You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Potamogetonaceae Fossil Fruits from the Tertiary of Patagonia, Argentina
Maria A. Gandolfo, Maria del C. Zamaloa, Néstor R. Cúneo and Ana Archangelsky
International Journal of Plant Sciences
Vol. 170, No. 3 (March/April 2009), pp. 419-428
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/10.1086/595290
Page Count: 10
You can always find the topics here!Topics: Fossils, Endocarp, Germination, Pollen, Genera, Fresh water, Palynology, Beak, Taxa, Green algae
Were these topics helpful?See something inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
The subcosmopolitan and aquatic monocot family Potamogetonaceae Berch. and J. Presl 1823 comprises extant and fossil genera. Its known fossil record is composed mainly of fruit remains, and it comes only from Eocene to Pliocene sediments of the Northern Hemisphere (Europe, Saudi Arabia, and China). Recently, several fruits sharing characters with living and fossil Potamogetonaceae genera have been found within the Paleogene Baibián Beds, Chubut, Patagonia, Argentina. Fossils were collected at the Puesto Baibián locality, which outcrops at the eastern sector of the Sierra de La Colonia. Fossils are impressions/compressions of infructescences and isolated fruits and seeds preserved as molds and casts. The infructescences are probably racemes bearing fruits placed most likely in whorls of four each. Isolated fruits are small one‐seeded bisymmetrical endocarps. Palynological studies of the beds show the presence of an assemblage similar to those found in sediments of the Northern Hemisphere where Potamogetonaceae fossil fruits were previously recorded. This report constitutes the first fossil record of Potamogetonaceae for the Southern Hemisphere.
© 2009 by The University of Chicago. All rights reserved.