Køie M
Marine Biological Laboratory, University of Copenhagen, Helsingør, Denmark.
J Parasitol. 2000 Aug;86(4):871-2. doi: 10.1645/0022-3395(2000)086[0871:FROAAM]2.0.CO;2.
The marine polychaete Nereis (Hediste) diversicolor (Annelida) from shallow water in the Oresund, Denmark, was found to be infected with an actinosporean stage of a myxozoan parasite. The body length of the pyriform actinospore is 12-16 microm and its maximum width is 10-12 microm. The spore is triangular in apical view, with the 3 spherical polar capsules distally. The spore is without caudal processes. Eight spores develop in each pansporocyst. Free spores and pansporocysts were found in the musculature and parapodia but not in the intestine. The myxosporean stage in fish is unknown. This is the first record of an actinosporean stage in a marine polychaete, but because marine oligochaetes are rare, compared with polychaetes, the latter are believed to play an important role as invertebrate (alternate) hosts in marine myxozoan life cycles.
在丹麦厄勒海峡浅水区发现的海洋多毛纲动物杂色沙蚕（Hediste）diversicolor（环节动物门）感染了一种粘孢子虫寄生虫的放射孢子虫阶段。梨形放射孢子的体长为12 - 16微米，最大宽度为10 - 12微米。孢子在顶面观呈三角形，3个球形极囊位于远端。孢子无尾突。每个孢子母细胞中有8个孢子发育。在肌肉组织和疣足中发现了游离孢子和孢子母细胞，但在肠道中未发现。鱼类中的粘孢子虫阶段未知。这是海洋多毛纲动物中放射孢子虫阶段的首次记录，但由于与多毛纲动物相比，海洋寡毛纲动物较为罕见，因此后者被认为在海洋粘孢子虫的生命周期中作为无脊椎动物（交替）宿主发挥重要作用。
