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The systematic position of Ehretia cortesia nom. nov. (≡ Cortesia cuneifolia: Ehretiaceae, Boraginales) inferred from molecular and morphological data

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Abstract:

The systematic position of Argentinean Cortesia cuneifolia (Ehretiaceae, Boraginales) is investigated based both on morphological and on ITS1 sequence data. Inferred from a molecular phylogeny, monotypic Cortesia is not isolated from other taxa of Ehretiaceae as previously suggested, but is nested within Ehretia. Cortesia shares a two-parted endocarp with the Ehretia II subclade (including Ehretia microphylla ), which is considered as a derived condition within Ehretiaceae and is the most striking indication for a close relationship of the two. ITS1 sequence data and specialised leaf morphology suggest that Ehretia microphylla is probably the sister species of Cortesia cuneifolia, for which a new name is proposed: Ehretia cortesia.

Keywords: FRUIT; ITS1; MORPHOLOGY; PHYLOGENY; SECONDARY STRUCTURE; TAXONOMY

Document Type: Research Article

Affiliations: 1: Institut für Biologie - Systematische Botanik und Pflanzengeographie, FU Berlin, Altensteinstraße 6, D-141 95 Berlin, Germany and Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri 63166, U.S.A. 2: Institut für Biologie - Systematische Botanik und Pflanzengeographie, FU Berlin, Altensteinstraße 6, D-141 95 Berlin, Germany

Publication date: November 1, 2004

iapt/tax/2004/00000053/00000004/art00006
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