Morphology, Cell Division, and Phylogeny of Uroleptus longicaudatus (Ciliophora, Hypotricha), a Species of the Uroleptus limnetis Complex
Morphology, Cell Division, and Phylogeny of Uroleptus longicaudatus (Ciliophora, Hypotricha), a Species of the Uroleptus limnetis Complex
复制标题
长尾尾毛虫（Ciliophora，Hypotricha）的形态学、细胞分裂和系统发育，长尾尾毛虫复合体的一种
DOI：
10.1111/jeu.12284
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发表时间：
2016-05-01
影响因子：
2.2
通讯作者：
Berger, Helmut
中科院分区：
文献类型：
--
作者：
Chen, Lingyun;Lv, Zhao;Berger, Helmut
摘要对中国一个鲜为人知的淡水低营养长尾尾龙种群进行了调查，重点研究了其生活形态和基础设施。典型的三部分身体包括狭窄的（头状）前部，细长的躯干和长而细长且收缩强烈的尾巴，占体长的30%。尾长约12%的收缩标本与limnetis尾长尾尾龙（Uroleptus longicaudatus）非常相似，后者的类型分布在美国东海岸，因此不能排除这两个物种是同义的。因此，我们建议将这些和其他一些鲜为人知的物种，在目前的知识状态下不能清楚地区分，作为limnetis复合体。长尾鳗的形态发生过程与大多数同系物一样。系统发育分析表明，尾足龙是一个单系类群，但由于迄今为止缺乏详细的种群形态学数据，该分类单元内的关系仍然不清楚。为了客观地确定双头鱼的尾巴长度，我们提出了“1/3法”，即尾巴从最大宽度的三分之一处开始。栉尾蛇，1954年转译为栉尾蛇：栉尾蛇（Gelei, 1954）梳子。11月。
A Chinese population of the little-known freshwater hypotrich Uroleptus longicaudatus was investigated with emphasis on its living morphology and infraciliature. The characteristic, tripartite body consists of a narrowed (cephalized) anterior portion, a slender trunk, and a long, slender, and strongly contractile tail occupying up to 30% of body length. Contracted specimens with a tail length of about 12% closely resemble Uroleptus limnetis which has, like U. longicaudatus, its type locality on the East Coast of the United States so that it cannot be excluded that these two species are synonymous. Thus, we propose to subsume these and few other little-known species, which are not clearly distinguishable at the present state of knowledge, as U. limnetis complex. The morphogenesis of U. longicaudatus proceeds as in most congeners. The phylogenetic analyses reveal that Uroleptus is a monophyletic group, but due to the lack of detailed morphological data of the populations sequenced so far, the relationships within this taxon remain obscure. For the objective determination of the tail length of hypotrichs, we propose the "1/3-method", which says that the tail commences at that body width which corresponds one-third of the maximum width. Paruroleptus ophryoglena Gelei, 1954 is transferred to Uroleptus: Uroleptus ophryoglena (Gelei, 1954) comb. nov.