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Doctoral Thesis
DOI
https://doi.org/10.11606/T.38.2018.tde-08112018-151150
Document
Author
Full name
Bruno Celso Genevcius
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2018
Supervisor
Committee
Schwertner, Cristiano Feldens (President)
Barros, Fábio Cury de
Correa, Alberto Soares
Simon, Monique Nouailhetas
Takiya, Daniela Maeda
Title in Portuguese
Padrões e processos de evolução genital em Pentatomidae: Pentatominae (Insecta, Hemiptera)
Keywords in Portuguese
DNA
Hemiptera
integração fenotípica
modularidade
seleção sexual
Abstract in Portuguese
Genitálias de machos tendem a apresentar maior elaboração e taxas de evolução mais altas que as de fêmeas, fenômeno cujos mecanismos associados ainda são pouco compreendidos. Nesta tese buscamos explorar tais mecanismos através da compreensão sobre os papéis funcionais e do desenvolvimento por trás da diversificação genital em Pentatomidae. No primeiro capítulo, investigamos o funcionamento das peças genitais externas em machos e fêmeas de espécies de diferentes linhagens, identificando grupos de estruturas que funcionam de forma mais integradas entre si. Mostramos que existem marcas funcionais únicas a algumas linhagens, mas por outro lado algumas características são conservadas e se repetem em todas as espécies. No segundo capítulo, inferimos uma filogenia para Pentatomidae usando dados moleculares e morfológicos, com enfoque na subfamília mais diversa e confusa taxonomicamente, Pentatominae. Identificamos diversas linhagens propostas na literatura com grande suporte, corroboramos a monofilia de Pentatomidae e a polifilia de Pentatominae. No terceiro capítulo, testamos a hipótese de que diferentes componentes genitais em fêmeas possuem maior restrição evolutiva por serem mais integradas durante o desenvolvimento, em comparação aos machos. Corroboramos esta hipótese, e sugerimos que as genitálias dos machos são evolutivamente moldadas pela forma como funcionam na cópula, enquanto a diversificação nas fêmeas é restringida por sua origem ontogenética.
Title in English
Patterns and Processes of Genital Evolution in Pentatomidae: Pentatominae (Insecta, Hemiptera)
Keywords in English
DNA
Hemiptera
modularity
phenotypic integration
sexual selection
Abstract in English
Male genitalia tend to show greater elaboration and evolve faster in relation to females, a phenomenon whose underlying mechanisms are still poorly understood. In this thesis, we explore these mechanisms seeking to understand the functional and developmental roles in the diversification of genitalia in Pentatomidae. In the first chapter, we investigated the function of the external genital parts in males and females from different lineages, with the goal of identifying structures that work in a more integrated fashion. We showed that each species have unique functional signals, but some characteristics are more conserved and invariable. In the second chapter, we inferred a phylogeny to the Pentatomidae using morphological and molecular data, focusing on the most diverse and taxonomically confusing subfamily, Pentatominae. We recognized several lineages proposed on the literature with strong support, corroborate the monophyly of Pentatomidae and the paraphyly of Pentatominae. In the third chapter, we test the hypothesis that different genital components in females are more evolutionarily constrained for being more integrated during the development, comparing to males. We corroborated this hypothesis and suggest that male genitalia are evolutionarily shaped by their functional roles in copula, while the diversification in female genitalia is more constrained due to its ontogenetic origin.
 
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Release Date
2020-11-12
Publishing Date
2018-12-07
 
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