Taxonomic composition of hymenopteran parasitoid assemblages from agromyzid leaf-miners sampled in Central Argentina

This paper deals with the taxonomic composition of parasitoid assemblages r eared from agromyzid leaf-miners of 28 species collected in Cordoba, Centra l Argentina. The relative representation of each parasitic family was estim ated, taking into consideration their species richness and abundance. Sampl e size affected the total species richness in each complex, and also that o f Eulophidae and Pteromalidae, indicating that not only size but also taxon omic structure of parasitic assemblages are influenced by sampling effort. 3 superfamilies and 5 families of Hymenoptera Parasitica were represented, with Eulophidae (Chalcidoidea) specifically and numerically dominant both i n the total community of parasitoids and in the parasitic assemblages of in dividual hosts. Chrysonotomyia, Chrysocharis (Eulophidae), Halticoptera (Pt eromalidae) and Phaedrotoma (Braconidae) were the most relevant genera in t erms of number of species and number of specimens reared. The parasitoids o btained from samples taken in agroecosystems differed from the global spect rum of taxa mainly by showing a numerical dominance of Braconidae, despite a noticeable specific impoverishment of this family.