Geography Reference
In-Depth Information
(Maule and Valdivian Forest provinces) may result from dispersal rather than vi-
cariance, according to a cladistic biogeographic analysis based on weevil taxa
(Posadas and Morrone 2003). Two provinces are assigned to the Central Chilean
subregion: Coquimbo and Santiago.
The Subantarctic subregion comprises the austral Andes, from latitude 36°
south to Cape Horn, including the archipelago of southern Chile and Argentina.
Several authors have emphasized the distinctive character of the Subantarctic
biota and its links with the biota of the Austral continents, especially Australia
and New Zealand. Within the Andean region, the Subantarctic subregion is more
closely related to the Central Chilean subregion, although it has some Patagonian
cenocrons. In addition, the Subantarctic subregion shows relationships with the
Parana subregion that indicate a former connection. Six provinces are assigned
to the Subantarctic subregion: Juan Fernandez Islands, Maule, Valdivian Forest,
Magellanic Forest, Magellanic Moorland, and Falkland Islands.
The Patagonian subregion extends to southern Argentina, from central Men-
doza, widening through Neuquén, Río Negro, Chubut, and Santa Cruz, to northern
Tierra del Fuego, and reaches Chile in Aisén and Magallanes. The Patagonian
subregion comprises two provinces: Subandean Patagonia and Central Patago-
nia.
References
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Amorim, D. de S. and M. R. S. Pires. 1996. Neotropical biogeography and a method
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