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Volume 2010, Article ID 428673, 10 pages
Research Article

Comparative Study of Spermatogenesis and Nucleolar Behavior in Testicular Lobes of Euschistus heros (Heteroptera: Pentatomidae)

Laboratório de Citogenética e Molecular de Insetos (LACIMI), Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista (UNESP), Rua Cristóvão Colombo, 2265, Jardim Nazareth, CEP: 15054-000 São José do Rio Preto, SP, Brazil

Received 23 March 2010; Accepted 17 June 2010

Academic Editor: Coby Schal

Copyright © 2010 Hederson Vinicius de Souza and Mary Massumi Itoyama. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In some testicular lobes of the Pentatomidae there may be occurrence of atypical spermatogenesis or polymegaly, leading to the production of nonfertile sperm. The comparative analysis of spermatogenesis and nucleolar behavior in testicular lobes of Euschistus heros showed cells with polymegaly in lobes 4 and 6. Generally, when these lobes are present in the same individual, there is also the formation of atypical cells in the flanking lobe. Such characteristic was not seen in E. heros. However, differences regarding the concentration of heteropyknotic chromatin and silver-positive bodies in this lobe deserve attention. This study explored the literature and demonstrated the prevalence of some lobes in the formation of differentiated cells. It was also found in the literature that there is an association of the chromocenter with the nucleolus in several species of Pentatomidae, but in E. heros this association does not appear to occur.