Morphological Redescription and Morphogenesis of Urosoma macrostyla (Wrześniowski, 1866) Berger, 1999 (Ciliophora, Hypotrichida)
Morphological Redescription and Morphogenesis of Urosoma macrostyla (Wrześniowski, 1866) Berger, 1999 (Ciliophora, Hypotrichida)
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DOI：
10.4467/16890027ap.11.018.0018
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发表时间：
2011-05
影响因子：
0.5
通讯作者：
Yuhong Qin;Z. Qiu;Chen Shao;A. Warren;Zhuo Shen
中科院分区：
文献类型：
--
作者：
Yuhong Qin;Z. Qiu;Chen Shao;A. Warren;Zhuo Shen
Berger， 1999年，在中国哈尔滨的一个水坑中采集了一种低营养纤毛虫（Urosoma macrostyla, Wrześniowski, 1866），采用活体观察和原targol浸渍法对其形态和形态发生进行了研究。基于以往和目前的研究，本文提供了一种改进的诊断方法。它与同类的主要区别在于机体形状、无皮质颗粒和大核结节的数量。在具有这种体细胞纤毛模式的物种中，大柱头花的个体发生是典型的：口腔原基发育为小细胞发育，fft -anlagen发育为5条和初级模式。然而，在形态发生过程中有一个独特的特征：在亲代结构的右侧，左缘和右缘的羊角素都是从头产生的，这在其他氧化鱼中从未见过。这种特征被认为是一种拟态（Berger 1999）。这表明大柱头草可能在尿瘤属中具有较高的系统发育地位，或者它可能代表一个独特的亚属。
The morphology and morphogenesis of the hypotrich ciliate Urosoma macrostyla (Wrześniowski, 1866) Berger, 1999, collected from a puddle in Harbin, China, were investigated using live observation and protargol impregnation. Based on previous and present studies, an improved diagnosis of U. macrostyla is supplied. It differs from its congeners mainly by the body shape, no cortical granules and number of macronuclear nodules. The ontogenesis of U. macrostyla is typical for species with such a somatic ciliary pattern: the oral primordium develops hypoapokinetally and FVT-anlagen develop in 5-streaks and primary mode. However, a unique characteristic in morphogenetic process is reported: anlagen for both the left and right marginal cirri occur de novo to the right of the parental structure which has never been seen in other oxytrichids. This characteristic was considered an apomorphy (Berger 1999). This indicates that U. macrostyla possibly has a high phylogenetic position within the genus Urosoma , or perhaps it represents a distinct subgenus.