ABSTRACT
Taxonomic data on Coreidae have been fragmented over time and need to be revised. Likewise, data related to the development of germ cells and the features of the male reproductive system, including sperm, will contribute to understanding the biological mechanisms of reproduction and the systematics of its representatives. Aiming to provide these data, we describe the morphology of the male reproductive system and spermatozoa of Leptoglossus zonatus using light and transmission electron microscopies, respectively. Each of the two testes is surrounded by a bright red-pigmented sheath and formed by seven follicles arranged side by side. The two vasa deferentia are filled with individualized sperm, especially in their final portion, which is dilated and curved. After dilation, the vasa deferentia receive the ducts of the accessory glands of mesodermal origin. The other unpaired accessory gland is of ectodermal origin and opens into the ejaculatory duct. Both glandular types are densely coiled and have lumens filled with secreted material. Testicular follicles contain cysts with germ cells at different stages of spermatogenesis, indicating continuous production of gametes throughout adult life. Mature sperm measure around 310 µm long, with a nucleus of 36 µm and a flagellum formed only by an axoneme of 9 + 9 + 2 microtubules and two symmetrical mitochondrial derivatives. Like the sperm of other Heteroptera, the acrosome has a single structure (without perforatorium), there are no accessory bodies in the flagella, and the mitochondrial derivatives are connected to the axonemes, supporting the synapomorphic condition of these characteristics for this suborder of bedbugs. RESEARCH HIGHLIGHTS: The Leptoglossus zonatus sperm are slender and long, about 310 µm in length, and a nucleus 36 µm long. Spermatogenesis occurs throughout adult life and equally in the seven testicular follicles. The centriole adjunct in L. zonatus sperm does not give rise to accessory bodies. The ectodermal gland produces a filamentous secretion, whereas in the ectodermal sac, the secretion is globular.
Subject(s)
Heteroptera , Animals , Male , Heteroptera/anatomy & histology , Semen , Spermatozoa , Genitalia, Male , AcrosomeABSTRACT
Os agravos externos constituem a segunda causa de óbitona população do Brasil e a prevalência de alcoolemia positiva entre as vítimas de diferentes causas externas é alta. O objetivo deste estudo é analisar a incidência dos agravos externos por projétil de arma de fogo,arma branca e acidente de transporte, no Pronto Socorro do Hospital Regional de Ceilândia durante um período de vigência da Lei Seca. Método: Foi realizado um estudo ecológico de série temporal, por meio da coleta e análise em prontuários médicos e guias de atendimento deemergência do setor de Cirurgia Geral preenchidos no período de 21 de janeiro de 2002 a 21 de abril de 2002, e período equivalente nos anos de 2001 e 2003.Resultados: Foram analisadas 27.970 guias de atendimento, dentre as quais 1.904 referiam-se a agravos de interesse, sendo 1.427 procedentes da Ceilândia. A freqüência foi maior no sexo masculino e na faixa etáriade 20 a 39 anos. Conclusão: Houve redução de 63 por cento no número de agravos por arma branca e de 32 por cento no de acidentes automobilísticos no horário de vigência da Lei Seca de 2002 quando comparado com 2001.Palavras-chave: Lei seca, Álcool, Agravos Externos, Arma de Fogo, Arma Branca e Acidente de Transporte.