%0 Journal Article
%T Licofitas (Equisetopsida: Lycopodiidae) de las Sierras Centrales de Argentina: un enfoque panbiogeogr芍fico Lycophytes (Equisetopsida: Lycopodiidae) from the Central Hills of Argentina: a panbiogeographic approach
%A Marcelo D Arana
%A Juan J Morrone
%A M車nica Ponce
%A Antonia J Oggero
%J Gayana. Botanica
%D 2011
%I Universidad de Concepci車n
%X Las licofitas son las plantas vasculares m芍s antiguas, comprenden a las Lycopodiaceae, Iso taceae y Selaginellaceae, constituyendo un grupo monofil谷tico separado del resto de los helechos y plantas con semilla. Debido a su falta de relaciones coevolutivas con vectores bi車ticos, su monofilia y su patr車n morfol車gico altamente estable son especialmente aptas para establecer patrones biogeogr芍ficos. Con este fin se construyeron los trazos individuales de los siete taxones encontrados. El trazo generalizado resultante indica que las sierras centrales de Argentina constituyen el extremo austral de un componente bi車tico neotropical, presentando una relaci車n m芍s estrecha con las Sierras Subandinas y los Andes bolivianos y peruanos que con el Chaco (donde est芍n incluidas), bordeando la Zona de Transici車n Sudamericana, la que, caracterizada por ambientes 芍ridos, constituye una barrera exitosa para las licofitas, separando la regi車n austral de Argentina y Chile del resto de Am谷rica del Sur. Lycophytes are the most ancient lineage of vascular plants and include Lycopodiaceae, Iso taceae and Selaginellaceae. They are a monophyletic group separated from ferns and seed plants and are especially useful for establishing biogeographic patterns, due to their lack of coevolutionary relationships with biotic vectors, their monophyly and their remarkable morphological conservatism. The individual tracks of the seven taxa of lycophytes from central Argentina were drawn and the generalized track obtained shows that the central hills of Argentina are the austral extreme of the distribution of a Neotropical biotic component, with closer relationships with the Subandean hills and the Bolivian and Peruvian Andes than to the Chaco (where they are included), bordering the South American Transition Zone. The latter is characterized by arid environments and is a successful barrier for Lycophytes, separating the austral region of Argentina and Chile from the other parts of South America.
%K Biogeograf赤a
%K Lycopodiaceae
%K Selaginellaceae
%K Iso taceae
%K Chaco serrano
%K Biogeography
%K Lycopodiaceae
%K Selaginellaceae
%K Iso taceae
%K Chaco serrano
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000100002