Handapaphyllum- A new leaf type from the upper permian  of Orissa, India

Chandra, Shaila; Singh, K.J.

doi:10.54991/jop.1988.1609

Cited by 3 publications

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“…Consideration of such leaves under this group is also tentative as there are no reproductive structures or cuticular details to support their identification. Such ginkgoalean remains are more common in the extra-peninsular region than in the peninsular region, where their occurrence is sporadic The fossil re ma i ns of Ginkgophyllu In, PIa typhyllu In, Gondwanopbyton and Handapaphyllu m (Chandra & Singh, 1989) are reported from the Barakar and the Kamthi formations of the peninsular India With the present state of knowledge, it is very difficult to comment on the habit of the plants of thiS group. It can only be summarized on the basis of their sporadic occurrence that they grew in pockets and never formed a conspicuous vegetation of the forest in any formation.…”

Section: Coniferales-conifersmentioning

confidence: 99%

Changing patterns of the Permian Gondwana vegetation

Chandra¹

1991

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Floristics, ecology and vegetation through the Permian of peninsular India are summarised. Palynological, sedimentological and faunal data are also utilized in this study. The Permian vegetation of India, known as the Glossopteris flora, comprises fungi, bryophytes, lycophytes, arthrophytes, Filicales and gymnosperms. Some of the important plant types are reconstructed on the basis of available information. Five reconstructions are made depicting Talchir, Karharbari, Barakar, Kulti and Raniganj vegetation.

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Section: Coniferales-conifersmentioning

confidence: 99%

Changing patterns of the Permian Gondwana vegetation

Chandra¹

1991

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“…P ermian sediments pertaining to the Talcher Coalfield, Ib-River Coalfield and Mand-Raigarh Coalfield, all parts of the Mahanadi Basin, have been thoroughly investigated by a number of workers over the past fifty years {Subramanian and Rao (1960); Khan (1969); Surange and Maheshwari (1970); Chandra (1973a, b, c, 1974a, b, c, d); Maithy (1977); Chandra and Surange (1977); Chandra andRigby (1981, 1983); Chandra (1984); Pant et al (1985); Chandra and Singh (1986, 1988, 1989; Singh and Chandra (1987, 1990, b, 1999, 2000; ; Goswami and Singh (2010); Goswami et al (2006a, b); Singh et al, (2003Singh et al, ( , b, c, 2007}. However, a very important coalfield within the Mahanadi Basin, i.e.…”

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confidence: 99%

Palaeobiodiversity of the Lower Gondwana rocks in the Korba Coalfield, Chhattisgarh, India and observations on the genus Gangamopteris McCoy

Singh¹,

Saxena²,

Goswami

2012

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The Korba Coalfield occupies the south-central part of Son-Mahanadi Master basin and is situated in the Korba and Bilaspur districts of Chhattisgarh State. With five open cast mines (Gevra, Dipika, Manikpur, Kusmunda and Laxman) spreading over 530 sq. kms, this coalfield is the biggest coal producing unit in India, however it was never explored for megafloral studies. Extensive investigations were recently conducted in this coalfield to discover the fossiliferous beds in the Lower Gondwana deposits and as a result a large number of plant fossils were recovered from these collieries and their extension sites belonging to the Barakar Formation. The complete flora includes 38 taxa, representing 13 genera of the orders Equisetales, Cordaitales and Glossopteridales. The order Glossopteridales is highly diversified with 34 taxa and the genus Glossopteris with 22 species dominates the flora followed by the genera Vertebraria, Sakoarota (equisetalean stems), Cordaites, Dictyopteridium, scale leaves of fertile organs, Gangamopteris, Noeggerathiopsis, Euryphyllum and Rubidgea. This is the first ever collection and record of any mega plant fossil from this coalfield. The groups Lycopodiales, Sphenophyllales, Filicales, Ginkgoales, Cycadales and Coniferales are completely absent in this area which shows that the area might not be adequately cool and humid to facilitate the growth of these shade loving under-story plants. The genus Cordaites, which is a northern hemisphere taxon has been reported along with Glossopteris floral elements. An equisetalean genus Sakoarota, described from Madagascar has been reported for the first time from the Indian Gondwana. The genus Gangamopteris comprising six species, viz. G. cyclopteroides, G. cyclopteroides var. subauriculata, G. angustifolia, G. rajaensis, G. clarkeana and Gangamopteris sp. has been systematically described and discussed in this paper. The occurrence of Rubidgea, Euryphyllum, Noeggerathiopsis, Cordaites and Gangamopteris along with Glossopteris is indicative of the presence of Karharbari sediments (Early Permian=Lower Artinskian) in the lower part of the Barakar Formation exposed in the Gevra and Dipika collieries. The recovered plant assemblage indicates an Early Permian age, Lower Artinskian (Early Barakar) in the case of the Gevra and Dipika collieries and Upper Artinskian (Late Barakar) for the Manikpur, Kusmunda and Laxman collieries.

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“…Equivalent formations are Nishatbagh and Mamal (Kashmir Valley, Pir Panjal and ParauthochtOne), KhelongjRilu (eastern Himalaya). After the initial report of plant fossils from the Raniganj Coalfield (Brongniart, 1828), mega-and micro-fossils have been reported from almost all the horizons (see Lakhanpal, Maheshwari & Awasthi, 1976;Chandra & Singh, 1989;Maheshwari, Singh & Bajpai, 1989;Bajpai & Tewari, 1990;Chandra, Srivastava & Singh, 1990;Prasad & Maithy, 1990;Singh & Bajpai, 1990;Singh & Chandra, 1990;Bajpai & Maheshwari, 1991;Chandra & Tewari, 1991;Srivastava, 1991;Kapoor, Bajpai & Maheshwari, 1992;Maheshwari & Bajpai, 1992, etc. ).…”

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Provincialism in Gondwana floras

Maheshwari¹

1991

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The Gondwana sediments of India, ranging from Asselian to Rhaetian in age, contain remnants of a unique flora that in general composition is uniform all over. Two basic floral assemblages, i.e., Glossopteris-Assemblage and Dicroidium-Assemblage, can be recognized through Permian and Triassic, respectively. A synthesis of data on the distribution of plant fossils in different formations of the Gondwana Supergroup brings out an incipient provincialism throughout, particularly in the Barakar Formation. It is not yet understood if this provincialism is apparent or real.

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Handapaphyllum- A new leaf type from the upper permian of Orissa, India

Abstract: A new genus Handapaphyllum is established for fan-shaped, petiolar leaves having symmetrically lobed and dissected lamina with 6-8 dichotomous parallel running veins from the Kamthi Formation of Handapa, Orissa.

Cited by 3 publications

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Changing patterns of the Permian Gondwana vegetation

Changing patterns of the Permian Gondwana vegetation

Palaeobiodiversity of the Lower Gondwana rocks in the Korba Coalfield, Chhattisgarh, India and observations on the genus Gangamopteris McCoy

Provincialism in Gondwana floras

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