Paleontological Journal

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

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

  • O. P. Telnova
  • J. E. A. Marshall


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.


Kryshtofovichia africani megaspores microspores morphology ultrastructure Devonian 


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© 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

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