Diversidade de Alticini (Newman, 1834) (Coleoptera, Chrysomelidae, Galerucinae) em fragmentos florestais no sudoeste do Paraná

Abstract

Due to its continental proportions Brazil has some regions whose entomofauna is still not well-known, such as Southwestern Paraná. In this region the great agricultural development resulted in the devastation of native areas, leaving few forest remnants representative of the original flora. Among the insects, Coleoptera stands out as the most diverse Order with more than 350 thousand known species and among them Chrysomelidae and Alticini has excelled in terms of abundance and wealth in several surveys, both in Brazil and abroad. Nonetheless, there is little information about this fauna in Southwestern Paraná. In order to know the diversity of Alticini, a faunal inventory with a Malaise trap was carried out in the municipalities of Planalto, Realeza and Santa Izabel do Oeste from October 2016 to March 2017. A total of 1,657 Alticini individuals belonging to 59 species of 20 genera, and for the majority of the species few individuals were collected. The most abundant species were Trichaltica sp.2, Margaridisa sp., Omophoita octoguttata and Epitrix sp.1, corresponding to 85.8% of Alticini collected. Planalto was the fragment that stood out both for abundance and richness, with 38 species collected. Santa Izabel do Oeste presented the lowest wealth, however it had the highest value of dominance due to the presence of Margaridisa sp. This same species contributed to the high similarity of the community structure between Realeza and Santa Izabel do Oeste. However, as regards species composition, the similarity was low, with only four species shared among all the fragments. This was the first inventory developed in Southwestern Paraná that contributed to the knowledge of the Alticini species in this region.