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Abstract Detail


Simpson, Michael [1], Johnson, Leigh [2], Villaverde Hidalgo, Tamara [3], Guilliams, Matt [4].

An update on a compendium of American amphitropical disjunctions and future directions.

At Botany 2016 a colloquium was held on botanical examples of American Amphitropical Disjunction (AAD), followed by 12 research papers on this topic in the December 2017 issue of the American Journal of Botany. Here we update a compendium of known examples of vascular plant divergences that resulted in an AAD distribution. We add six AAD examples and discuss updated values of divergence times, relative to taxonomic categories, plant duration, and bioregions. We also discuss features of character evolution and issues with defining the bioregions traditionally used in categorizing AAD examples: bipolar, desert, or temperate. Finally, we cite the need for additional molecular phylogenetic studies and the prospects for future studies, particularly detailed phylogeographic ones.

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Related Links:
AAD Working Group

1 - San Diego State University, Department Of Biology, San Diego, California, 92182, USA
2 - Brigham Young University, Deptartment Of Biology, 4102 LSB, Provo, UT, 84602, United States
3 - Universidad Pablo de Olavide, Department of Molecular Biology and Biochemical Engineering, Carretera de Utrera km 1, ES-41013, Seville, Spain
4 - Santa Barbara Botanic Garden, Department of Conservation and Research, Santa Barbara, CA, 93105, USA

American amphitropical disjunction
divergence time
North America
South America.

Presentation Type: Oral Paper
Session: 19, ASPT Cooley Awards I
Location: 110/Mayo Civic Center
Date: Tuesday, July 24th, 2018
Time: 10:30 AM
Number: 19010
Abstract ID:372
Candidate for Awards:George R. Cooley Award

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