Translator Disclaimer
1 December 2014 Small Antarctic Late Cretaceous Chorate Dinoflagellate Cysts: Biological and Palaeoenvironmental Affinities
Author Affiliations +
Abstract

Small spiny marine palynomorphs have been the focus of recent palynological studies since their high proportions in Antarctic Late Cretaceous and Cenozoic assemblages were noted. These palynomorphs were assigned to the dinoflagellate cyst Impletosphaeridium clavus and they were believed to have had an affinity with some modern round brown spiny cysts (RBSCs). Our study aims to analyse there together with potential modern analogues by comparing Late Cretaceous and Cenozoic Antarctic specimens with some RBSCs recorded from the Holocene of southern Argentina. We confirm several features in common between these specimens, although differences in processes and the cyst wall are observed. The species could have been produced by dinoflagellates similar to those that generate some RBSCs. Their abundance in the Late Cretaceous may have occurred in response to short term cooling pulses without development of sea-ice cover. Cenozoic records are considered to be reworked, restricting the stratigraphical range of Impletosphaeridium clavus.

©2014 AASP - The Palynological Society
Cecilia R. Amenábar, María Soledad Candel, and G. Raquel Guerstein "Small Antarctic Late Cretaceous Chorate Dinoflagellate Cysts: Biological and Palaeoenvironmental Affinities," Palynology 38(2), 303-323, (1 December 2014). https://doi.org/10.1080/01916122.2014.907829
Published: 1 December 2014
JOURNAL ARTICLE
21 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top