Devonian Spores of <Emphasis Type="Italic">Kryshtofovichia africani</Emphasis> Nikitin (Tracheophyta): Morphology and Ultrastructure期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Devonian Spores of <Emphasis Type="Italic">Kryshtofovichia africani</Emphasis> Nikitin (Tracheophyta): Morphology and Ultrastructure

Authors:	Email author" target="_blank">O?P?Telnova Email author J?E?A?Marshall

Institution:	1.Institute of Geology, Komi Scientific Center, Ural Branch,Russian Academy of Sciences,Syktyvkar,Russia;2.Sorokin Syktyvkar State University,Syktyvkar,Russia;3.University of Southampton,Southampton,UK

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.

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