Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/4592
Title: Morphology of the male reproductive system and spermatozoa in Centris Fabricius, 1804 (Hymenoptera: Apidae, Centridini).
Authors: Gomes, Luiz Fernando
Badke, Juliana Pires
Zama, Uyrá dos Santos
Dolder, Heidi
Lino Neto, José
Keywords: Bees
Ultrastructure
Seminal vesicle
Testes
Issue Date: 2012
Citation: GOMES, L. F. et al. Morphology of the male reproductive system and spermatozoa in Centris Fabricius, 1804 (Hymenoptera: Apidae, Centridini). Micron, v. 43, p. 695-704, 2012. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0968432812000145>. Acesso em: 08 nov. 2014.
Abstract: The genera Centris and Epicharis constitute the Centridini and are widely distributed in the Neotropical region. Centris is also found in the southern portion of the Neartic region, although both genera are more abundant in the humid tropical regions. To describe the structure of the male reproductive system and spermatozoa, light and transmission electron microscopy were used. The male reproductive system of Centris sp. is formed by a pair of testes, a pair of deferent ducts, a pair of seminal vesicles, a pair of accessory glands and an ejaculatory duct connected to the external genitalia, the aedeagus. In this species, testes and the pre-vesicular deferens ducts as well as the seminal vesicles are encapsulated in a single conjunctive capsule, the scrotal membrane. Each testis consists of four testicular follicles, made up of cysts with up to 64 germinative cells. Histologically, the seminal vesicles are formed by a simple cylindrical epithelium, basal membrane and muscular tunic. The spermatozoa of Centris analis, C. fuscata, C. tarsata and Centris sp. are morphologically similar. They have two easily distinguishable regions: the head and flagellum. The head is formed by the two-layer acrosome, the linear nucleus and the flagellum, the centriole adjunct, the axoneme of pattern 9 + 9 + 2 microtubules, two asymmetric mitochondrial derivatives and two accessory bodies. These Centris species share various morphological characteristics of the male reproductive system and spermatozoa with the other bees previously described, indicating that several characteristics are synapomorphic for the family Apidae. Studies on the morphology of the male reproductive system and spermatozoa in Hymenoptera have demonstrated the diversity of the information provided by these reproductive structures, which can be used in taxonomy studies and the phylogeny of this important group of insects.
URI: http://www.repositorio.ufop.br/handle/123456789/4592
metadata.dc.identifier.doi: https://doi.org/10.1016/j.micron.2012.01.013
ISSN: 0968-4328
metadata.dc.rights.license: O periódico Micron concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3550930397803.
Appears in Collections:DECBI - Artigos publicados em periódicos

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