Pimplinae, Poemeniinae e Rhyssinae (Hymenoptera, Ichneumonidae) na Unidade Ambiental de Peti (Cemig), Minas Gerais

Abstract

The composition and seasonality of the taxocenosis from subfamilies of Pimplinae, Poemeniinae and Rhyssinae (Hymenoptera: Ichneumonidae) were analysed in the Environmental Unit of Peti (Cemig), Minas Gerais State. Two Malaise traps (model Townes), were used, located one in area of humid forest (place A), and other in area of brazilian savanna transition with the forest (place B). The entomological material used was weekly collected in the period of April 2002 to April 2003. Were capture 475 individuals belonging to 14 genus and 39 species. Pimplinae was represented by 12 genus, 34 species and 456 specimens. Poemeniinae was represented by one genus with one single species and 10 specimens, and Rhyssinae was represented by nine individuals belonging to four species of one single genus. The most abundant genus were Pimplinae, represented by Neotheronia with 12 species and Hymenoepimecis with four species. The genus with larger number of individuals was Pimpla with 253 copies, representing 52% of the total collected and 55% of the total Pimplinae, and Neotheronia with 136 collected copies that corresponded to 29% of the total and 30% of Pimplinae. The most abundant species were Pimpla croceiventris with 192 individuals and Pimpla golbachi with 60. For place A, 20 species were considered rare and 26 for place B, and both places presented four common species. The diversity indices and uniformity were H’ = 2.02 and E = 0.64 for place A and H’ = 2.20 and E = 0.65 for place B. It was observed that the largest richness of species and number of individuals were concentrated in the rainy season.