Comparative morphology of clasping structures in predator stink bugs (Hemiptera: Pentatomidae: Asopinae): Insights into their function and evolution

Autor(es)

Roell, Talita ^{[1, 2]} ; Genevcius, Bruno C. ^[3] ; Campos, Luiz A. ^{[2, 4]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Museu Zool, Av Nazare 481, BR-04263000 Sao Paulo, SP - Brazil

^[2] Univ Fed Rio Grande do Sul, Inst Biociencias, Dept Zool, Av Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil

^[3] Univ Sao Paulo, Inst Biociencias, Dept Genet & Biol Evolut, Rua Matao 277, Sao Paulo, SP - Brazil

^[4] Roell, Talita, Univ Sao Paulo, Museu Zool, Av Nazare 481, BR-04263000 Sao Paulo, SP, Brazil.Roell, Talita, Univ Fed Rio Grande do Sul, Inst Biociencias, Dept Zool, Av Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ARTHROPOD STRUCTURE & DEVELOPMENT; v. 57, JUL 2020.
• Citações Web of Science: 3

Resumo

Parameres are male genital structures found in many insects which are often used as clasping devices to exert dominance in copula. The asopines have evolved a remarkable additional pair of similar structures, often denominated processes, which combines with the parameres in a tweezers-like system. Processes in similar positions have also been found in other subfamilies of Pentatomidae, but smaller and less developed. Using scanning electron microscopy, we document the among-species variability found in the clasping structures in asopines. We first revealed a vast diversity of ornamentations, such as sensilla and microsculpture. When present, these ornamentations are invariably found on both, the parameres and processes, and often on the corresponding female parts, the valvifers VIII, indicating a functional role of attachment and sensory perception in copula for the ornamentations. We also show that the processes are drastically different between the Asopinae and non-asopines. Therefore, we suggest the term ``pseudoclasper{''} for the Asopinae processes and ``superior process of dorsal rim{''} for the remaining examined taxa. The pseudoclaspers are directly connected to and attached in the same place as the parameres in asopines, while the superior processes of dorsal rim and parameres are completely disconnected in other pentatomids. These results indicate a non-homologous origin between pseudoclaspers and superior processes of dorsal rim in Pentatomidae. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 18/18184-4 - Evolução da complexidade genital: uma abordagem evo-devo utilizando pentatomídeos como modelos
• Beneficiário: Bruno Celso Feltrin Genevcius
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/23527-8 - Filogenia, revisão e atualização dos dados de distribuição geográfica de Stiretrus Laporte, 1833, Oplomus Spinola, 1837 e Perillus Stal 1862, e a construção de um banco de dados de Asopinae (Hemiptera: Heteroptera: Pentatomidae)
• Beneficiário: Talita Roell
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado