Entomofauna de bosques nativos del Chaco Húmedo (Provincias de Chaco y Formosa, Argentina): aportes al conocimiento de su diversidad

the surveys about entomological biodiversity are scarce for the argentinian humid chaco. in order to contribute to the knowledge of the entomophauna, the transecta sampling method (100x2 m, with 5x2 m sections) was conducted at the localities of pampa del indio (chaco province) and ibarreta (formosa province), during the 2006- 2007 summer, with two transects per site. the specimens were analyzed taxonomically and grouped according to their trophic habits. a total of 1,575 individuals were collected, belonging to 17 orders. hymenoptera was, numerically, the most important order, with 63 % of the captured specimens. the highest diversity corresponded to coleoptera, with 18 families, followed by hymenoptera (12 families). the percentage of complimentary families between both localities was 62%. six trophic groups recognized for insects were present.