of the Genus Harpabollia, as well as its type species Harpabollia harparum, was reviewed, and emended and new diagnoses were respectively proposed for each taxon. Occurrences of Harpabollia harparum and Satiellina species were common in areas influenced by cold waters. Additionally, the occurrence of Harpabollia harparum, an index species to the uppermost Ordovician of several stratigraphic units in Baltica and southern Gondwana, allowed us to infer a Hirnantian age for the deposits of the Iapó Formation. Other than being associated with Harpabollia harparum in Iapó Formation of the Paraná basin, Satiellina paranaensis is also found in lower levels of the Vila Maria Formation; therefore, these are also considered Hirnantian in age. Above these lower levels of the Vila Maria Formation, a well-dated Rhuddanian (lowermost Llandovery, Silurian) palynomorph assemblage is observed within the formation. These occurrences are evidence of a continuous process of sedimentary deposition during the Ordovician–Silurian transition in the Paraná basin.

scholarly journals Review of Oliveirania santa catharinae (sic) Maury 1927 and associated ichnofossils (Itararé Group, Late Carboniferous of Paraná Basin, Brazil)

Terr Plural ◽  
2021 ◽  
Vol 15 ◽  
pp. e2117741
Author(s):  
Rafael Costa da Silva ◽  
◽  
Antonio Carlos Sequeira Fernandes ◽  
Keyword(s):  
20Th Century ◽  
Late Carboniferous ◽  
Santa Catarina ◽  
The World ◽  
First Occurrence ◽  
Paraná Basin ◽  
The Subject ◽  
Parana Basin

The sedimentary layers of Anitápolis, Santa Catarina, were the subject of relevant discussions about age and paleoenvironment in the first half of the 20th century. Today they are correlated to the ritmites from Itararé Group, but some of the fossils that are part of these studies were not subsequently revised. This is the case of Oliveirania santa catharinae (sic) Maury 1927, a species originally attributed to annelids, and the ichnofossils attributed to it by association. The Annelida fossils were considered here as pseudofossils of inorganic origin. The ichnofossils attributed to Oliveirania were redescribed as a new ichnospecies, Pterichnus mauryae isp. nov., possibly related to the activity of crustaceans. This is the first occurrence of Pterichnus in Brazil and the oldest in the world.

Audiomagnetotelluric study in northeast region of Paraná Basin, South America

Geophysics ◽  
1989 ◽  
Vol 54 (7) ◽  
pp. 824-831 ◽  
Author(s):  
A. L. Padilha ◽  
N. B. Trivedi ◽  
J. M. da Costa ◽  
I. Vitorello ◽  
A. Dupis ◽  
...  
Keyword(s):  
South America ◽  
Gravity Anomaly ◽  
Volcanic Rocks ◽  
Rio Grande ◽  
Groundwater Exploration ◽  
Group A ◽  
Good Potential ◽  
Paraná Basin ◽  
Parana Basin ◽  
Bauru Group

We conducted natural‐source audiomagnetotelluric (AMT) soundings at 31 stations along a 215 km profile in the Paraná Basin (South America) across the previously postulated Araxá‐Rio Grande alignment. Our objective was to study the resistive structures of the upper layers of the sedimentary sequence; our results made it possible to map the surficial layer of sediments of the Bauru group, a layer that reaches thicknesses of up to 250 m. We concluded that AMT soundings have reasonably good potential for groundwater exploration in the region. The varying thicknesses of Bauru group sediments and the irregularities of their contact surface with resistive volcanic rocks of the Serra Geral formation along the profile were not known previously. Our AMT profile crossed an important positive gravity anomaly located near the Rio Grande (a natural boundary between the states of São Paulo and Minas Gerais, in Brazil) which has not been fully interpreted. Five sites for deeper MT soundings, which may throw light on possible causes of the gravity anomaly, were selected based on the conclusions from the AMT survey.

New material of Procolophon (Parareptilia: Procolophonoidea) from the Lower Triassic of Brazil, with remarks on the ages of the Sanga do Cabral and Buena Vista formations of South America

2006 ◽  
Vol 43 (11) ◽  
pp. 1685-1693 ◽  
Author(s):  
Sérgio Dias-da-Silva ◽  
Sean Patrick Modesto ◽  
Cesar Leandro Schultz
Keyword(s):  
South America ◽  
Lower Triassic ◽  
Dental Morphology ◽  
Early Triassic ◽  
Compelling Evidence ◽  
Buena Vista ◽  
New Material ◽  
Paraná Basin ◽  
Available Information ◽  
Parana Basin

We describe a large, fragmentary procolophonid skull and three large vertebrae from the Sanga do Cabral Formation, Paraná Basin, Lower Triassic of Brazil. Cranial and dental morphology allow us to refer the skull to the genus Procolophon; the fragmentary nature of the specimen, however, does not permit identification to species. The vertebrae are tentatively assigned to Procolophon. They are of a size expected for an individual represented by the skull, although the cranial and postcranial elements were not directly associated. The vertebrae are unusual for a procolophonid in exhibiting neural arches that are twice as broad as they are long, a dimension seen elsewhere among parareptiles only in pareiasaurs. A comparison of the manner of tetrapod preservation between the Sanga do Cabral and Katberg formations reveals that tetrapods in the former occur within conglomerates, whereas in the latter they are recovered mainly from mudstones. This taphonomic disparity may account for the absence in South America of the nearly cosmopolitan synapsid Lystrosaurus. The recent recognition of Permian tetrapods from the Buena Vista Formation of Uruguay, regarded widely to be a lateral equivalent of the Sanga do Cabral Formation, is assessed. We conclude that there is no compelling evidence of Permian tetrapods from the Buena Vista Formation and that the available information is suggestive of an Early Triassic age for that formation.

scholarly journals Ascocerid cephalopods from the Hirnantian?–Llandovery stages of the southern Paraná Basin (Paraguay, South America): first record from high paleolatitudes

2018 ◽  
Vol 93 (1) ◽  
pp. 37-47
Author(s):  
M. Cichowolski ◽  
N.J. Uriz ◽  
M.B. Alfaro ◽  
J.C. Galeano Inchausti
Keyword(s):  
Rare Condition ◽  
First Record ◽  
High Latitudes ◽  
Stage Of Development ◽  
Intracratonic Basins ◽  
Mode Of Life ◽  
Paraná Basin ◽  
Parana Basin ◽  
First Time ◽  
Juvenile Shell

AbstractAscocerid cephalopods are described for the first time from high paleolatitudes of Gondwana. Studied material was collected from the Hirnantian?–Llandovery strata of the Eusebio Ayala and Vargas Peña formations, Paraná Basin, southeastern Paraguay. The specimens are poorly preserved and were questionably assigned to the subfamily Probillingsitinae Flower, 1941, being undetermined at genus and species rank because diagnostic characters are not visible. A particular feature seen in our material is the presence of both parts of the ascocerid conch (the juvenile or cyrtocone and the mature or brevicone) joined together, which is a very rare condition in the known paleontological record. The specimens are interpreted as at a subadult stage of development because fully grown ascocerids would have lost the juvenile shell. A planktonic vertical migrant mode of life with a subvertical attitude is proposed for the juvenile, and a horizontal demersal nektonic mode for the adult form, as has been previously suggested. A subvertical orientation near the bottom is proposed for the subadult stage. We suggest that the immigration of ascocerids to southwestern Gondwana was possible through ocean currents that would carry the planktonic juveniles from low to high latitudes during the end-Ordovician postglacial transgression that flooded the intracratonic basins of the region.

scholarly journals First record of a theropod (Dinosauria, Theropoda) from the Late Cretaceous of the Bauru Group, southern Goiás State, Brazil

2020 ◽  
Vol 9 (8) ◽  
Author(s):  
Carlos Roberto Candeiro ◽  
Sthepen Brusatte ◽  
Raoni Ribeiro Guedes Costa ◽  
Michael Ulian ◽  
Bruno Ferreira Martins ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Cross Section ◽  
Late Cretaceous ◽  
First Record ◽  
The State ◽  
The South ◽  
Paraná Basin ◽  
Midwest Region ◽  
Parana Basin ◽  
Bauru Group

The objective of this article is to describe the first record of a theropod carnivorous dinosaur from the Late Cretaceous of the Adamantina Formation (Bauru Group, Paraná Basin) in the south of the state of Goiás in the Midwest region of Brazil. The methodology of this work was based on a bibliographic survey about the characteristics of teeth of theropods and the geology of the region, in addition to the description and morphological comparisons. This specimen was found in a geodiversity site called Serra da Portaria, in the Paraúna State Park, municipality of Paraúna, where residuals from the Adamantina Formation is exposed. The specimen, a fragmentary tooth covered with iron oxide, but with a partially preserved crown, was assigned as a percentage to an undetermined theropod for having a labiolingually compressed crown and cross section. In addition to the Bauru Group in the state of Goiás, only remnants of sauropod herbivorous dinosaurs are known for the Adamantina and Marília formations, the tooth described here is the first osteological record of a theropod from the south of Goiás.

scholarly journals The first record of Diclidurus ingens Hernandez-Camacho, 1955 (Emballonuridae) in Central Brazil

2009 ◽  
Vol 9 (4) ◽  
pp. 249-252 ◽  
Author(s):  
Julio Cesar Dalponte ◽  
Ludmilla Moura de Souza Aguiar
Keyword(s):  
South America ◽  
First Record ◽  
Range Extension ◽  
Central Brazil ◽  
The Family ◽  
First Occurrence ◽  
Vast Area

Species of sheath-tailed bats in the family Emballonuridae are pantropical in distribution. Ghost bats in the genus Diclidurus (Wied-Neuwied, 1820) comprehend four species that occur in the Neotropical regions of Central and South America. However, distributional records are sparsely documented across this vast area. The objective of this study is to report the first occurrence of D. ingens in Central Brazil, representing a range extension of 850 kilometers.

scholarly journals A stratigraphic chart of the Late Carboniferous/Permian succession of the eastern border of the Paraná Basin, Brazil, South America

2010 ◽  
Vol 29 (2) ◽  
pp. 381-399 ◽  
Author(s):  
Michael Holz ◽  
Almério B. França ◽  
Paulo A. Souza ◽  
Roberto Iannuzzi ◽  
Rosemarie Rohn
Keyword(s):  
South America ◽  
Late Carboniferous ◽  
Paraná Basin ◽  
Eastern Border ◽  
Parana Basin ◽  
Stratigraphic Chart

A new species of Petunia (Solanaceae) from Corrientes, Argentina

Phytotaxa ◽  
2019 ◽  
Vol 414 (6) ◽  
pp. 289-295
Author(s):  
JULIÁN ALEJANDRO GREPPI ◽  
JUAN CARLOS HAGIWARA ◽  
JOÃO RENATO STEHMANN
Keyword(s):  
New Species ◽  
South America ◽  
Sandy Soils ◽  
Southern South America ◽  
Fruiting Stage ◽  
Paraná Basin ◽  
Parana Basin ◽  
A New Species

We describe and illustrate a new species of Petunia, P. correntina, from southwestern Corrientes, Argentina, in southern South America. The species has funnel-form corolla with whitish-green tube and purple lobes, apex of longer filaments nearly straight, apex of medium filaments curved laterally and opposite each other, connivent anthers, bluish pollen, stigma located between anthers of the large and medium stamens and inflexed pedicels in fruiting stage. This suit of characters is unique into the genus. Few populations are known, inhabiting sandy soils of the Paraná basin. A key to the Argentinian species of Petunia with purple corolla is given.

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