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

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 ultrast...

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Bibliographic Details
Published in:Paleontological journal 2018-05, Vol.52 (3), p.342-349
Main Authors: Telnova, O. P., Marshall, J. E. A.
Format: Article
Language:English
Subjects:
Devonian
Earth and Environmental Science
Earth Sciences
Loosening
Microspores
Morphology
Paleontology
Spores
Ultrastructure
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Summary: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.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030118030152