Espécies de Eiphosoma Cresson, 1865 (Hymenoptera, Ichneumonidae, Cremastinae) em áreas de mata e cerrado da bacia hidrográfica do rio Mogi-Guaçu

Abstract

This work is a study of Eiphosoma s species. The sampling was done in areas of seasonal semidecidual forest and savanna in Mogi-Guaçu River Basin, aiming to increase knowledge about the taxonomy, geographical distribution, population structure, and the influence of seasonality in the occurrence of the species of this genre. Malaise traps were installed in ten fragments along the entire basin. We studied 217 specimens of Eiphosoma distributed in 25 species, among them we found five new records for Brazil - E. strontorium Gauld, 2000; E. kelpanum Gauld, 2000; E. macrum (Enderlein, 1921), E. henorum Gauld, 2000; E. cerfen Gauld, 2000, and also 11 possible new species. The most abundant species was E. macrum with 52% of total individuals, followed by E. laphygmae (13.8%) and Eiphosoma sp. n. 2 (14.2%) which have strong dominance in the places they occurred. In Minas Gerais the two most abundant and richest areas were Jacutinga with 31.8%, and Andradas with 30,6 % of total individuals, richness index was similar at both points, which showed 55.5% of all species (S=5).The municipality of Jacutinga also had the highest diversity index (H =1.21), but the highest equitability index was observed in Damázio district of Bom Repouso (J =0.91). In São Paulo, the fragment with highest abundance was the riparian area in the city of Luiz Antônio (E.E. Jataí) with 40.3% of total individuals. The highest richness index was observed in the fragment of Pontal with 65% of species collected throughout the state (S=13).The areas with highest diversity indexes were the legal reserve area of Usina Bela Vista in Pontal (H =1.73) and a fragment of cerrado on the Luiz Antônio (E.E. Jataí) (H =1.83), which also demonstrated the highest equitability index (J =0.88). We verified no significant correlation between total abundance and seasonality (Fr= 10,3 ; p = 0.32). Amongst main results we point out the description of eleven new species, an increase of information about the distribution of genus with the record of five species in Brazil and the better knowledge of patterns of species richness, diversity and equitability.