Two novel marine Frontonia species, Frontonia mengi spec. nov and Frontonia magna spec. nov (Protozoa; Ciliophora), with notes on their phylogeny based on small-subunit rRNA gene sequence data
Two novel marine Frontonia species, Frontonia mengi spec. nov and Frontonia magna spec. nov (Protozoa; Ciliophora), with notes on their phylogeny based on small-subunit rRNA gene sequence data
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两种新的海洋 Frontonia 物种，Frontonia mengi 规格。
DOI：
10.1099/ijs.0.024794-0
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发表时间：
2011-06-01
影响因子：
2.8
通讯作者：
Warren, Alan
中科院分区：
文献类型：
--
作者：
Fan, Xinpeng;Chen, Xiangrui;Warren, Alan
对两种新的海洋纤毛虫Frontonia mengi spec. nov.和Frontonia magna spec. nov.的形态和纤毛下结构进行了研究，采用活体观察法和银浸渍法对我国北方和南方沿海沃茨中分离的20株中华绒螯蟹进行了调查。孟氏额孔虫新种Frontonia mengi spec. nov.具有细长的体型，长宽比约为5：1，约52个体节和口部器官的结构。大型Frontonia magna spec. nov.的特征是体型巨大，体动器约200个，前庭动器5 ~ 6个，四列纤毛1 ~ 3个。基于小亚基rRNA基因序列，采用贝叶斯推理和最大简约法构建系统发育树。结果表明，F. mengi和F.在Frontonia的“核心”进化枝内，也包括Frontonia lynni和Frontonia tchibisoeni，并且Frontonia属可能是多系的，因为一个物种Frontonia didieri总是与草履虫和Apofrontonia一起群。
The morphology and infraciliature of two novel marine ciliates, Frontonia mengi spec. nov. and Frontonia magna spec. nov., isolated from coastal waters in northern and southern China, respectively, were investigated using living observation and silver impregnation methods. Frontonia mengi spec. nov. is characterized by its slender body shape, with a length-to-width ratio of about 5 : 1, about 52 somatic kineties and the structure of its buccal apparatus. Frontonia magna spec. nov. can be recognized by the combination of huge body size, about 200 somatic kineties, five or six vestibular kineties and four-rowed peniculi 1-3. Phylogenetic trees based on small-subunit rRNA gene sequences were constructed by means of Bayesian inference and maximum-parsimony. Results showed that F. mengi and F. magna are sister to each other within the 'core' clade of Frontonia that also includes Frontonia lynni and Frontonia tchibisovae and that the genus Frontonia may be polyphyletic, because one species, Frontonia didieri, always groups with Paramecium and Apofrontonia.