Biogeographical revision of Argentina (Andean and Neotropical Regions): an analysis using freshwater fishes

LÓPOEZ, HUGO L.; MENNI, ROBERTO C.; DONATO, MARIANO; MIQUELARENA, AMALIA M.

JOURNAL OF BIOGEOGRAPHY

Año: 2008 vol. 35 p. 1564 - 1579

0305-0270

Aim To provide an objective geographic framework displaying the distribution patterns of freshwater fishes from Argentina. patterns of freshwater fishes from Argentina. patterns of freshwater fishes from Argentina. To provide an objective geographic framework displaying the distribution patterns of freshwater fishes from Argentina. Location Argentina, southern South America.Argentina, southern South America. Methods Parsimony analysis of endemicity (PAE) and similarity and cluster analyses were applied to presence and absence data on 440 fish species from 52 localities in Argentina. Both 50% majority consensus and strict consensus analyses were made in the first case, and the Jaccard similarity index was used in the second. analyses were applied to presence and absence data on 440 fish species from 52 localities in Argentina. Both 50% majority consensus and strict consensus analyses were made in the first case, and the Jaccard similarity index was used in the second. analyses were applied to presence and absence data on 440 fish species from 52 localities in Argentina. Both 50% majority consensus and strict consensus analyses were made in the first case, and the Jaccard similarity index was used in the second. Parsimony analysis of endemicity (PAE) and similarity and cluster analyses were applied to presence and absence data on 440 fish species from 52 localities in Argentina. Both 50% majority consensus and strict consensus analyses were made in the first case, and the Jaccard similarity index was used in the second. Results Five ichthyogeographic provinces are described based on a PAE of the 52 localities. A cluster analysis provided similar results. 52 localities. A cluster analysis provided similar results. 52 localities. A cluster analysis provided similar results. Five ichthyogeographic provinces are described based on a PAE of the 52 localities. A cluster analysis provided similar results. Main conclusions The following zoogeographic provinces are proposed for Argentine freshwater fish fauna following the International Code of Area Nomenclature: Andean Cuyan, Patagonian, Aymaran, Great Rivers and Pampean. The former two are placed within the Andean Subregion of the Austral Region, and the latter three within the Neotropical Subregion of the Holotropical Region. These provinces, based on results coinciding with PAE and cluster analyses, represent the first classification of Argentine provinces based on objective methods. Some small regions of endemism and some localities remain separated from the proposed regions. The new scheme includes valuable empirical information from previous schemes, and is in agreement with 3 ecological zones and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. Argentine freshwater fish fauna following the International Code of Area Nomenclature: Andean Cuyan, Patagonian, Aymaran, Great Rivers and Pampean. The former two are placed within the Andean Subregion of the Austral Region, and the latter three within the Neotropical Subregion of the Holotropical Region. These provinces, based on results coinciding with PAE and cluster analyses, represent the first classification of Argentine provinces based on objective methods. Some small regions of endemism and some localities remain separated from the proposed regions. The new scheme includes valuable empirical information from previous schemes, and is in agreement with 3 ecological zones and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. Argentine freshwater fish fauna following the International Code of Area Nomenclature: Andean Cuyan, Patagonian, Aymaran, Great Rivers and Pampean. The former two are placed within the Andean Subregion of the Austral Region, and the latter three within the Neotropical Subregion of the Holotropical Region. These provinces, based on results coinciding with PAE and cluster analyses, represent the first classification of Argentine provinces based on objective methods. Some small regions of endemism and some localities remain separated from the proposed regions. The new scheme includes valuable empirical information from previous schemes, and is in agreement with 3 ecological zones and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. The following zoogeographic provinces are proposed for Argentine freshwater fish fauna following the International Code of Area Nomenclature: Andean Cuyan, Patagonian, Aymaran, Great Rivers and Pampean. The former two are placed within the Andean Subregion of the Austral Region, and the latter three within the Neotropical Subregion of the Holotropical Region. These provinces, based on results coinciding with PAE and cluster analyses, represent the first classification of Argentine provinces based on objective methods. Some small regions of endemism and some localities remain separated from the proposed regions. The new scheme includes valuable empirical information from previous schemes, and is in agreement with 3 ecological zones and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. and other environmental arrangements proposed earlier. 3 ecological zones and other environmental arrangements proposed earlier.