Resumo

ANDRES HERNANDEZ, Agustina Rosa; MORRONE, Juan J; TERRAZAS, Teresa  e  LOPEZ MATA, Lauro. Track analysis of the mexican species of Rhus subgenre Lobadium (ANGIOSPERMAE: ANACARDIACEAE). INCI [online]. 2006, vol.31, n.12, pp.900-904. ISSN 0378-1844.

The subgenus Lobadium of the genus Rhus contains about 25 species, distributed mainly in Mexico. The geographic distribution of these species was analyzed through a panbiogeographic approach, based on a parsimony analysis of endemicity. Distribution of subgenus Lobadium lies principally in the Mexican Transition Zone, constituting a Nearctic element. Three generalized tracks were identified: 1) California-Baja California; 2) Mexican Pacific Coast-Sierra Madre Occidental; and 3) Tamaulipas-Sierra Madre del Sur-Transmexican Vocanic Belt- Mexican Plateau-Sierra Madre Oriental. The first one coincides with the Californian dominion, whereas the two others confirm the hipothesis of the Mexican Transition Zone, in the mountain areas of Mexico, where Nearctic and Neotropcial biotic elements overlap.

Palavras-chave : Anacardiaceae ; Lobadium ; Neártico ; Rhus ; Styphonia ; Terebinthifolia ; Zona de Transición Mexicana .