Revision of Jurassic spores and pollen grains from Andigama, Ceylon

Jain, K.P.; Sah, S.C.D.

doi:10.54991/jop.1965.723

Cited by 3 publications

(10 citation statements)

References 4 publications

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“…cretaceus (1962) Rao (1943) resembles the present species in general organization but can be distinguished by its smaller size range. Podosporites sr• d. tripa.kshi described by Sah & Jain (1965) is circular and the exine of central body is infragranulose. P.…”

Section: Comparisonmentioning

confidence: 99%

“…I. incompositus Jain & Sah (1966) is 40-45 fL in size, trilete extending up to the equator and ornamented with thick, uneven ridges anastomosing to form an incomplete to complete reticulum on distal side. In some specimens this flattening also forms a sort of glllat(' structure.…”

Section: Genus -Ischyosporites Balme 1957mentioning

confidence: 99%

“…novo resembles the present species closely in general organization and sculptural elements but the latter can be differentiated by its inconspicuous central body and extension of the trilete rays only up to three-fourths radius. Sah & Jain, 1965. Podocarpidites sp. A Pl.…”

Section: Comparisonmentioning

confidence: 99%

“…P. grandis Sah & Jain (1965) is larger in size range while P. typicus Sah & Jain (1965) Coup. (1958) resembles the pres en t species in possessing vertically oval-subcircular central body but can be distinguished by its broad meshes which are 3-5 fL in size.…”

Section: Comparisonmentioning

confidence: 99%

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Palynological investigation of the Gondwana outcrop from Vemavaram with remarks on the age of the bed

Kar¹,

Sah²

1969

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The present paper deals with the dispersed spores-pollen recovered from Vemavaram shale (Jurassic) in the east coast Gondwanas, Andhra Pradesh, India. The palynological assemblage comprises 21 genera and 43 species, out of which two genera, viz. Ramanujamiaspora and Singhiapollis are new. The assemblage is dominated by gymnospermous pollen grains mosUy represented by Callialasporites, Sillghiapollis, Podocarpidites, Laricoidites and Araucariacites. The trilete spores are not common and mostly represented by Cyathidites and Ramanujamiaspora. The monolde and monocolpate pollen grains are rare. The trisaccate pollen grains are also meagrely represented by Podosporites. Operculate pollen grains are also rare and represented by Classopollis and Granuloperculatipollis. The present palynological assemblage has also been compared with the other known Jurassic assemblages of India. Palynological evidence indicates an Upper Jurassic age for the Vemavaram shales.

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Section: Comparisonmentioning

confidence: 99%

Section: Genus -Ischyosporites Balme 1957mentioning

confidence: 99%

Section: Comparisonmentioning

confidence: 99%

Section: Comparisonmentioning

confidence: 99%

See 2 more Smart Citations

Palynological investigation of the Gondwana outcrop from Vemavaram with remarks on the age of the bed

Kar¹,

Sah²

1969

JPS

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“…The general composition of the Sal~Range palynological assemblage shows consIderable diversitvfrom the Middle and Upper Jurassic assembfages described by Sah and Jain (1965), Jain and Sah (1966), Saad (1963), Pocock (1962) and others.. . The Middle-Upper JurassIc palynologIcal assemblages are characterized by the predominance of saccate pollen grains followed by the trilete spore genera, viz., Trilobosporites, C1'catricosispori tes, C ontignisporites and the meager reprE;sentation of Classopollis and Perinopollenites.…”

Section: Comparison With Jurassic Mioflorasmentioning

confidence: 86%

A lower Jurassic miospore assemblage from the variegated shale, Nammal Gorge, Salt Range (West Pakistan)

Jain¹,

Sah²

1968

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Present communication deals mainly with the morphological and taxonomical revision of the miospores previously recorded and described by Sah (1955) from the variegated shale sample, collected from Nammal Gorge, Salt Range, W. Pakistan. Apart from its botanical considerations, the spore-pollen assemblage has also been chronologically valued. It has been concluded on the miospores evidence that the Variegated Stage is older than the Rajmahal Intertrappean Series.

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Palynostratigraphy of coal deposits in Jabalpur stage, Upper Gondwana, India

Bharadwaj¹,

Kumar²,

Singh³

1970

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The quantitative and qualitative analyses of the dispersed miospores in the coal and coaly shales of the Jabalpur Stage, Jabalpur Series, Madhya Pradesh, India have been given. The miofloral assemblage consists of 58 spore genera and 103 species. It is characterized by the prominence of Araucariacites associated with the common occurrence of Callialasporites and Cycadopites. The cryptogamic components are poor in occurrence. A comparison of the mioflora with the Indian and extra Indian Upper Gondwana miofloras reveals that the Jabalpur Stage mioflora on one hand, closely resembles with the Rajmahal Hills mioflora (Basko and Sakrigalighat) but for the higher quantities of the cryptogamic spores and lesser frequency of Callialasporites, Cycadopites and Classopollis, and on the other hand it also resembles the Microflora Ila of Upper Jurassic age from W. Australia (Balme, 1957), the Upper Jurassic mioflora from Upper Katrol Shales of Kutch and the mioflora from Vemavaram shales. In view of the miofloristic similarity of the mioflora from Jabalpur Stage with those from palaeontologically dated Upper Jurassic strata in India as well as Australia, the former are conclusively dated as Upper Jurassic.

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Revision of Jurassic spores and pollen grains from Andigama, Ceylon

Cited by 3 publications

References 4 publications

Palynological investigation of the Gondwana outcrop from Vemavaram with remarks on the age of the bed

Palynological investigation of the Gondwana outcrop from Vemavaram with remarks on the age of the bed

A lower Jurassic miospore assemblage from the variegated shale, Nammal Gorge, Salt Range (West Pakistan)

Palynostratigraphy of coal deposits in Jabalpur stage, Upper Gondwana, India

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