ABSTRACT
This study presents the diversity and distribution of myriapod species associated with different habitats in a seasonally flooded forest composed predominantly of Vochysia divergens Pohl. (Vochysiaceae) in the Brazilian Pantanal. We evaluated species richness distribution across habitats and over different seasonal periods, and also identified possible survival strategies employed during periodic flooding that occur within this forest. A total of 1505myriapods were sampled, representing four classes and 15 species. Diplopoda and Chilopoda were the most abundant and rich taxa. Pauropoda and Symphyla were represented by only one species each. Species richness was distinctly distributed across habitats evaluated in this forest, as well as over the different seasonal periods. Survival strategies observed in Diplopoda and Chilopoda were primarily associated with vertical migration ranging from the edaphic environment to tree trunks and canopies, and horizontal migration associated with water level before and during the flood period. Species richness was considered low; however, the survival strategies, especially vertical and horizontal migration, demonstrate the adaptation of these species to the seasonal floods of this ecosystem.
ABSTRACT
This study presents the diversity and distribution of myriapod species associated with different habitats in a seasonally flooded forest composed predominantly of Vochysia divergens Pohl. (Vochysiaceae) in the Brazilian Pantanal. We evaluated species richness distribution across habitats and over different seasonal periods, and also identified possible survival strategies employed during periodic flooding that occur within this forest. A total of 1505myriapods were sampled, representing four classes and 15 species. Diplopoda and Chilopoda were the most abundant and rich taxa. Pauropoda and Symphyla were represented by only one species each. Species richness was distinctly distributed across habitats evaluated in this forest, as well as over the different seasonal periods. Survival strategies observed in Diplopoda and Chilopoda were primarily associated with vertical migration ranging from the edaphic environment to tree trunks and canopies, and horizontal migration associated with water level before and during the flood period. Species richness was considered low; however, the survival strategies, especially vertical and horizontal migration, demonstrate the adaptation of these species to the seasonal floods of this ecosystem.
ABSTRACT
The elytro-tergal stridulatory organ that occurs in Bondarius Rosado-Neto, 2006 a genus of the tribe Sternechini (Curculionidae, Molytinae) is described and illustrated. The stridulatory apparatus is present both in male and female and is composed by the file, a narrow elevated carina which is transversely multistriate located at the apical third of the internal side near the suture of left elytron, and by the plectrum, a narrow striate area located transversely at the dorso-apical margin of the abdominal tergite 7.
O aparelho estridulatório do tipo élitro-tergal que ocorre em Bondarius Rosado-Neto, 2006 um gênero da tribo Sternechini (Curculionidae, Molytinae) é descrito e ilustrado. O aparelho estridulatório presente em machos e fêmeas é composto pelo file, uma carena multiestriada, estreita e elevada, localizada transversalmente no terço apical do élitro esquerdo, na margem interna, próximo a sutura elitral, e pelo plectrum, uma área estreita e estriada localizada transversalmente na margem dorso-apical do tergito abdominal 7.
ABSTRACT
Descrição da larva e pupa da broca do mamoeiro Pseudopiazurus papayanus (Marshall) (Coleoptera, Curculionidae, Piazurini). Larvas, pupas e adultos de Pseudopiazurus papayanus (Marshall, 1922) estão associadas com Carica papaya Linnaeus, 1753 (Caricaceae). A larva de último instar e a pupa são descritas e ilustradas. O dimorfismo sexual observado no ultimo segmento abdominal das pupas, também é ilustrado.
Subject(s)
Animals , Coleoptera/anatomy & histology , Coleoptera/classification , Coleoptera/growth & development , Carica , Larva/growth & development , Pupa/growth & developmentABSTRACT
No início de 2001, em pomar comercial de abacateiro (Persea americana Mill.) situado no município de São Benedito, estado do Ceará, foi observada intensa infestação de larvas de Heilipus rufipes Perty, broqueando a base das árvores. O ataque se concentrava na região do colo, havendo também galerias na bifurcação de ramos mais baixos da copa e nas raízes mais superficiais. Nas árvores severamente atacadas, as raízes mais grossas, próximas à superfície do solo, exibiam galerias e extensas áreas com ausência de casca. Em cerca de 30 por cento das árvores, os sintomas evoluíram para seca de ramos com posterior morte da planta. Inspeções na área indicaram infestação em mais de 90 por cento das árvores, em cujos troncos podiam ser observados de cinco a doze adultos do inseto, algumas vezes escondidos debaixo da casca. Não é conhecida a ocorrência de formas imaturas de H. rufipes causando danos em abacateiro ou mesmo em outras plantas cultivadas; assim, esta constatação torna o gênero Heilipus relativamente mais importante como praga de frutíferas, especialmente do abacateiro.
In the beginning of 2001, a high infestation of Heilipus rufipes Perty larvae boring avocado trees at ground level was observed in a commercial orchard in São Benedito, State of Ceará, Brazil. The damage observed was the presence of tunnels at the trunk basal part as well on the lower branches and superficial roots. Several attacked trees showed the most superficial roots with extensive barkless areas. In about 30 percent of the trees, the symptoms evolved to branch drought and death of the plant. More than 90 percent of the trees examined presented five to twelve adult insects, sometimes hidden under the bark. That is the first time of detection of immature stages of H. rufipes causing damage to avocado trees; even in other plant species, there is no report of such incidence. This report makes the Heilipus genus more important as pest of fruit plants, mainly avocado.
