scholarly journals First record of Crenicichla semifasciata (Heckel, 1840) (Teleostei: Cichlidae) in the upper rio Paraná basin, Brazil

Check List ◽  
2015 ◽  
Vol 11 (2) ◽  
pp. 1610 ◽  
Author(s):  
Camilo Andrés Roa-Fuentes ◽  
Jaquelini Zeni ◽  
Henrique Varella ◽  
Francisco Langeani ◽  
Mariana Molina
Keyword(s):  
First Record ◽  
Lower Portion ◽  
Order Stream ◽  
Mato Grosso ◽  
First Order ◽  
Hydroelectric Dam ◽  
Paraná Basin ◽  
Parana Basin

Crenicichla semifasciata was described from the rio Paraguai in “Caiçara” (in front of Cáceres, Mato Grosso, Brazil) and has been reported in the rio Paraguai and lower portion of the rio Paraná downstream of the Itaipu hydroelectric dam, but considered absent in the upper rio Paraná and in the rio Uruguai basin. In this paper, we document the first record of C. semifasciata in a first order stream of the Ribeirão Buritis, tributary of the rio São José dos Dourados, upper rio Paraná basin.

scholarly journals Biostratigraphy and paleoecology of an unusual palynological record from the Aquidauana Formation, Late Pennsylvanian of Paraná Basin

2015 ◽  
Vol 87 (2) ◽  
pp. 611-622 ◽  
Author(s):  
Paulo A. Souza ◽  
José A.J. Perinotto ◽  
Cristina M. Félix ◽  
Bruno C. Araújo
Keyword(s):  
Pollen Grains ◽  
Middle Portion ◽  
Mato Grosso ◽  
Paleontological Data ◽  
Reproduction Strategy ◽  
Paraná Basin ◽  
Parana Basin ◽  
Mato Grosso Do Sul ◽  
Glacial Climate ◽  
Sedimentary Unit

The Aquidauana Formation is a Permo-Carboniferous sedimentary unit, widely stratigraphicaly distributed in the northwestern and northern portions of the Paraná Basin. However, little paleontological data is available from this formation, preventing accurate biostratigraphic and paleoecological interpretations. An abundant, diversified and well preserved assemblage of palynomorphs was recognized from sampling conducted in an outcrop section in Cipolândia District of Aquidauana Municipality, state of Mato Grosso do Sul, Brazil. A total of 35 indigenous palynomorph taxa was recognized, comprising 6 species of spores (related to 5 genera), 28 species of pollen grains (14 genera) and 1 species of chlorophycean algae. Monosaccate pollen grains are exceptionally dominant, representing 90.38% of the association, particularly constituted by species of the genera Cannanoropollis (30.41% of the total assemblage), Potonieisporites (28.14%) and Plicatipollenites (19.52%). This quantitative overrepresentation is not usual from Gondwana deposits, revealing a particular plant dominance of Cordaitales in the terrestrial flora. These results are interpreted as an upland ecology characterized by plants with a moisture-independent reproduction strategy, under a glacial climate influence. Certain species of pollen allow assignment of this assemblage to the Crucisaccites monoletus Zone (Late Pennsylvanian), which had been recognized only in the middle portion of the Itararé Group at the northeastern margin of the basin.

scholarly journals Corumbataia britskii (Siluriformes: Loricariidae: Hypoptopomatinae) a new species from the upper Rio Paraná basin, Mato Grosso do Sul, Central Brazil

Zootaxa ◽  
2007 ◽  
Vol 1386 (1) ◽  
pp. 59-68 ◽  
Author(s):  
KATIANE M. FERREIRA ◽  
ALEXANDRE C. RIBEIRO
Keyword(s):  
New Species ◽  
Mato Grosso ◽  
Central Brazil ◽  
Paraná Basin ◽  
Parana Basin ◽  
Mato Grosso Do Sul ◽  
A New Species

A new Hypoptopomatinae, Corumbataia britskii, is described based on specimens recently collected in a tributary of the upper Rio Paraná basin, Mato Grosso do Sul State, Brazil. Corumbataia britskii differs from its congeners by having a more depressed head profile (vs. a more rounded head profile in C. cuestae and C. tocantinensis), by having a more developed and conspicuous tuft of enlarged odontodes on the tip of the supraoccipital (vs. its reduced condition found in C. cuestae and C. tocantinensis), and by heaving a partially enclosed arrector fossae (vs. an almost completely enclosed arrector fossae in C. cuestae and C. tocantinensis).

scholarly journals Unrecognized biodiversity in a world’s hotspot: three new species of Melanorivulus (Cyprinodontiformes: Rivulidae) from tributaries of the right bank of the Rio Paraná basin, Brazilian Cerrado

2018 ◽  
Vol 94 (2) ◽  
pp. 263-280 ◽  
Author(s):  
Matheus V. Volcan ◽  
Francisco Severo-Neto ◽  
Luis Esteban K. Lanés
Keyword(s):  
New Species ◽  
Species Group ◽  
The Body ◽  
Conservation Strategies ◽  
Distal Margin ◽  
Brazilian Cerrado ◽  
Mato Grosso ◽  
Paraná Basin ◽  
The Right ◽  
Parana Basin

The genus Melanorivulus presents a wide geographical distribution in the Neotropical region. Among Melanorivulus, the M.pictus species group has currently 18 species distributed in the Brazilian Cerrado, mainly in the upper Rio Paraná basin, with some species occurrences in the upper Rio Araguaia and Tocantins. In the present study, we describe three new Melanorivulus species, belonging to the M.pictus species group from different drainages of the right bank of the Rio Paraná basin in Mato Grosso do Sul state, Brazil. These new species are easily distinguished from the others by their unique colour patterns. Melanorivulusinterruptus is distinguished from all species of the M.pictus group by the presence of oblique chevron-like red bars interrupted, mainly on the midline of the flank in males; while M.ivinhemensis by the yellow colouration of the caudal fin with thin red bars arranged only in the median region of the fin in males. Melanorivulusamambaiensis is distinguished from all species of the M.pictus species group by having an orange anal fin or sometimes more reddish-orange with distal margin grey or dark grey and chevron-like bars along the body, distinctly branched ventrally forming an inverted Y-shape in males. The high diversity of the Melanorivulus species with high levels of endemism demands the development of conservation strategies to avoid the loss of their vulnerable habitats in the Cerrado biome. We expect presence of more species of the M.pictus species group also along the lower reaches of the tributaries of the Rio Paraná. Additionally a dichotomic identification key of the M.pictus species group is provided.

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 MUDANÇAS RECENTES DE LEITO NO BAIXO CURSO DO RIO TAQUARI, NO PANTANAL MATO-GROSSENSE

2001 ◽  
Vol 49 ◽  
Author(s):  
Carlos R. Padovani
Keyword(s):  
Sedimentary Basin ◽  
Landsat Tm ◽  
Quaternary Sediments ◽  
Drainage Pattern ◽  
Mato Grosso ◽  
Meandering Channel ◽  
Course Changes ◽  
Paraná Basin ◽  
The Subject ◽  
Parana Basin

Uma das características marcantes do rio Taquari, no curso inferior, é a sua capacidade de deposição de sedimentos, com a formação de um grande leque aluvial que provoca a instabilidade do leito principal, comprometendo a navegação e as atividades econômicas desenvolvidas no local. As mudanças observa-das no baixo curso do rio Taquari, entre 1966 e 1997, através da interpretação de imagens de satélite Landsat TM-5 e levantamentos de coordenadas com GPS levaram à constatação da existência de um novo canal principal, que se formou em decorrência do desvio de curso pelo rompimento da margem direita, no local conhecido como "Arrombado Zé da Costa". Este novo canal é responsável por 70 % da vazão atual em detrimento da grande redução da descarga no leito antigo. As informações coletadas, além de permitirem a atualização das cartas de drenagem, tornando possível a análise e comparação com mapas anteriores a 1966 podem ser utilizadas, também, na definição de situações de risco para as atividades humanas e na determinação de formas adequadas de manejo e utilização da área. RECENT CHANGES IN THE LOWER COURSE OF TAQUARI RIVER IN THE PANTANAL, BRAZIL Abstract The Taquari river flows from the Parana Basin Plateaus of Mato Grosso State to the lowland region of Pantanal. The Pantanal Cenozoic Sedimentary Basin is made up of unconsolidated Quaternary sediments deposited over the pre-cambrian basement and showing geological boundary on the east side with rocks of Paleozoic and Mesozoic age from the Parana Basin (figure 1). One can notice that the Taquari river in its upper course has a meandering channel. The sinuosity is decreased very sharply in the middle and lower courses due to intense sediment deposition The consequence of this alluvial sedimentation process can be easily seen in the middle of the river course by several lobes causing an unstable drainage pattern with many points of avulsion. like one named "Arrombado Zé da Costa" (figure 2) which is responsible for 70% of the actual discharge and shifting the main channel course. The subject of this work was to map the lower course changes of the Taquari river that took place from 1966 to 1997 by the Landsat TM-05 satellite images interpretation and GPS data (figure 2). The natural changes in the lower Taquari river, were expressive for 31 years and these changes have been accelerated by the effects of human activities in the area.

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 O DEVONIANO NO ESTADO DO MATO GROSSO DO SUL, BRASIL: NOVA ÁREA DE DISTRIBUIÇÃO E PRESENÇA DE TÍPICA FAUNA MALVINOCÁFRICA

2020 ◽  
Vol 30 (2) ◽  
pp. 38-76
Author(s):  
Sandro Scheffler ◽  
Rafael da Silva ◽  
Daniel Sedorko
Keyword(s):  
The State ◽  
Mato Grosso ◽  
Distribution Maps ◽  
Paraná Basin ◽  
Parana Basin ◽  
Eastern Edge ◽  
Mato Grosso Do Sul ◽  
Late Emsian

Devonian strata are widely known for the eastern edge of the Paraná Basin, particularly in the state of Paraná. However, studies are still scarce on the northwestern border, especially in the state of Mato Grosso do Sul. During the studies, around 120 geological and paleontological sites in the region were identified, and some discrepancies were identified in the distribution maps of the Devonian units (Campos Gerais / Chapada Group) in that state. This paper presents a review on the Devonian strata distribution in Mato Grosso do Sul state, as well a survey of paleontological works in the region of occurrence of the climax Malvinokaffric fauna (Pragian-early Emsian) in order to increase the discussion about the genesis of Devonian deposits. This fauna, combined with other stratigraphic evidences, corroborates a non-compartmentalization of the Paraná Basin for this age. The hypothesis of a tectonism concomitant with the deposition of the Ponta Grossa Formation (=lower Chapada II Group) is raised, mainly to the top of the unit, corroborated by a progradational context followed by a depositional hiatus during the middle Emsian at the end of the Eifelian in the area. It is possible that the Campo Grande Arch only acquired geomorphological expressiveness during the middle Emsian which would be attested by the absence of strata dated as late Emsian / Eifelian in croping areas in the state.

Sign in / Sign up

Export Citation Format

Share Document