A two-year study was carried out at Parque Estadual do Turvo, Municipality of Derrubadas, southern Brazil, aiming to evaluate the composition, abundance and species richness of Pentatomoidea. Samplings were conducted in the Springs of 2003 and 2004 (October), and Autumns of 2004 and 2005 (May), using beating tray method, along two trials of the park. Sampling effort (hours X collectors) totalled 153 hours. A total of 816 individuals of Pentatomoidea were collected, distributed in 56 species/morphospecies of seven families. It was found significantly less species in the Autumn 2005 than in the other periods. There was no significant difference, however, among Springs of 2003 and 2004, and Autumn of 2004, for the same parameter. Yucumã trail presented a significantly higher estimated richness than Garcia trail. Singletons and doubletons represented 44.6% of the recorded species. Aditionally, 20 other species/morphospecies of pentatomoids were obtained qualitatively by using, besides beating tray, ligth trap and visual inspections. The occurrence of species frequently associated to crops, dominant in the different sampling periods, suggests an influence of the adjacent crops on this conservation unity. New records of species for the State of Rio Grande do Sul are added.
Cydnidae; diversity; Pentatomidae; Scutelleridae; stink bugs
