Tiffney, Bruce , Proft, Sarah .
The identification of eroded nuts of Pterocarya Kunth (Juglandaceae) in the fossil record.
Pterocarya is represented by five living Old World species and has an extensive Paleocene through Pliocene (North America) and Pleistocene (Eurasia) history, including at least 30 reported species of fruits. In life, the fruits possess wings which contribute valuable taxonomic characters. However, many fossil fruits have been eroded and possess only the characters of the endocarp. A comparative study of the morphological variation of the endocarps of the living species suggests it is impossible to recognize wingless endocarps below the sectional level of the genus. We propose that two form species representing the sectional affinities of fossil Pterocarya endocarps be recognized for fossil endocarps lacking wings, and describe a new occurrence of Pterocarya from the Miocene of Maryland.
1 - University of California Santa Barbara, Geological Sciences, Santa Barbara, California, 93106, USA
2 - University of California Santa Barbara, College of Creative Studies, Santa Barbara, California, 93106, USA
Presentation Type: Paper
Location: Maybird (Cliff Lodge)
Date: Monday, August 2nd, 2004
Time: 11:00 AM