Leaiid conchostracans from the uppermost Permian strata of the Paraná Basin, Brazil: Chronostratigraphic and paleobiogeographic implications

Ferreira-Oliveira, Luis Gustavo; Rohn, Rosemarie

doi:10.1016/j.jsames.2009.03.006

Cited by 23 publications

(7 citation statements)

References 22 publications

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“…Some identified genera are coherent with a Mid to Late Permian age of the Rio do Rasto Formation. Hemicycloleaia mitchelli, only found at three localities in the upper part of the formation, is particularly important for correlations and suggests a Wuchiapingian age (early Late Permian or early Lopingian; Ferreira-Oliveira and Rohn, 2009).…”

Section: Fossils and Biostratigraphymentioning

confidence: 92%

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

Holz

França²,

Souza

et al. 2010

Journal of South American Earth Sciences

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334

230

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Section: Fossils and Biostratigraphymentioning

confidence: 92%

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

Holz

França²,

Souza

et al. 2010

Journal of South American Earth Sciences

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334

230

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“…Thus, the freshening of the Paran a epeiric system increased significantly at this time (see also Ferreira-Oliveira and . Among the recorded conchostracan species, Monoleaia unicostata is one of the most abundant, showing a wide stratigraphic range (Rohn, 1988(Rohn, , 1994Ferreira-Oliveira and Rohn, 2010) and occurring in direct association with the studied bivalves. The tendency of the water towards increased freshening at the end of the Permian Period in the Paran a Basin is also attested by the oxygen and carbon stable isotope values of eodiagenetic concretions of the Serrinha Member (Alessandretti et al, 2015), nearly 10 m above the contact with the underlying Teresina Formation.…”

Section: Faunal Turnover and Paleoenvironmental Changementioning

confidence: 98%

A new Permian bivalve-dominated assemblage in the Rio do Rasto Formation, Paraná Basin, Brazil: Faunal turnover driven by regional-scale environmental changes in a vast epeiric sea

Simões

Matos

Anelli

et al. 2015

Journal of South American Earth Sciences

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a b s t r a c tThe basal portion of the Permian Rio do Rasto Formation (Serrinha Member), Passa Dois Group, Paran a Basin, Brazil, records an entirely new bivalve fauna intercalated between the underlying Pinzonella neotropica assemblage (uppermost portion of the Teresina Formation) and the overlying Leinzia similis assemblage (Rio do Rasto Formation). Mollusks of these assemblages lived in marginal shallow-water habitats of an immense epeiric sea and were dominated by endemic bivalve species. Taxonomic analysis revealed the presence of Terraia curvata (60.61%), Astartellopsis prosoclina (19.70%), Cowperesia emerita (10.61%), Leinzia curta (4.55%), Terraia bipleura (3.03%) and Beurlenella elongatella (1.52%), which are associated with conchostracans and plant remains. Species composition, abundance, and dominance in this novel assemblage differ notably from the preceding ones, suggesting a substantial evolutionary turnover. Regional-scale environmental changes recognized based on taphonomy, facies analysis, and geochemical data consist of progressive freshening of the marginal habitats of the Paran a Basin and taxic changes that include the following: (a) loss of genera, (b) decrease in bivalve abundance and ecological guilds, (c) disappearance of the dominant bivalve group (Pinzonellinae) and (d) diversification of Terrainae bivalves. The ecological signature also changed notably because only infaunal suspension-feeding bivalves are present, indicating a significant loss of functional diversity at the regional scale. Likely stressor factors (among others) are tied to freshening events, suggesting profound changes in (a) salinity, (b) primary productivity and (c) a lack of coarse, stable substrates coupled with high bioturbation rates. Hence, our regional example could offer valuable clues to benthic (bivalve) community responses in a habitat subjected to (a) rapid climate changes and (b) freshening events in shallow-water settings. Finally, the stratigraphic range of the dominant species (T. curvata) appears to be restricted to the basal portion of the Rio do Rasto Formation. Based on the presence of this species and of C. emerita, the novel assemblage is tentatively correlated with that of the Permian Gai-As Formation in the Huab region of Namibia, thus supporting previous assumptions of a seaway connecting both basins during the Guadalupian Epoch.

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“…The lower contact of the Rio do Rasto Formation with the Teresina Formation is gradational, whereas its upper contact with the Piramboia Formation is usually discordant across the Paraná Basin (Almeida, ). Rarely, it is gradational in Serra do Cadeado and other regions of the Paraná Basin (Riccomini et al ., ; Ragonha, ; Lavina, ; Lavina, Faccini & Ribeiro, ; Rohn, ; Lavina & Scherer, ; Ferreira‐Oliveira & Rohn, ).…”

Section: Geological Settingmentioning

confidence: 99%

The cranial morphology of the temnospondylAustralerpeton cosgriffi(Tetrapoda: Stereospondyli) from the Middle-Late Permian of Paraná Basin and the phylogenetic relationships of Rhinesuchidae

et al. 2015

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Stereospondyls are a diverse and morphologically distinctive clade of basal tetrapods that rapidly reached a global distribution and high abundance during the Early Triassic. Yet, the first stereospondyls appeared in the MiddleLate Permian of Gondwana, mostly represented by Rhinesuchidae. Australerpeton cosgriffi is a long-snouted representative of the group and one of the most complete temnospondyls known from the Permian of South America. The elements attributed to Au. cosgriffi were recovered from the Middle-Late Permian deposits of the Rio do Rasto Formation (Paraná Basin), in the Serra do Cadeado area of Brazil. Here, we review the cranial anatomy of the species, providing a comparative redescription, new anatomical data and previously unrecognized characters. Australerpeton cosgriffi is nested within Rhinesuchidae based on the anatomy of the tympanic cavity, but its longsnouted condition is unique amongst rhinesuchids. Based on the recovered information and new morphological data, the systematic position of Au. cosgriffi was assessed using a new matrix of 221 characters; of which 196 were selected from previous studies and the remaining are newly proposed. The results show Rhinesuchidae divided into Rhinesuchinae and Australerpetinae. A unique tympanic cavity formed by a well posteroventrally projected tabular horn, stapedial groove, well-developed oblique crest on the pterygoid, and a dorsal pterygoid crest (new term) characterizes the ear region of Rhinesuchidae. Australerpeton cosgriffi is the only undisputed Rhinesuchidae record outside southern Africa and the first long-snouted Stereospondyli, and thus is useful in helping to understand the diversification of the stereospondyls during the Middle/Late Permian of Gondwana.

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Leaiid conchostracans from the uppermost Permian strata of the Paraná Basin, Brazil: Chronostratigraphic and paleobiogeographic implications

Cited by 23 publications

References 22 publications

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

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

A new Permian bivalve-dominated assemblage in the Rio do Rasto Formation, Paraná Basin, Brazil: Faunal turnover driven by regional-scale environmental changes in a vast epeiric sea

The cranial morphology of the temnospondylAustralerpeton cosgriffi(Tetrapoda: Stereospondyli) from the Middle-Late Permian of Paraná Basin and the phylogenetic relationships of Rhinesuchidae

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