Rangel Luís F, Santos Maria J, Cech Gábor, Székely Csaba
Universidade do Porto, Faculdade de Ciências, Departamento de Zoologia-Antropologia, Rua do Campo Alegre, s/n. Edifício FC4, 4169-007 Porto, Portugal.
J Parasitol. 2009 Jun;95(3):561-9. doi: 10.1645/GE-1777.1.
The morphology of Zschokkella mugilis Sitjà-Bobadilla and Alvarez-Pellitero, 1993 (Myxosporea, Bivalvulida) in Nereis diversicolor O. F. Müller, 1776 is described for the first time. The molecular data show that the actinospore has 100% similarity to the myxospore of Z. mugilis. Fully mature actinospores are tri-radiate, the spore body has a small process, and the sporoplasm has 2 inner daughter cells. In the polychaete, the spores of the parasite develop in groups of 8 inside pansporocysts. The schizogony phase takes place in the intestinal epithelium, while gametogony and sporogony occur in the coelom of the polychaete. Observations indicate that mature spores are released only during the polychaete reproductive season. Infection was detected only in the winter and spring. In the Aveiro estuary (Portugal), the overall prevalence of infection of the polychaete was 0.5%.
首次描述了1993年发现的 Mugilis 海鲻单极虫（Zschokkella mugilis Sitjà-Bobadilla 和 Alvarez-Pellitero，粘孢子虫纲，双壳目）在1776年的杂色沙蚕（Nereis diversicolor O. F. Müller）体内的形态。分子数据显示，放射孢子与 Mugilis 海鲻单极虫的粘孢子具有100%的相似性。完全成熟的放射孢子呈三辐射状，孢子体有一个小突起，孢质内有2个内子细胞。在多毛纲动物中，寄生虫的孢子在泛孢子囊内成8个一组发育。裂殖生殖阶段发生在肠上皮，而配子生殖和孢子生殖发生在多毛纲动物的体腔中。观察表明，成熟孢子仅在多毛纲动物繁殖季节释放。仅在冬季和春季检测到感染。在葡萄牙阿威罗河口，多毛纲动物的总体感染率为0.5%。
