Cuticular studies of the reproductive organs of Glossopteris. Part IV - Venustostrobus indicus sp. nov.

Authors

  • Shaila Chandra Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India
  • K.R. Surange Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1975.982

Abstract

A new species of Venustostrobus, V. indicus has been described in this paper. The female reproductive organ was preserved as carbonized compression under a long and narrow Glossopteris leaf to which it was attached. In order to study the fructification, three successive cellulose acetate pulls were taken. The first removed the leaf, the second removed the seeds, receptacle and a part of the protective bract, and the third pull removed the carbonized crust of only the bract. Cuticular structure of all these parts are described. Venustostrobus indicus is distinct from the other species, Venustostrobus diademus, in the leaf of Glossopteris to which it is attached and in the detailed structure of the bract, receptacle and the seeds. By taking out successive pulls it becomes clear that the bract and the seed bearing receptacle are two distinct and separate organs and that the receptacle occupies a position in between the leaf and the protective bract. Thus this study supports the interpretation we have given earlier to the multiovulate female reproductive organ of Glossopteris.

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References

Plumstead EP 1952. Description of two new genera and six new species of fructifications borne on Glossopteris leaves. Trans. geol. Soc. S. Afr. 60: 281-328.

Plumstead EP 1958. Further fructifications of the Glossopteridae and a provisional classification based on them. Ibid. 61: 51-76.

Surange KR & Shaila Chandra 1974. Fructifications of Glossopteridae from India. The Palaeobotanist. 21 (1): 1-17 (1972). https://doi.org/10.54991/jop.1972.1462

Surange KR & Shaila Chandra 1975. Morphology of the gymnosperms of the Glossopteris flora and their relationship. Palaeontographica. 149B: 153-180.

Shaila Chandra & Surange KR 1976. Cuticular studies of the reproductive organs of Glossopteris Part II – Cistella type fructification. Plumsteadiostrobus ellipticus gen. et sp. nov. attached on Glossopteris taenioides Feistmantel. The Palaeobotanist. 23 (3): 161-175. https://doi.org/10.54991/jop.1974.961

Shaila Chandra & Surange KR (in press). Cuticular studies of the reproductive organs of Glossopteris Part III – Two new female fructifications Jamabadostrobus and Venustostrobus – borne on Glossopteris leaves. Palaeontographica.

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Published

1975-12-31

How to Cite

Chandra, S., & Surange, K. (1975). Cuticular studies of the reproductive organs of Glossopteris. Part IV - Venustostrobus indicus sp. nov. Journal of Palaeosciences, 24(1-3), 149–160. https://doi.org/10.54991/jop.1975.982

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Research Articles

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