Department of Zoology, University of Lund, Sweden.
Eur J Protistol. 1989 Oct 27;25(2):172-81. doi: 10.1016/S0932-4739(89)80028-8. Epub 2012 Jan 30.
The new microsporidium Jirovecia involuta is described, based on light and electron microscopy preparations. The host was the oligochaete Limnodrilus hoffmeisteri, collected from a stream in southern Sweden. All developmental stages are diplokaryotic. Mature spores are cylindrical, with a short tail-like projection of exospore material. The spore wall has a uniform exospore. The polaroplast has two regions, anteriorly with closely packed lamellae, posteriorly with tubules. The polar filament has a wide, straight anterior portion, and an approximately equally long, narrow posterior section, forming one coil. Each spore is enclosed in a double-layered sac-like structure, formed by the sporoblast from exospore material. The identity of the species and some traits on the ultrastructural cytology are discussed.
本文基于光镜和电镜标本描述了一种新的微孢子虫——内旋细弱微孢子虫。该宿主为寡毛纲颤蚓科霍夫迈斯特颤蚓，取自瑞典南部的一条溪流。所有发育阶段均为双核。成熟孢子呈圆柱形，具短的外孢子物质尾状突起。孢子壁具均匀的外孢子。极质体有两个区域，前部具紧密排列的薄片，后部具小管。极丝具宽而直的前部和几乎等长的狭窄后部，形成一个线圈。每个孢子被双层囊状结构包裹，该结构由外孢子物质形成的孢原细胞形成。讨论了该物种的身份和一些超微结构细胞学特征。
