Kudryavtsev Alexander
Department of Invertebrate Zoology, Faculty of Biology and Soil Sciences, Saint-Petersburg State University, Universitetskaja nab., 7/9, 199034 Saint-Petersburg, Russia.
Eur J Protistol. 2006 Jul;42(2):77-89. doi: 10.1016/j.ejop.2005.12.002. Epub 2006 Feb 3.
Only two species of Cochliopodium below 20mum in size are currently known. These are the recently described marine Cochliopodium gallicum Kudryavtsev and Smirnov, 2006 and a freshwater C. minutum West, 1901, an incompletely described species that has never been re-isolated since its initial description. In this paper, the descriptions of three independent species of similar size below 20microm, C. minutoidum, C. kieliense, and C. maeoticum are presented. In the light microscope they all resemble the description of C. minutum, C. minutoidum being most similar to this species. However, the available description of C. minutum is inadequate to permit the assignment of any strain to this species with confidence. Therefore, a status of nomen dubium is proposed for C. minutum. Furthermore, C. minutoidum appears to be very similar to a fish endobiont identified by Dyková et al. (1998. Cochliopodium minus, a scale-bearing amoeba isolated from organs of perch Perca fluviatilis. Dis. Aquat. Org. 34, 205-210) as C. minus. Direct comparison of my strain of C. minutoidum with the type strain of C. minus suggests that it is not identical to C. minus. The obtained data enabled me to add the ultrastructural features to the diagnosis of C. minus for more precise identification of this species.
目前已知只有两种大小在20微米以下的旋口虫属物种。它们是最近描述的海洋旋口虫（Cochliopodium gallicum Kudryavtsev和Smirnov，2006年）以及一种淡水旋口虫（C. minutum West，1901年），后者是一个描述不完整的物种，自最初描述以来从未被重新分离出来。在本文中，呈现了三种独立的、大小在20微米以下的类似物种的描述，即微小旋口虫（C. minutoidum）、基尔旋口虫（C. kieliense）和美奥旋口虫（C. maeoticum）。在光学显微镜下，它们都与微小旋口虫的描述相似，微小旋口虫与该物种最为相似。然而，微小旋口虫的现有描述不足以让人有信心将任何菌株归为该物种。因此，提议将微小旋口虫列为疑名。此外，微小旋口虫似乎与Dyková等人（1998年。微小旋口虫（Cochliopodium minus），一种从鲈鱼（Perca fluviatilis）器官中分离出的有鳞片变形虫。《水生生物疾病》34，205 - 210）鉴定为微小旋口虫的一种鱼类内共生体非常相似。将我的微小旋口虫菌株与微小旋口虫模式菌株直接比较表明，它与微小旋口虫并不相同。所获得的数据使我能够为微小旋口虫的诊断补充超微结构特征，以便更精确地鉴定该物种。
