ABSTRACT. Arthropods associated with the canopy of the palm Attalea phalerata Mart. (Arecaceae), in the Pantanal of Poconé, Mato Grosso, Brazil. Six individuals of the palm A. phalerata, in Poconé floodplains of Mato Grosso, were sprayed with a synthetic pyrethroid (0.25% concentration) in order to study the biomass, diversity, and richness of the canopy arthropods. A total of 17,188 (238.7±80.6 ind./m²) arthropods belonging to 22 Orders, was collected in a 72 m² funnel area. Two hours after spraying, 58.9% of the total number fell into the funnels, 37.6% was obtained by shaking the trees, and finally, 3.5% after cutting and washing all the palm leaves. The Coleoptera (27.4%), Hymenoptera-Formicidae (19.0%), Collembola (13.6%), Psocoptera (10.7%), Diptera (9.0%) and Araneae (6.4%) were the predominant. The total biomass was 15.1 g dry weight (0.4mg/m²; 0.13+0.04/tree). A total of 4,715 beetles representing 48 families and 326 morphospecies were obtained. Tenebrionidae (22.9%), Curculionidae (22.0%), Carabidae (10.9%) and Staphylinidae (7.9%) were the most abundant, while Curculionidae (44 spp.), Staphylinidae (40 spp.) and Chrysomelidae (34 spp.) presented the largest number of morphospecies. Herbivores (37.5%) were the dominant in the trophic guilds of adult Coleoptera, followed by predators (35.4%), fungivores (14.6%), and saprophages (12.5%). Although most arthropod Orders were represented in all the palms sampled, analysis of variance showed no significant differences in their composition, however there was a significant difference in their frequency of occurrence.

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Este estudo apresenta registro da associação entre três espécies de Cerambycidae e Vochysia divergens Pohl (Vochysiaceae), espécie vegetal típica da região norte do Pantanal de Mato Grosso, que além de formar adensamentos monodominantes é considerada uma invasora de campos e pastagens nativas nesta região. Neste estudo, galhos e troncos desta espécie vegetal foram coletados ao longo de um ano (julho/1999 a junho/2000) e monitorados em laboratório para avaliação da densidade e período de emergência dos cerambicídeos. Como resultado, foram amostrados 277 indivíduos, representando três espécies de Cerambycidae, Psapharochrus bivittis (White), Luscosmodicum beaveari Martins e Neoeme bouvieri Gounelle. Além do registro da associação, observou-se que o pico de emergência dos Cerambycidae coincide com o início do período de enchente e cheia na região norte do Pantanal, evidenciando o sincronismo entre o desenvolvimento biológico destas espécies e o ciclo hidrológico desta região.  Cerambycidae (Insecta, Coleoptera) Associated with Vochysia divergens Pohl (Vochysiaceae) in the Northern Region of the Pantanal of Mato Grosso, BrazilAbstract. This study aims the registration of the association between Cerambycidae and Vochysia divergens Pohl (Vochysiaceae), typical plant species of the northern region of the Pantanal of Mato Grosso that besides forming monodominant stands and is considered a weed of fields and pastures in this region. In this study, branches and trunks of this specie were collected over one year (July/1999 - June/2000) and lab monitored for density and emergency time evaluation of Cerambycidae. As results 277 individuals were sampled, representing three species of Cerambycidae, Psapharochrus bivittis (White), Luscosmodicum beaveari Martins and Neoeme bouvieri Gounelle. In addition to registration of the association, it was noted that the emergence peak of Cerambycidae coincides with the beginning of flood and high water period in northern Pantanal, showing the synchronization between the biological development of this species and the hydrological cycle in this region

As palmeiras correspondem a um importante elemento nos ecossistemas tropicais, servindo como fonte alimentar e habitat para uma grande variedade de organismos invertebrados e vertebrados. Considerando o papel destas plantas como hospedeiras de diferentes espécies este estudo objetivou avaliar de maneira descritiva a composição, distribuição em guildas tróficas e a biomassa da comunidade de Coleoptera associada às copas de Attalea phalerata Mart. (Arecaceae) no Pantanal de Poconé, Mato Grosso. Ao todo foram amostrados seis indivíduos desta palmeira em fevereiro 2001, empregando-se a metodologia de termonebulização de copas. Obtiveram-se 7.670 indivíduos (77,5 ind./m²), sendo 5.044 adultos (65,7%; 50,9 ind./m²) e 2.626 larvas (34,3%; 26,5 ind./m²). Os adultos foram distribuídos em 43 famílias e 467 morfoespécies. As famílias mais representativas foram Endomychidae, Nitidulidae, Tenebrionidae, Staphylinidae e Curculionidae, correspondendo a 66,9% do total coletado. Dentre as guildas tróficas, saprófagos, fungívoros e herbívoros predominaram sobre predadores. A maior riqueza de espécies foi observada em Staphylinidae, Curculionidae, Tenebrionidae e Chrysomelidae. A maior biomassa foi registrada para Scarabaeidae e Tenebrionidae, seguidos por Nitidulidae e Curculionidae. Esses resultados indicam que a copa de A. phalerata é habitat para uma grande diversidade de Coleoptera, bem como local de reprodução, fato evidenciado pelo elevado número de larvas amostradas neste estudo. Coleoptera (Arthropoda, Insecta) Associated with the Canopies of Attalea phalerata Mart. (Arecaceae) in the Pantanal of Poconé, Mato Grosso, Brazil Abstract. The palm trees correspond to an important element in tropical ecosystems, serving as food source and habitat for a wide variety of invertebrates and vertebrates. Considering the role of these plants as hosts of different species, this study evaluated descriptively the composition, trophic guilds and biomass of the community of Coleoptera associated with canopies Attalea phalerata Mart. (Arecaceae) in the Pantanal of Poconé, Mato Grosso. Six palm trees were sampled during the high water season of the Pantanal of Mato Grosso (February 2001), by canopy fogging. A total of 7,670 specimens were collected (77.5 ind./m²), 5,044 adults (65.7%; 50.9 ind./m²) and 2,626 larvae (34.3%; 26.5 ind./m²). Adults (65.7%) represented 43 families and 467 morphospecies. The dominant families were Endomychidae, Nitidulidae, Tenebrionidae, Staphylinidae and Curculionidae, representing 66.9% of the total catch. Saprophages, fungivores and herbivores prevailed over predators. Highest richness of species was found for Staphylinidae, Curculionidae, Tenebrionidae and Chrysomelidae. Highest biomass was found in Scarabaeidae and Tenebrionidae followed by Nitidulidae and Curculionidae. These results indicate that the canopy of A. phalerata is habitat for a wide variety of Coleoptera, as well a reproduction site, as evidenced by the high number of larvae sampled in this study.