Taxonomy, morphology and molecular systematics of three oligotrich ciliates, including a description of Apostrombidium parakielum spec. nov. (Ciliophora, Oligotrichia).
Taxonomy, morphology and molecular systematics of three oligotrich ciliates, including a description of Apostrombidium parakielum spec. nov. (Ciliophora, Oligotrichia).
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DOI：
10.1099/ijs.0.048314-0
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发表时间：
2013-03
影响因子：
2.8
通讯作者：
Wen Song;Jia-Mei Li;Weiwei Liu;Jiamei Jiang;K. Al-Rasheid;Xiaozhong Hu
中科院分区：
文献类型：
--
作者：
Wen Song;Jia-Mei Li;Weiwei Liu;Jiamei Jiang;K. Al-Rasheid;Xiaozhong Hu
从中国沿海水域采集了3种寡营养的毛虫，Apostrombidium parakielum spec11 ., Novistrombidium apsheronicum (Alekperov & Asadullayeva, 1997) Agatha， 2003和Novistrombidium testaceum (Anigstein, 1914) Song & Bradbury, 1998，对它们的形态和小亚基rRNA （SSU rRNA）基因序列进行了研究。该新种可以通过其倒圆锥形的身体形状，14-16个前膜和6-8个腹膜，三部分的躯体运动和明显长的背纤毛来识别。根据这一新种的资料，提供了一种改进的Apostrombidium属的诊断。本文还对本研究收集到的大褐蝽和小褐蝽的种群进行了描述，并与已有的描述进行了比较。此外，从它们的SSU rRNA基因序列数据推断出这三个物种的系统发育位置。结果表明，以往未利用分子信息讨论系统分类学的Apostrombidium属与Varistrombidium kielum和Omegastrombidium elegans聚集在一起，而N. testaceum和N. apsheronicum形成一个单一的分支。
Three oligotrich ciliates, Apostrombidium parakielum spec. nov., Novistrombidium apsheronicum (Alekperov & Asadullayeva, 1997) Agatha, 2003 and Novistrombidium testaceum (Anigstein, 1914) Song & Bradbury, 1998 were collected from the coastal waters of China and their morphology and small-subunit rRNA (SSU rRNA) gene sequences were studied. The novel species can be recognized by the combination of its obconical body shape, 14-16 anterior and 6-8 ventral membranelles, somatic kinety in three parts and conspicuously long dorsal cilia. Based on the data obtained for this novel species, an improved diagnosis of the genus Apostrombidium is supplied. Descriptions of the population of N. apsheronicum and N. testaceum collected in this study are also provided and compared with the existing descriptions. In addition, the phylogenetic positions of these three species are inferred from their SSU rRNA gene sequence data. The results indicate that the genus Apostrombidium, the systematics of which has not previously been discussed using molecular information, clusters with Varistrombidium kielum and Omegastrombidium elegans, whereas N. testaceum and N. apsheronicum form a single clade.