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Abstract Detail

Evolution and Diversification in the Sapindales

Pell, Susan K. [1], Mitchell, John D. [2].

Evolutionary trends in Anacardiaceae inferred from nuclear and plastid molecular data and morphological evidence.

Anacardiaceae includes approximately 800 species in 82 genera and is well known for its cultivated edible fruits and seeds (mangos, pistachios and cashews) and dermatitis causing taxa (poison ivy, poison oak, etc.). Since the publication of our subfamilial classification last year, we have deepened our understanding of evolutionary relationships within the family through expanded phylogenetic analyses and our completion of a generic taxonomic treatment of the family. We further evaluated infrafamilial relationships and interfamilial relationships (samples of Burseraceae, Sapindaceae, Meliaceae, and Rutaceae were included) using combined nrDNA (ETS) and cpDNA (rps16, trnLF) sequences. Evolutionary trends in the cashew family will be highlighted in the context of structural characteristics and the elucidated phylogenies. Based on these reconstructions and current knowledge of morphological and anatomical attributes, we recommend that Buchanania be recognized in subfamily Spondioideae. Evidence of paraphyly will be discussed for Astronium, Baronia, Protorhus, and Rhus. Molecular evidence also suggests a close relationship between Englerís tribes Anacardieae (excluding Buchanania and Androtium) and Semecarpeae within subfamily Anacardioideae. Morphological evidence for taxa not represented in the phylogenies indicates that several taxa are in need of further taxonomic revision or subfamilial reassignment including: Androtium, Allospondias, Campnosperma, Pentaspadon, and Spondias.

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1 - Brooklyn Botanic Garden, 1000 Washington Ave, Brooklyn, NY, 11225, USA
2 - New York Botanical Garden, Institute of Systematic Botany, 200th St. and Southern Blvd, Bronx, NY, 10458, USA


Presentation Type: Symposium or Colloquium Presentation
Session: C01
Location: Boulevard B/Hilton
Date: Tuesday, July 10th, 2007
Time: 9:00 AM
Number: C01005
Abstract ID:1087

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