Abstract
The species richness and geographic distribution of the family Aeshnidae (Odonata) in the state of Aguascalientes is presented. A total of 168 adult individuals from 55 localities were collected during a 12 months period between August 2006 and July 2007. They belong to four genera and seven species. The genus Rhionaeschna showed the highest number of species (3), followed by Anax (2), Aeshna (1) and Remartinia (1). Specific richness of the family Aeshnidae in the state of Aguascalientes corresponds to the 11.9% of all Odonata species recorded for the state and 23.3% of the species recorded of this family for México. The species accumulation curve is stabilized, but according to Chao 2, Jacknife 1 and Jacknife 2 non-parametric estimators, the sampling effort performed estimates between 80.3% and 97.5% of the species of this family that theoretically exist in the state of Aguascalientes. The localities that showed a higher species richness were La Rinconada, stream at Malpaso and Puente La Labor, all belonging to the municipality of Calvillo, and the Estación Biológica Agua Zarca (EBAZ) in the municipality of San José de Gracia. The distribution of the species reflects three regional patterns: Altiplano Mexicano, Sierra Madre Occidental and Neotropical.
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