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Proterozoic phytoplankton and timing of chlorophyte algae origins
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
2011 (English)In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 54, no 4, 721-733 p.Article in journal (Refereed) Published
Abstract [en]

Morphological and reproductive features and cell wall ultrastructure and biochemistry of Proterozoic acritarchs are used to determine their affinity to modern algae. The first appearance datum of these microbiota is traced to infer a minimum age of the divergence of the algal classes to which they may belong. The chronological appearance of microfossils that represent phycoma-like and zygotic cysts and vegetative cells and/or aplanospores, respectively, interpreted as prasinophyceaen and chlorophyceaen microalgae is related to the Viridiplantae phylogeny. An inferred minimum age of the Chlorophyte origin is before c. 1800 Ma, the Prasinophyceae at c. 1650 Ma and the Chlorophyceae at c. 1450 Ma. These divergence times differ from molecular clock estimates, and the palaeontological evidence suggests that they are older.

Place, publisher, year, edition, pages
2011. Vol. 54, no 4, 721-733 p.
Keyword [en]
Proterozoic, phytoplankton, acritarchs, algae, microfossils, phylogeny
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-156963DOI: 10.1111/j.1475-4983.2011.01054.xISI: 000292775500001OAI: oai:DiVA.org:uu-156963DiVA: diva2:435816
The origins and early diversification of photosynthetic microbiota and environmental change in Proterozoic and Cambrian
Swedish Research Council
Available from: 2011-08-20 Created: 2011-08-11 Last updated: 2014-12-09Bibliographically approved

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