Advertisement

Paleontological Journal

, Volume 52, Issue 3, pp 342–349 | Cite as

Devonian Spores of Kryshtofovichia africani Nikitin (Tracheophyta): Morphology and Ultrastructure

Article

Abstract

The morphology and ultrastructure of spores of the Devonian plant Kryshtofovichia africani Nikitin are examined. The structure of ultrathin exine megaspores of K. africani is established. The exine consists of two layers: granular ectexine and lamellate endexine. Microspores have a lamellate ultrastructure with a trend toward loosening and formation of the granular structure towards the ectexine outer part. Heterospory of K. africani is apparent in both morphological characters and sporoderm ultrastructure of micro- and megaspores.

Keywords

Kryshtofovichia africani megaspores microspores morphology ultrastructure Devonian 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Allen, K.C., Lower and Middle Devonian spores of north and central Vestspitsbergen, Palaeontology, 1965, vol. 8, pp. 687–748.Google Scholar
  2. Chaloner, W.G., Devonian megaspores from Arctic Canada, Palaeontology, 1959, vol. 1, pp. 321–332.Google Scholar
  3. Lu, L., On the occurrence of Archaeoperisaccus in E. Yunnan, Acta Palaeontol. Sin., 1980, vol. 19, pp. 500–504.Google Scholar
  4. McGregor, D.C., Devonian plant fossils of the genera Kryshtofovichia, Nikitinsporites, and Archaeoperisaccus, Canada Geol. Surv. Bull., 1969, vol. 182, pp. 91–93.Google Scholar
  5. Meier-Melikyan, N.R., Morphology of spores and pollen, in Metodicheskie aspekty palinologii (Methodical Aspects of Palynology), Moscow: Nedra, 1987, pp. 17–40.Google Scholar
  6. Naumova, S.N., Spore–pollen assemblages from the Upper Devonian of the Russian Platform and their importance for stratigraphy, Tr. Inst. Geol. Nauk Geol. Ser., 1953, vol. 143, no. 60, pp. 1–199.Google Scholar
  7. Nikitin, A.P., Fossil plants from the Petino Horizon of the Devonian of the Voronezh Region, Izv. Akad. Nauk SSSR Ser. Geol., 1934, no. 7, pp. 1079–1090.Google Scholar
  8. Pettitt, J.M., A new interpretation of the structure of the megaspore membrane in some gymnospermous ovules, J. Linn. Soc. (Bot.) London, 1966a, vol. 59, pp. 253–263.CrossRefGoogle Scholar
  9. Pettitt, J.M., Exine structure in some fossils and Recent spores and pollen as revealed by light and electron microscopy, Bull. Brit. Mus. Natur. Hist. (Geol.), 1966b, vol. 13, pp. 221–257.Google Scholar
  10. Potonie, R., Synopsis der Gattunger der Sporae dispersae: Teil II, Beihefte Geol. Jahrb. Hannover, 1958, no. 31, p. 188.Google Scholar
  11. Taylor, T.N., Maihle, H.J., and Hills, L.V., Morphological and ultrastructural features of Nikitinsporites canadensis Chaloner, a Devonian megaspore from the Frasnian of Canada, Rev. Palaeobot. Palynol., 1980, vol. 30, nos. 1–2, pp. 89–99.CrossRefGoogle Scholar
  12. Telnova, O.P., Miospory iz sredne-verkhnedevonskikh otlozhenii Timano-Pechorskoi neftegazonosnoi provintsii (Miospores from the Middle—Upper Devonian Deposits of the Timan–Pechora Oil-and-Gas-bearing Provinces), Yekaterinburg: Ural. Otd. Ross. Akad. Nauk, 2007.Google Scholar
  13. Telnova, O.P. and Meier-Melikyan, N.R., Spory pogranichnykh otlozhenii devona i karbona Timano-Pechorskoi provintsii (Spore from the Devonian—Carboniferous Boundary Beds of the Timan–Pechora Province), Leningrad: Nauka, 1993.Google Scholar
  14. Thomas, B.A. and Blackburn, V., An ultrastructural study of some Carboniferous in situ megaspores assignable to Lagenicula horrida and Lagenoisporites rugosus, Pollen et Spores, 1987, vol. 29, no. 4, pp. 435–447.Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Institute of Geology, Komi Scientific Center, Ural BranchRussian Academy of SciencesSyktyvkarRussia
  2. 2.Sorokin Syktyvkar State UniversitySyktyvkarRussia
  3. 3.University of SouthamptonSouthamptonUK

Personalised recommendations