Borboletas (Lepidoptera: Hesperioidea e papilionoidea) de val de serra, região central do rio grande do sul, Brasil

The butterfly fauna of the Atlantic Forest Biome is reasonably well-known up to the southern limit of its distribution. However, there are knowledge gaps nearby the central region of Rio Grande do Sul State, whose forest areas are considered priorities for biological conservation. This study investigated the butterfly assemblage of a riparian fragment in an ecotone area between Mixed Ombrophilous Forest and Seasonal Decidous Forest, in Itaara municipality. From September 2005 to September 2006, after 105 net-hours through active search sampling, 877 butterflies were registered representing 104 species. Three more species were registered posteriorly, increasing total richness to 107. The most abundant species were the Nymphalidae Hermeuptychia hermes (Fabricius, 1775), Yphthimoides celmis (Godart, [1824]), Agraulis vanillae maculosa (Stichel, [1908]), Tegosa claudina (Eschscholtz, 1821) and Vanessa braziliensis (Moore, 1883). One new record for the State and four new ones for the central region were registered besides the southern endemic Papilionidae Euryades corethrus (Boisduval, 1836) and the Lycaenidae Arcas ducalis (Westwood, 1852), considered indicator of Atlantic forest preserved areas. Due to the representativeness of the registered fauna, it is suggested the increase of conservation efforts in the area and stimulation of new ecological studies with the local biodiversity

Butterflies (Lepidoptera: Papilionoidea and Hesperioidea) from two forest fragments in northern Rio Grande do Sul, Brazil

Aiming to contribute to the knowledge concerning diversity of the butterflies in the Atlantic Rainforest ofthe state of Rio Grande do Sul, a systematic survey was carried out in the city of Frederico Westphalen from November2006 to June 2007, in two sampling localities. The total sampling efforts was 80 h, in which 1.785 samples wererecorded, distributed in 161 species. From the latter, 51.57 % (83) belongs to the Nymphalidae family, Hesperiidae20.49 % (33), Pieridae 8.69 % (14), Riodinidae 6.83 % (11), Papilionidae 6.21 % (10), Lycaenidae 6.21 % (10).Regarding the sampled species, 79.50 % (128) were recorded at both studied sites