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. 2010 Sep 24;329(5999):1621.
doi: 10.1126/science.1193108.

Eocene Patagonia fossils of the daisy family

V D Barreda  1 , L Palazzesi, M C Tellería, L Katinas, J V Crisci, K Bremer, M G Passalia, R Corsolini, R Rodríguez Brizuela, F Bechis
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Eocene Patagonia fossils of the daisy family

V D Barreda et al. Science. .

Abstract

Fossil capitula and pollen grains of Asteraceae from the Eocene of Patagonia, southern Argentina, exhibit morphological features recognized today in taxa, such as Mutisioideae and Carduoideae, that are phylogenetically close to the root of the asteracean tree. This fossil supports the hypothesis of a South American origin of Asteraceae and an Eocene age of divergence and suggests that an ancestral stock of Asteraceae may have formed part of a geoflora developed in southern Gondwana before the establishment of effective dispersal barriers within this landmass.

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  • Botany. The rise of sunflowers.
    Stuessy T. Stuessy T. Science. 2010 Sep 24;329(5999):1605-6. doi: 10.1126/science.1195336. Science. 2010. PMID: 20929832 No abstract available.

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