@ARTICLE{TreeBASE2Ref18646, author = {Rodrigo Duno de Stefano and Germ?n Carnevali Fern?ndez-Concha and Lilia Lorena Can-Itza and Matthew T. Lavin}, title = {The Morphological and Phylogenetic Distinctions of Coursetia greenmanii (Leguminosae): Taxonomic and Ecological Implications.}, year = {2010}, keywords = {}, doi = {10.1600/036364410791638360}, url = {}, pmid = {}, journal = {Systematic Biology}, volume = {35}, number = {2}, pages = {286--295}, abstract = {A new combination, Coursetia greenmanii (Leguminosae, Papilinioideae, tribe Robinieae), is proposed because analysis of nucleotide sequence data from the nuclear ribosomal internal transcribed spacer region resolves a clade that is phenotypically distinct and ecologically and geographically centered in lowland seasonally dry tropical vegetation of the region of the Yucatan Peninsula. The well supported monophyly of the ribosomal sequences sampled from Coursetia greenmanii suggests that this species has had a long history independent of other close relatives including the sympatric Coursetia caribaea, which shows niche conservatism to the same seasonally dry tropical vegetation. Coalescence of intraspecific samples of ribosomal sequences from this narrowly distributed species is possibly related to the high levels of dispersal limitation within seasonally dry tropical forests. The geographical phylogenetic structure found for Coursetia greenmanii represents the general case for species of the genus Coursetia and closely related genera of the tribe Robinieae, most of which coalesce with respect to nuclear ribosomal sequence variation and are geographically concentrated in relatively small subregions of seasonally dry Neotropical vegetation that is rich in cacti and other succulent species.} }

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