Morphological consequence of Gangamopteris McCoy in Glossopteris flora

Srivastava, Ashok; Agnihotri, Deepa

doi:10.1016/j.jseaes.2010.04.033

Cited by 11 publications

(10 citation statements)

References 11 publications

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“…It justifies the favorable environmental conditions, i.e., warm and humid, suggested by previous workers (Lele, 1976;Chandra & Chandra, 1988) for the development of such rich Glossopteris flora. The presence of Genus Gangamopteris and Noeggerathiopsis advocates for the Lower Barakar Formation (Tewari, 2007;Tewari et al, 2015 and, while the smaller size leaves (Glossopteris oldhamii, G. tenuifolia and G. taenioides) represent the flora of the Upper Barakar Formation (Srivastava and Agnihotri, 2010;Tewari et al, 2017). In general, the Gloosopteris flora is comparable with the flora known from other Gondwana basins in India (namely Damodar, Mahanadi, South Rewa, Satpura, Wardha and Godavari basins) (Table 2).…”

Section: Discussionmentioning

confidence: 99%

“…This floral species equivocally supports the continental drift theory, which advocates that the Indian subcontinent was an integral part of Gondwanaland along with other continents. Furthermore, different fossil evidence recorded from the Indian Gondwana basin infers the paleoenvironmental conditions for the growth of this species (Tewari 2007;Srivastava & Agnihotri, 2010;Tewari et al, 2017;Joshi, 2014Joshi, , 2018aJoshi, & 2020Joshi et al, 2015). After a thorough study of the fossil evidence from Indian Gondwana it is evident that the environment was moist temperate during the Permo-Carboniferous period where forest type vegetation was dominated by gymnospermous plants probably belonging to Glossopteris (Pant & Singh 1968;Joshi, 2018aJoshi, , b & 2020Prasad & Pundir, 2020).…”

Section: Paleoenvironmentmentioning

confidence: 99%

“…Different species of Gangamopteris are well-reported and documented in almost all parts of Gondwanaland, i.e., Australia, Antarctica, Argentina, Brazil, India, Madagascar, and South Africa (McCoy, 1847;Feistmantel, 1890;Dolianiti, 1954;Pant & Singh, 1968;Srivastava, 1992;Singh, 2000). The leaves of Gangamopteris McCoy are the dominant constituent of Glossopteris flora in the Early Permian sequences of Gondwana (Srivastava and Agnihotri, 2010). Morphologically leaves are similar to Glossopteris Brongniart in having reticulate venation pattern but differ in the absence of a midrib (Chandra & Surange, 1979).…”

Section: Introductionmentioning

confidence: 99%

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First Report of Gangamopteris rajaensis from Rajmahal Gondwana Basin, Jharkhand, India

Joshi¹,

Priya²

2021

Türkiye Jeoloji Bülteni / Geological Bulletin of Turkey

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The present study deals with the systematic description of macro and miofloral analysis of Gangamopteris rajaensis and Glossopteris indica from the carbonaceous shale-coal bearing sequences of the Rajmahal Open Cast Mine, Rajmahal Basin, Jharkhand, India. The floral diversity, age correlation, and the paleoenvironment of the Barakar Formation were well described. Morphological analysis revealed the reticulate venation pattern, anastomosing of veins, and the absence of the midrib in Gangamopteris rajaensis. The recovered megafloral assemblages of Gangamopteris rajaensis and Glossopteris indica suggest a late early Permian (Artiskian-Kungurian) age for the Barakar strata of Rajmahal coal mine and the prevalence of a moderately warm climate during their deposition. Earlier the species was reported from the Barakar Formation of Damodar and Mahanadi Gondwana basins in India. However, this is the first detailed systematic investigation of this species from the Rajmahal Gondwana Basin,

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Section: Discussionmentioning

confidence: 99%

Section: Paleoenvironmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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First Report of Gangamopteris rajaensis from Rajmahal Gondwana Basin, Jharkhand, India

Joshi¹,

Priya²

2021

Türkiye Jeoloji Bülteni / Geological Bulletin of Turkey

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“…Nevertheless, it is clear that in the Cambaí Grande Outcrop, the Gangamopteris dominates the glossopterid assemblage both in number of specimens and morphospecies. This dominance of Gangamopteris over Glossopteris is typically recorded in associations found in Itararé Group and has been used as an indicator of older stratigraphic position within the "Glossopteris Flora" succession, such as in the Paraná Basin (Rösler, 1978;Bernardes-de-Oliveira, 1980;Iannuzzi and Souza, 2005) and in India, where this same dominance of Gangamopteris is marked in Talchir and Karhabari formations, and the lower part of the Barakar Formation (Pant and Singh, 1968;Chandra, 1991;Maheshwari, 1991;Tewari and Srivastava, 2000;Maheshwari and Bajpai, 2001;Tewari, 2007Tewari, , 2008Srivastava and Agnihotri, 2010;Singh et al, 2012;Tewari et al, 2012). Similar pattern with Gangamopteris predominating in lower (Permian) stratigraphic intervals is also seen in Australia (Retallack, 1980;McLoughlin, 1994aMcLoughlin, , 1994b.…”

Section: Final Remarksmentioning

confidence: 99%

Revaluation of the Glossopterids from the Lower Permian of Cambaí Grande Outcrop, Paraná Basin, RS

Tybusch

Iannuzzi

Bernardes-de-Oliveira

et al. 2016

Geol. USP. Sér. Cient.

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O Afloramento Cambaí Grande está localizado no Município de São Gabriel, no Estado do Rio Grande do Sul, Brasil, sendo conhecido pela ocorrência de uma associação ímpar, composta de conchas de pelecípodes marinhos associados a restos vegetais de alguns elementos da “Flora Glossopteris”. O presente trabalho teve como principal objetivo a reavaliação da paleoflora de Cambaí Grande, bem como a reanálise do posicionamento estratigráfico do afloramento. Para tanto, foi realizada a revisão do material paleobotânico existente em coleções e uma redescrição da seção aflorante. A seqüência aflorante está dividida em duas seções bem definidas (uma inferior e outra superior), sendo que os megafósseis vegetais estudados encontram-se na parte basal da seção superior. Diferentemente do que se encontra estabelecido na literatura, as correlações com sondagens indicaram que o Afloramento Cambaí Grande posiciona-se estratigraficamente no intervalo correspondente à porção médio-superior da Formação Rio Bonito e não na porção superior do Grupo Itararé. Além disso, o conteúdo paleobotânico levantado por diversos autores compreendia, até o presente trabalho, a presença dos gêneros Gangamopteris, Samaropsis, Cordaicarpus e Cordaites, afora restos não identificados atribuídos a algas e a um cone de gimnosperma. Este estudo, no entanto, confirmou a presença do primeiro registro de folhas do tipo Glossopteris na paleoflora de Cambaí Grande, além da ocorrência, pela primeira vez, da espécie indiana Gangamopteris cyclopteroides Feistmantel, o que aumenta a possibilidade de correlação desta associação com as das paleofloras mais jovens, pertencentes à Formação Rio Bonito, e com aquelas dos estágios florísticos indianos.

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“…The taphofloras of the Talchir Stage are poor and suggest extreme cold conditions for plant growth, which probably took place during interglacial intervals or in periglacial non peat-generating environments (Chandra and Chandra, 1988;Chandra et al, 1992;Pant, 1996;Maheshwari and Bajpai, 2001;Srivastava and Agnihotri, 2010a). The Talchir flora (Gzhelian to Asselian) was characterized by a predominance of Gangamopteris species, both in number and diversity (Maheshwari, 1992;Pant, 1996;Agnihotri, 2010a, 2010b) followed by Noeggerathiopsis.…”

Section: The Brazilian and Indian Cisuralian Paleofloras And Their Simentioning

confidence: 99%

Floristic similarities of the Artinskian Siderópolis Member macroflora, Rio Bonito formation (Paraná Basin, Brazil) with Cisuralian paleofloras of India

Bernardes-de-Oliveira

Kavali

Mune

et al. 2016

Geol. USP. Sér. Cient.

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Esta contribuição visa à comparação entre a paleoflora do Membro Siderópolis e as paleofloras dos andares cisuralianos das bacias gondvânicas indianas, oferecendo assim critérios adicionais para a correlação das sucessões carvoeira gondvânicas ocidentais e orientais, no intervalo do Permiano inferior. Apesar do grande número de espécies em comum com as floras do Andar Karharbari (Sakmariano), a paleoflora Siderópolis apresenta maior percentagem e diversificação do gênero Glossopteris, menos expressivas nas floras do Andar Karharbari, enquanto o complexo Gangamopteris-Noeggerathiopsis, declinante na paleoflora do Membro Siderópolis, ainda domina nas associações do referido andar indiano. Entretanto, a composição florística do nível inferior do Andar Barakar (Artinskiano), apesar de apresentar menos espécies em comum com a paleoflora Siderópolis, caracteriza-se pelo domínio e diversidade do gênero Glossopteris sobre o complexo Gangamopteris-Noeggerathiopsis, que diminui tanto em diversidade como em abundância no Barakar inferior, semelhante ao que ocorre na paleoflora brasileira aqui estudada. O declínio do estágio icehouse e a posição latitudinal semelhante das regiões gondvânicas aqui comparadas, durante o Artinskiano, teriam atuado como fatores importantes no desenvolvimento de padrões de vegetação similares nas floras geradoras de carvões no Gondwana Ocidental (Brasil) e no Oriental (Índia).

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Morphological consequence of Gangamopteris McCoy in Glossopteris flora

Cited by 11 publications

References 11 publications

First Report of Gangamopteris rajaensis from Rajmahal Gondwana Basin, Jharkhand, India

First Report of Gangamopteris rajaensis from Rajmahal Gondwana Basin, Jharkhand, India

Revaluation of the Glossopterids from the Lower Permian of Cambaí Grande Outcrop, Paraná Basin, RS

Floristic similarities of the Artinskian Siderópolis Member macroflora, Rio Bonito formation (Paraná Basin, Brazil) with Cisuralian paleofloras of India

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