Vďačný Peter, Foissner Wilhelm
Department of Zoology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B-1, 842 15 Bratislava, Slovak Republic.
FB Ecology and Evolution, Faculty of Natural Sciences, Salzburg University, Hellbrunnerstrasse 34, 5020 Salzburg, Austria.
Eur J Protistol. 2017 Apr;58:35-76. doi: 10.1016/j.ejop.2016.12.001. Epub 2016 Dec 13.
Six metopid ciliates from soil of the Murray River floodplain in Australia were studied using live observation, various silver impregnation methods, scanning electron microscopy, and multivariate statistics. One of the species is affiliated with M. setosus while the others represent new taxa. Metopus filum nov. spec. is distinguished from most congeners by the slender body, the absence of cortical granules, and the low number of ciliary rows and adoral polykinetids. Metopus palaeformides nov. spec. most resembles Heterometopus palaeformis (Kahl, 1927) Foissner, 2016b but they can be distinguished by body size, the number of adoral polykinetids, and the oral area pattern. Metopus murrayensis nov. spec. is outstanding in having a globular macronucleus surrounded by innumerable refractive granules and a conspicuously thick preoral dome. Metopus rex nov. spec. and M. magnus nov. spec. are easily distinguished from most congeners by their large body size and the shape of the macronucleus. Moreover, M. rex displays up to 30μm long endosymbiotic bacteria while the micronucleus of M. magnus is uniquely situated in a small macronuclear concavity. Multivariate statistics corroborates the distinctness of these six metopid populations.
利用活体观察、多种银浸染方法、扫描电子显微镜和多元统计方法，对来自澳大利亚墨累河泛滥平原土壤中的六种扁形纤毛虫进行了研究。其中一个物种隶属于刚毛扁形虫，而其他物种则代表新的分类群。丝状扁形虫新种在形态上与大多数同属物种不同，其身体细长，没有皮层颗粒，纤毛排和口前多动基体数量较少。古形扁形虫新种与古形异扁形虫（卡尔，1927年）福斯纳，2016b最为相似，但它们可以通过体型、口前多动基体数量和口区模式来区分。墨累河扁形虫新种的显著特征是有一个被无数折射颗粒包围的球状大核和一个明显增厚的口前穹顶。霸王扁形虫新种和大扁形虫新种很容易通过它们的大体型和大核形状与大多数同属物种区分开来。此外，霸王扁形虫显示出长达30μm的内共生细菌，而大扁形虫的微核独特地位于一个小的大核凹陷处。多元统计证实了这六个扁形虫种群的独特性。
