A taxonomic study of the Elachista taeniaeformis complex and E. vellosa from the western Pacific (Elachistaceae, Phaeophyceae)
A taxonomic study of the Elachista taeniaeformis complex and E. vellosa from the western Pacific (Elachistaceae, Phaeophyceae)
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西太平洋 Elachista taeniaeformis 复合体和 E. vellosa（Elachistaceae、Phaeophyceae）的分类学研究
DOI：
10.2216/i0031-8884-40-1-67.1
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发表时间：
2001
期刊：
影响因子：
1.6
通讯作者：
M. Masuda
中科院分区：
文献类型：
--
作者：
S. Uwai;K. Kogame;M. Masuda
本文报道了三种在许多特征上相似的褐藻-带状钩虾Elachista taeniaeformis、松弛钩虾Elachista flaccida和棒形多指藻Myriactula clavata，它们构成了一个复合体，我们称之为E。taeniaeformis复合体，在西太平洋的同化丝的锥形程度，存在或不存在的phaeophycean毛，和存在或不存在的paraphyses区分。形态观察和实验室培养实验的基础上收集来自日本各地的表明，这些形态特征不同，这取决于生长季节，实验培养条件和年龄。这些和其他四个elachistacean物种的nrRNA基因的ITS区域的基础上，分子系统发育分析显示，所有样品的三个类群之间的密切关系。形态学和分子生物学数据表明，该属仅有一个种，即E. taeniaeformis存在于复合体中，而真正的E.软枝藻应排除在西太平洋海藻植物群之外。Myriactula clavata与E.条带形（Elachista sadoensis）。Elachista vellosa与E. taeniaeformis的分子系统发育分析，但区别于它的形态学上有轻微的锥形同化丝逐渐收缩的基地。
Abstract Three brown algae, Elachista taeniaeformis, Elachista flaccida and Myriactula clavata, which seem to resemble one another in many features and constitute a complex that we call the E. taeniaeformis complex, have been distinguished in the western Pacific by the degree of tapering of the assimilatory filaments, the presence or absence of phaeophycean hairs, and the presence or absence of paraphyses. Morphological observations and laboratory culture experiments based on collections from various localities in Japan indicated that these morphological characters vary, depending on the growing season, experimental culture conditions and age. Molecular-phylogenetic analyses of these and four other elachistacean species, based on ITS regions of the nrRNA gene, showed a close relationship between all samples of the three taxa. Morphological and molecular data indicate that only a single species, E. taeniaeformis, is present within the complex and that genuine E. flaccida should be excluded from the western Pacific marine algal flora. Myriactula clavata is synonymized with E. taeniaeformis, as is Elachista sadoensis. Elachista vellosa is closely related to E. taeniaeformis in the molecular-phylogenetic analyses but is distinguished from it morphologically by having slightly tapering assimilatory filaments with gradually constricted bases.