Recent Topics Posters
Ruhfel, Brad , Stevens, Peter , Davis, Charles C. .
Combined morphological and molecular phylogeny of the clusioid clade (Malpighiales) and the placement of the Cretaceous macrofossil Paleoclusia.
The clusioid clade is a member of the large rosid order Malpighiales and contains approximately 1900 species distributed among five families: Bonnetiaceae, Calophyllaceae, Clusiaceae sensu stricto (s.s.), Hypericaceae, and Podostemaceae. Despite a recent successful effort to clarify their phylogenetic relationships using molecular data, no molecular data are available for several critical taxa. Among others, these include Hypericum ellipticifolium (previously placed in the monotypic genus Lianthus), Lebrunia, Neotatea, Thysanostemon, and the extinct taxon from the Turonian (~90 Ma), Paleoclusia chevalieri. We constructed a morphological data set including 69 characters and 81 clusioid species/species groups and analyzed these data using parsimony, maximum likelihood, and Bayesian inference to determine the placement of these taxa. The phylogeny inferred from the morphological data was poorly resolved, but largely in agreement with the phylogeny inferred from molecular data alone. Our combined analyses of the molecular and morphological data largely confirm earlier hypotheses of relationships for the 22 included extant taxa that were scored only for morphology. Furthermore, these results suggest that Paleoclusia is weakly placed as a member of Clusiaceae s.s. Our ancestral character state reconstructions further corroborate this placement and shed light on the evolution of traits that have been historically important for circumscribing clusioid taxa.
Log in to add this item to your schedule
B. R. Ruhfel website
Davis Lab website
1 - University Of Florida, Department Of Biology, P.O. Box 118525, Carr Hall, Room 217, Gainesville, FL, 32611, USA
2 - Missouri Botanical Garden, PO Box 299, St. Louis, MO, 63166-0299, USA
3 - Harvard University, Organismic and Evolutionary Biology, Harvard University Herbaria, 22 Divinity Ave., Cambridge, MA, 02138, USA
Presentation Type: Recent Topics Poster
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM