Esquamula lacrimiformis n. gen.. n. sp., a new member of thaumatomonads that lacks siliceous scales.
Esquamula lacrimiformis n. gen.. n. sp., a new member of thaumatomonads that lacks siliceous scales.
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泪状鳞甲
DOI：
10.1111/j.1550-7408.2012.00635.x
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发表时间：
2012
影响因子：
2.2
通讯作者：
Ishida K.
中科院分区：
文献类型：
--
作者：
Shiratori T.;Yabuki A.;Ishida K.
本文报道了一种新的裸尾虫鞭毛虫--泪鳞鞭毛虫。例如，在一个实施例中，n.例如，从日本的一个桑迪海滩采集的。细胞长4.5-11.3 μm，宽3.9-8.8 μm，有两条不等长的鞭毛。细胞以平滑的滑动运动移动，并有一个拖曳的长后鞭毛。对小亚基和大亚基核糖体RNA基因的系统发育分析表明，泪形埃里希虫在奇单胞菌纲中形成了一个新的谱系，其成员是具有硅质鳞片的鞭毛虫。然而，我们的光镜和电镜观察表明，E。泪状细胞不具有任何硅质结构。此外，其他形态学特征，如外泌体的形状和微体的结构排列，明显不同于先前描述的thaumatomonads。结合形态学观察和系统发育分析，我们认为E. lacrimiformis应作为一个新属的一个新种，归入一个新科Esquamulidae n. fam.，在Thaumatomonadida之下。
We report a new naked cercozoan flagellate,Esquamula lacrimiformisn. g., n. sp., collected from a sandy beach in Japan. Its cells were 4.5–11.3 μm in length and 3.9–8.8 μm in width and possess two unequal flagella. Cells move in a smooth gliding motion and have a trailing long posterior flagellum. Phylogenetic analyses with small and large subunit ribosomal RNA genes revealed thatE.lacrimiformisforms a novel lineage within the Thaumatomonadida, the members of which are flagellates with siliceous scales. However, our light and electron microscopic observations indicated thatE. lacrimiformiscells do not possess any siliceous structures. Furthermore, other morphological characteristics, such as the shape of the extrusomes and the structural arrangement of the microbody, were clearly different from those of previously described thaumatomonads. On the basis of a combination of these morphological observations and our phylogenetic analyses, we conclude thatE. lacrimiformisshould be treated as a new species of a new genus and placed into a new family, Esquamulidae n. fam., under Thaumatomonadida.