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Passiflora subgenus Decaloba (DC.) Rchb. (Passifloraceae) in Brazil: Patterns of geographic distribution

Tuesday, 25 June 2013: 17:40
South Hall (Herradura San Jose)
Michaele Alvim Milward-de-Azevedo , Ciências Administrativas e do Ambiente, Universidade Federal Rural do Rio de Janeiro/Instituto Três Rios, Brazil
José Fernando Andrade Baumgratz , Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Brazil
Obtainment and provision of updated data on the geographical distribution of species and their patterns of distribution are of great importance for biodiversity conservation. The distributions reflect connections and past climates, or limitations imposed by this environment, such as climate change. The origin of the geographical distribution seeks to understand the processes involved in the origin of species, their dispersal or reduction. Decaloba is a tropical and subtropical subgenus, with 235 species, characterized by herbaceous vines, stipules linear-subulate or ovate-auriculate, leaf blades with ocelli present or lacking, small flowers (< 4 cm diam.), corona uniseriate or biseriate and operculum plicate. The aim of this study was to survey the geographical distribution of 20 taxa of the subgenus Decaloba occurring in Brazil, highlighting endemic taxa, threatened and/or rare, and establish the patterns of geographic distribution relating them to their habitats. The mapping of the geographical distribution of each taxon was based in the localities mentioned by collectors and examination of herbaria material. The data were plotted on maps, using DIVA-GIS program. Eight species are exclusively Brazilian, two are endemic, P. candolei Triana & Planch. is a new record in Brazil, and the other nine taxa are widely distributed in Latin America or South America. The greater range of taxa is found in the Atlantic Forest domain, but this result does not indicate that the Amazon forest and/or savanna is less representative, but there is a big gap in these areas.