The ultrastructure of Cyclusphaera psilata from the Cretaceous of Argentina

Thomas N. Taylor, Michael S. Zavada, Sergio Archangelsky

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


The fine structure and morphology of Cyclusphaera pollen collected from the early Cretaceous of Argentina is described. The diporate grains possess an exine structure that combines features of both angiosperms and gymnosperms, and raises questions as to the validity of using certain pollen characters in the identification of major taxonomic groups through time.

Original languageEnglish (US)
Pages (from-to)74-80
Number of pages7
Issue number1
StatePublished - Apr 1 1987
Externally publishedYes

Bibliographical note

Funding Information:
ACKNOWLEDGEMENTS A portion of this study wz1s completed while Archan- gelsky sewed as a Distinguished Visiting University Pro- fessor at The Ohio State University. This study bras sup- ported in part by funds from the National Science Foun- dation (BSR-8313786; BSR-8402813) and CONICET of Argentina.


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