Navegando por Assunto "Besouro"

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Acesso aberto (Open Access)
A comunidade de Curculionidae (Coleoptera) de inflorescências da palmeira Euterpe longebracteata Barb. Rodr. em uma área de transição Amazônia-Cerrado, Mato Grosso, Brasil
(Universidade Federal do Pará, 2009-10-30) GUIMARÃES, José Raimundo Rocha; VALENTE, Roberta de Melo; http://lattes.cnpq.br/9638288458835324
The research was done with the community Curculionidae inflorescences of the palm Euterpe longebracteata in riparian areas (PPAs), degraded and preserved, in Tanguro Farm, Mato Grosso, Brazil, aiming to provide inputs on policy management and recovery areas. The weevils represented the most important component of the fauna associated with the inflorescences of the E. longebracteata, with 23 species richness, frequency of 97% in the samples and abundance of 10,000 (or 90% of total abundance). Species Phyllotrox sp. 18, Phyllotrox sp. 19, Erirhininae gen.n.Asp.1 , Erirhininae gen.n.Esp.1 and Bondariella sp. 3 accounted for more than 98% of abundance, were found to be dominant in the inflorescences of E. longebracteata and therefore specifically related to the palm and can act as effective pollinators species of the E. longebracteata in the area. Despite the differences between PPAs preserved and degraded populations of E. longebracteata and species composition of Curculionidae were not correlated with the level of degradation of PPAs. The wealth of Curculionidae also not correlated with canopy cover, distance to the edge of the sample, size of inflorescences and number of flowers per inflorescence of E. longebracteata. The influence of collection period on the abundance of most dominant species was regarded as indicative of population dynamics and ecological succession. While Phyllotrox sp. 19, seems to present a pattern of aggregate distribution. Species Phyllotrox sp.18 and Erirhininae gen. No The sp. 1 were considered as having plenty more sensitive to degradation of PPAs. The palm E. longebracteata has potential use in the recovery of degraded areas of Tanguro farm because their populations and species of Curculionidae likely pollinators showed tolerance to the observed degradation.
Acesso aberto (Open Access)
O gênero microstrates lacordaire (Curculionidae : Baridinae): sistemática, filogenia e evolução da associação com palmeiras hospedeiras
(Universidade Federal do Pará, 1997-03-11) ROCHA, Roberta Valente da; GORAYEB, Inocêncio de Souza; http://lattes.cnpq.br/2391620537048479
A revision and phylogenetic analysis of the genus Microstrates is presented based on new characters discovered in the course of this study, and on others previously know from the literature. Eleven species are recognized, vvhich can be identified by the key presented. Two new species are described: Microstrates almiri sp. n., Caxiuanã and Belém, Pará; and M. pinrima sp. n., Monte Alegre, Pará. Microstrates bipunctatus Hustache, 1951 is considered a synonym of M. cocois Bondar, 1941. The phylogenetic analysis of the species Microstrates resulted in a hypotesis that may be expressed parenthetically as follows; ((M. cocoscampestris (M. abbreviatus (M. rufus, M. hatschbachi))) ((M. M. piririma) (M. cocais (M. cearanus, M. ypsilon) (M. cucullus, M. bondan)))). The first records of the palm hosts of M. almin sp. n., M. pirinma sp. n. and M rufus Hustache are presented. The species M. almin sp. n. and M. pirinma sp. n., collected in Pará state, represent the first record of Microstrates in the Amazonian Region. Ali species are redescribed and their most important structures for the identification are illustrated. The collection of Weevils in differents species of palms in Pará and Amazonas states confirms the hypothesis of a exclusive association of Microstrates with palms of the genera Syagrus, Butia and Cocos, and also that each species of Syagrus and Butia host only one species of Micro strates. The cladogram mapping and optimization of host palm associations of Microstrates supports the following hypothesis: association with the genus Syagrus is plesiomorphic, with Butia is apomorphic, and with the coconut (Cocos nucifera) is explained by colonization events.
Acesso aberto (Open Access)
A new species of Scymnobius Casey (Coleoptera, Coccinellidae, Scymnini) from Pernambuco, Brazil
(Universidade Federal do Pará, 2014-12) GIORGI, José Adriano; GONZÁLEZ, Guillermo
A new species of Scymnobius Casey (Coleoptera, Coccinellidae, Scymnini) from Pernambuco, Brazil. Scymnobius pernambucensis sp. nov. from Pernambuco, Brazil, is described and illustrated. This is the third species of this genus recorded from Brazil.