IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Plant endemism in the Sierras of Córdoba and San Luis (Argentina): understanding links between phylogeny and regional biogeographical patterns
Autor/es:
CHIAPELLA J.; DEMAIO, P.
Revista:
PhytoKeys
Editorial:
Pensoft
Referencias:
Lugar: Praga; Año: 2015 vol. 47 p. 59 - 96
ISSN:
1314-2011
Resumen:
We compiled a checklist with all known endemic plants occurring in the Sierras of Córdoba and San Luis,an isolated mountainous range located in central Argentina. In order to obtain a better understanding ofthe evolutionary history, relationships and age of the regional flora, we gathered basic information on thebiogeographical and floristic affinities of the endemics, and documented the inclusion of each taxon inmolecular phylogenies. We listed 89 taxa (including 69 species and 20 infraspecific taxa) belonging to 53genera and 29 families. The endemics are not distributed evenly, being more abundant in the lower thanin the middle and upper vegetation belts. Thirty-two genera (60.3%) have been included in phylogeneticanalyses, but only ten (18.8%) included local endemic taxa. A total of 28 endemic taxa of the Sierras CSLhave a clear relationship with a widespread species of the same genus, or with one found close to the area.Available phylogenies for some taxa show divergence times between 7.0 ? 1.8 Ma; all endemic taxa aremost probably neoendemics sensu Stebbins and Major. Our analysis was specifically aimed at a particulargeographic area, but the approach of analyzing phylogenetic patterns together with floristic or biogeographicalrelationships of the endemic taxa of an area, delimited by clear geomorphological features, couldreveal evolutionary trends shaping the area.