Navegando por Palavras-chave "Pentatomidae"

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    Comparative morphology of immature stages of four species of Chinavia (Hemiptera, Pentatomidae), with a key to the species of Rio Grande do Sul, Brazil
    (Pensoft Publ, 2013-01-01) Fuerstenau, Brenda Bianca Rodrigues Jesse; Schwertner, Cristiano Feldens [UNIFESP]; Grazia, Jocelia; Univ Fed Rio Grande do Sul; Universidade Federal de São Paulo (UNIFESP)
    Chinavia Orian (1965) is one of the most diverse genera of Pentatomidae, distributed in the Afrotropical, Neotropical and Nearctic Regions. Thirty-two species are recorded for Brazil, some of them having potential economic impact because they are found on crops and referred to as pests. the morphology of the five nymphal instars of C. armigera (Stal, 1859), C. aseada (Rolston, 1983), C. brasicola (Rolston, 1983) and C. runaspis (Dallas, 1851) are described here. Through a comparative study, identification keys were developed to allow an early identification of the 12 Chinavia species of Rio Grande do Sul.
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    Morfologia comparada da cabeça de Pentatomidae (Hemiptera: Heteroptera)
    (Universidade Federal de São Paulo, 2015-07-29) Barreiro, Maira dos Santos [UNIFESP]; Schwertner, Cristiano Feldens [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    The heteropteran head presents a high specialization level, making this group known for having, among other features, their piercing and sucking mouthparts in the anterior part of the head. Pentatomidae is the forth most diversified stink bug family. Its head is similar to those of all heteropterous, with variation on the size and shape of its structures, as the mandibular plates, clipeous, bucula and labium, with are very important to differentiate the Pentatomidae subfamilies and tribes. These variations gives this group numerous specializations and the head presents evidences of the evolutionary success of these organisms. The understanding of the head morphology and associated structures is extremely important to amplify the knowledge of this group, assists the taxonomy and provide essential information to investigate the phylogenetic relationships and the diversity of feeding habitats of Pentatomidae. This work aims to understand how the morphololgical variation ocurr in this tagma and to check if it is possible to recognize lineages through the head morphology and understand how the morphological variation is present in this tagma. To achieve this, the head morphology was compared among the Pentatomidae genus and was described for the recognized groups. Forty one important characters were raised and it was possible to elucidate some question about the head delimitation, the development of the structures and witch character describe them better. Based on the detailed characterization of the structures of the head it was possible to highlight the morphological variations of the head and understand which features are important in order to define and differentiate the Pentatomidae groups. Twenty-two lineages recognized by the head morphology are congruent with the subfamilies and tribes of the current Pentatomidae classification. Four more groups were recognized through groupping of genus that share the morphology of the head. Characteristics that define the groups were determined and all head structures were important for the group?s differentiation and definition at least in one character.
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    Rapid differentiation and asynchronous coevolution of male and female genitalia in stink bugs
    (Wiley, 2017) Genevcius, B. C. [UNIFESP]; Caetano, D. S.; Schwertner, C. F. [UNIFESP]
    Despite claims that genitalia are among the fastest evolving phenotypes, few studies have tested this trend in a quantitative and phylogenetic framework. In systems where male and female genitalia coevolve, there is a growing effort to explore qualitative patterns of evolution and their underlying mechanisms, but the temporal aspect remains overlooked. An intriguing question is how fast male and female genitalia may change in a coevolutionary scenario. Here, we apply a series of comparative phylogenetic analyses to reveal a scenario of correlated evolution and to investigate how fast male and female external, nonhomologous and functionally integrated genitalia change in a group of stink bugs. We report three findings: the female gonocoxite 8 and the male pygophore showed a clear pattern of correlated evolution, both genitalia were estimated to evolve much faster than nongenital traits, and rates of evolution of the male genitalia were twice as fast as the female genitalia. Our results corroborate the widely held view that male genitalia evolve fast and add to the scarce evidence for rapidly evolving female genitalia. Different rates of evolution exhibited by males and females suggest either distinct forms or strengths of selection, despite their tight functional integration and coevolution. The morphological characteristics of this coevolutionary trend are more consistent with a cooperative adjustment of the genitalia, suggesting a scenario of female choice, morphological accommodation, lock-and-key or some combination of the three.
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    Revisão do grupo concolor, gênero Odmalea Bergroth (Insecta:Hemiptera:Pentatomidae) utilizando abordagem integrativa através de análise morfométrica
    (Universidade Federal de São Paulo, 2022-01-27) Fonzaghi, Lucas Mazzucco [UNIFESP]; Schwertner, Cristiano Feldens [UNIFESP]; http://lattes.cnpq.br/0688968753503433; http://lattes.cnpq.br/9092880795204944
    A taxonomia integrativa propõe o uso de diferentes abordagens para se complementar à clássica descrição morfológica de espécies e a morfometria geométrica é um método quantitativo para avaliar a morfologia das estruturas, através da relação matemática entre landmarks que são posicionados ao longo da estrutura. O gênero Odmalea Bergroth (Hexapoda:Hemiptera:Pentatomidae), percevejo da região neotropical pertencente à tribo Procleticini e teve sua última revisão feita na década de 70. Estudos recentes com a tribo mostram que o gênero faz parte de um grupo parafilético, ou seja, suas espécies não compartilham de um ancestral exclusivo. Duas espécies do gênero foram agrupadas em um grupo denominado concolor por conta de características do pigóforo e são objeto deste estudo. A espécie Odmalea concolor possui uma ampla distribuição, o que gera dúvidas quanto à possibilidade da existência de novas espécies e a espécie Odmalea pallida é restrita ao sul da América do Sul, com poucos espécimes coletados. A morfometria comparada feita entre as duas espécies suporta a distinção entre elas nas estruturas pronoto, escutelo, genitália feminina e masculina, mas não indica nenhuma nova espécie. Os resultados da morfometria também permitem descrever dois morfotipos de genitália masculina para a espécie O. concolor. A revisão da taxonomia das espécies deste grupo apoia uma melhor compreensão da diversidade morfológica, incorporada na descrição de cada espécie.