Programa de Pós-graduação em Biologia Animal, Universidade de Brasília, DF, Brazil.
Micron. 2010 Oct;41(7):853-60. doi: 10.1016/j.micron.2010.04.015. Epub 2010 May 7.
The spermatozoa of Chrysomya megacephala are similar to those described for other Brachycera. In this species, the spermatozoa are long and thin, measuring about 590microm in length, of which the head region measures approximately 60microm. The head includes a monolayered acrosome with electron-lucid material, and the shape of the nucleus, in cross-sections, varies from circular to oval with completely condensed chromatin. The centriole was observed in the zone of flagellar implantation, below the "peg" region. In the region of overlap, the followings structures are observed: nucleus, centriolar adjunct, mitochondrial derivatives and axoneme. The two mitochondrial derivatives are of different lengths but similar diameter. The axoneme is of a conventional insectan type with a 9+9+2 microtubular arrangement, with accessory tubules flanked by the electron-dense intertubular material. The male internal reproductive tract consists of testis, vas deferens, seminal vesicle, accessory glands and ejaculatory duct.
红头丽蝇的精子与其他双翅目昆虫的精子相似。在该物种中，精子细长，长约 590 微米，其中头部区域约 60 微米。头部包括具有电子透明物质的单层顶体，核的形状在横切面上从圆形到椭圆形不等，染色质完全浓缩。中心粒在鞭毛植入区下方的“钉”区观察到。在重叠区观察到以下结构：核、中心粒附属物、线粒体衍生物和轴丝。两个线粒体衍生物长度不同，但直径相似。轴丝是一种具有典型的昆虫型 9+9+2 微管排列，附属小管由电子致密的间质材料包围。雄性内部生殖管包括睾丸、输精管、精囊、附属腺和射精管。
