Occurrence of Atta robusta Borgmeier (Hymenoptera: Formicidae) in the north of Espírito Santo State, Brazil

Teixeira, M.B.; Schoereder, José H.; Louzada, Júlio

doi:10.1590/s1519-566x2004000200019

Cited by 9 publications

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“…On the other hand, several species of Atta are ecologically important as seed dispersers. For example, Atta robusta is ecologically important as a key seed disperser in the restingas (coastal sand-dune habitats) of the Brazilian states of Rio de Janeiro and Espírito Santo (Teixeira et al, 2004;Teixeira, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Several aspects of the ecology of A. robusta have been studied (Teixeira et al, 2004;Teixeira, 2007), but there have been no previous studies of the morphology of A. robusta sensorial organs. Thus, the current study used scanning electron microscopy (SEM) to investigate comparatively the microanatomy and distribution of antennal sensilla in two different populations of A. robusta for the first time.…”

Section: Introductionmentioning

confidence: 99%

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Morphological and morphometric studies of the antennal sensilla from two populations of Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae)

De¹,

Martins²,

Tm³

2013

Braz. J. Biol.

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The ant Atta robusta is endemic to the "restinga" ecosystems where it has an important role in the dynamics of seed dispersal. Despite its importance, A. robusta is considered a threatened species. In this study we analyzed the antennal sensory organs of two different populations of A. robusta (from the cities of São Mateus and Maricá in in Espírito Santo and Rio de Janeiro States, respectively) using a scanning electron microscope (SEM). SEM revealed different types of sensilla in the A. robusta antennae, i.e., curved and straight trichoid, basiconic, ampullacea and coeloconic, which were highly abundant found in the distal flagellomeres (F) compared with other antenna regions. There were differences in samples collected from two locations in terms of the sensilla number and length. The average numbers of straight and curved trichoid sensillae numbers were different in F9 and F8, respectively, while the average length of the curved trichoid sensilla was only different in F9. These variations in sensory organs between two populations of A. robusta may indicate an adaptation of this species to different environmental conditions. The number of straight trichoid sensilla was only significantly different in F9.Keywords: Attini, scanning electron microscopy, sensory organs.Estudo morfológico e morfométrico das sensilas antenais de Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae) ResumoAtta robusta é uma espécie de formiga endêmica, com papel importante na dinâmica dos ecossistemas de restinga. Apesar de sua importância como dispersora de sementes nesse tipo de ecossistema, essa espécie encontra-se ameçada de extinção. O presente trabalho lançou mão da microscopia eletrônica de varredura (MEV) para descrever as sensilas antenais de A. robusta e investigar diferenças entre sensilas antenais dessa espécie em indivíduos coletados em localidades diferentes, nos municípios de São Mateus (Estado do Espírito Santo) e Maricá (Estado do Rio de Janeiro). Diferentes tipos de sensilas como tricoideas retas e curvadas, basicônicas, ampuláceas e celocônicas foram encontradas nas antenas, sendo que todas são mais numerosas no flagelomero nove (F9) ou mais distal. Houve diferença em número e em comprimento das sensilas tricoideas retas e curvatas em F8 e F9 entre os indivíduos das duas localidades. Os números médios das sensilas tricoides retas e curvadas foram diferentes para os F9 e F8, respectivamente, enquanto que o comprimento médio das sensilas tricoides curvadas foi diferente para o F9. Essa variação na quantidade de sensilas antenais entre as populações é, possivelmente, uma plasticidade fenotípica, característica importante para a adaptação de espécies a variações ambientais. Esse trabalho representa um estudo preliminar na tentativa de se estudar a variação nos órgãos sensoriais entre diferentes populações de A. robusta.Palavras-chave: Attini, microscopia eletrônica de varredura, órgão sensorial.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Morphological and morphometric studies of the antennal sensilla from two populations of Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae)

De¹,

Martins²,

Tm³

2013

Braz. J. Biol.

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“…Because of the damage they cause to agriculture and the conspicuousness of their nests, they certainly belong to the most studied insect species of the Neotropics. Yet, despite the wealth of knowledge available on leaf-cutting ants, there is still a lack of basic information, such as on the geographic distribution of some species (Teixeira et al 2004). The species Atta cephalotes (L.) is known to have a wide and continuous distribution from Mexico to Bolivia (Kempf 1972).…”

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confidence: 99%

Occurrence of Atta cephalotes (L.) (Hymenoptera: Formicidae) in Alagoas, Northeastern Brazil

Corrêa¹,

Bieber²,

Wirth³

et al. 2005

Neotrop. Entomol.

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Neotropical Entomology 34(4): 695-698 (2005) Ocorrência de Atta cephalotes (L.) (Hymenoptera: Formicidae) em Alagoas RESUMO -Atta cephalotes (L.) apresenta ampla distribuição na região Neotropical. No Brasil, foi registrada na região Amazônica e nos estados do Maranhão, Pernambuco e sul da Bahia, todos pertencentes à Região Nordeste. Neste trabalho é apresentado o registro de A. cephalotes em 42 remanescentes de Floresta Atlântica nordestina em Alagoas e Pernambuco. Os resultados incluem novos registros de A. cephalotes em Alagoas, ampliando a distribuição da espécie no Nordeste. Além disso, mostram que a espécie é fortemente associada a remanescentes de floresta bem conservados, indicando alta sensitividade a perturbações. É sugerido que, no cenário fragmentado da Floresta Atlântica nordestina, A. cephalotes pode estar sendo substituída por A. sexdens que esteve presente em todas as áreas amostradas.

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“…Considering this and the fact that restinga represents a geologically recent environment, a low number of endemic species are expected (Freire 1990;Cerqueira 2000;Rocha 2000). However, recent studies recorded two endemic insect species (Dichotomius schiffleri, Coleoptera, and Atta robusta, Hymenoptera) which are very sensitive to habitat degradation (Teixeira et al 2004;Vieira et al 2008). They were added to the list of threatened animals in Brazil (IBAMA 2003) and although D. schiffleri has recently been recorded in other formations of the Atlantic Forest, the restinga continues to be its main habitat (Veira et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Changes in the dung beetle community in response to restinga forest degradation

2014

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Restinga (forest formations on sandy substrates on the Brazil Atlantic coast) have declined from covering approximately 80 % of the coastline and continue to do so due to anthropogenic activity. This study compares the abundance, richness and species composition of conserved (CR) and degraded (DR) resting forest. We used six locations on the coast of Pernambuco, Brazil where there were paired CR and DR sites and used baited pitfall traps to sample dung beetles in the dry and wet seasons. We captured 1,724 individuals, which belonged to 25 species and 10 genera; 1,030 individuals (15 species) were from CR and 694 individuals (17 species) from DR. No significant differences was observed in the patterns of species richness or abundance between CR and DR sites but non-metric multidimensional scaling and similarity analyses revealed differences in species composition between CR and DR sites. Additionally DR sites had a higher beta diversity than CR sites. We found only seven of the 25 species identified in this study in both areas, indicating that few species from the original ecosystem remain in degraded sites. In addition, the forest species that were recorded in Degraded sites, such as Canthon nigripenne and Dichotomius schiffleri, had low abundance when compared to conserved restinga. We suggest that parts of the CR become areas under legal protection, in order to maintain the biodiversity of the remaining areas of restinga.

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Occurrence of Atta robusta Borgmeier (Hymenoptera: Formicidae) in the north of Espírito Santo State, Brazil

Cited by 9 publications

References 0 publications

Morphological and morphometric studies of the antennal sensilla from two populations of Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae)

Morphological and morphometric studies of the antennal sensilla from two populations of Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae)

Occurrence of Atta cephalotes (L.) (Hymenoptera: Formicidae) in Alagoas, Northeastern Brazil

Changes in the dung beetle community in response to restinga forest degradation

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