Morphological and molecular characterization of Histiobalantium natans viridis Kahl, 1931 (Ciliophora, Scuticociliatia)
Morphological and molecular characterization of Histiobalantium natans viridis Kahl, 1931 (Ciliophora, Scuticociliatia)
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DOI：
10.1016/j.ejop.2008.11.003
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发表时间：
2009-08-01
影响因子：
2.9
通讯作者：
Shimano, Satoshi
中科院分区：
文献类型：
--
作者：
Foissner, Wilhelm;Kusuoka, Yasushi;Shimano, Satoshi
我们利用现场观察、银浸渍和小亚基 rRNA 基因序列，研究了来自日本古代琵琶湖的绿色组织平衡藻种群。形态学和分子数据显示，Histiobalantium、Schizocalyptra 和 Pleuronema 之间存在密切关系，支持侧线虫科 Kent，其近亲是 Cyclidiidae Ehrenberg。无论是核苷酸序列还是形态学数据均不支持Histiobalantiidae Puytorac 和Corliss 科，除了细胞胞质体的奇怪的背部位置之外。同样，数据并不支持将 Histiobalantium 纳入 Sulcigeridae Gajewskaja 科，正如 Jankowski 最近所建议的那样，其分类是基于错误识别的 Sulcigera comosa。此外，有充分的理由将 Gajewskiella Obolkina 属与 Histiobalantium 同义词。 H. natans 的欧洲和亚洲种群在 Adoral membranelle 1 的结构上存在显着差异，表明它们是不同的物种。然而，有迹象表明，这些差异是由于欧洲 H. natans 数据不足造成的，因此需要对其进行详细的重新描述。这也适用于北美的Histiobalantium Agile Stokes，它可能与欧亚的H. natans 不同种。由于缺乏来自 nigricans 的详细数据，H. natans viridis 和 H. natans nigricans 的状况尚不清楚。在目前的知识水平上，我们更喜欢亚特定的等级。 (C) 2008 爱思唯尔有限公司。版权所有。
We investigated a Histiobalantium natans viridis population from the ancient Lake Biwa in Japan, using live observation, silver impregnation, and the small subunit rRNA gene sequence. The morphological and molecular data show, with high support, a close relationship of Histiobalantium, Schizocalyptra and Pleuronema, supporting the family Pleuronematidae Kent, whose nearest relatives are the Cyclidiidae Ehrenberg. A family Histiobalantiidae Puytorac and Corliss is not supported, either by the nucleotide sequences or the morphologic data, except for the curious dorsal location of the cytopyge. Likewise, the data do not support inclusion of Histiobalantium in the family Sulcigeridae Gajewskaja, as very recently suggested by Jankowski, whose classification is based on a misidentified Sulcigera comosa. Further, there are good reasons to synonymize the genus Gajewskiella Obolkina with Histiobalantium. The European and Asian populations of H. natans differ significantly in the structure of adoral membranelle 1, suggesting that they are different species. However, there is some indication that the differences are caused by deficient data on the European H. natans, which is thus in need of detailed redescription. This applies also to the North American Histiobalantium agile Stokes which is probably not conspecific with the Eurasian H. natans. The status of the forma H. natans viridis and H. natans nigricans is not known because detailed data from nigricans are lacking. We prefer subspecific rank at the present state of knowledge. (C) 2008 Elsevier GmbH. All rights reserved.