CELL WALL MORPHOLOGY AND SYSTEMATIC IMPORTANCE OF THALASSIOSIRA RITSCHERI (HUSTEDT) HASLE, WITH A DESCRIPTION OF SHIONODISCUS GEN. NOV.
CELL WALL MORPHOLOGY AND SYSTEMATIC IMPORTANCE OF THALASSIOSIRA RITSCHERI (HUSTEDT) HASLE, WITH A DESCRIPTION OF SHIONODISCUS GEN. NOV.
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THALASSIOSIRA RITSCHERI (HUSTEDT) HASLE 的细胞壁形态和系统重要性，以及盐盘藻属的描述。
DOI：
10.1080/0269249x.2006.9705667
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发表时间：
2006
期刊：
影响因子：
1.8
通讯作者：
E. Theriot
中科院分区：
文献类型：
--
作者：
Andrew J. Alverson;Sung;E. Theriot
中心硅藻Thalassiosirales包括所有具有fultoportula（支撑过程）的硅藻，这一特征现在被认为是该谱系的突触形态。在海链藻目中，海链藻可能是分类学上和形态学上最多样的属，并且至少有两个不同的形态学类群已经被确认。nordenskioeldii，在瓣套上有短的向内延伸和长的向外延伸的支撑突起和唇形突起。组"B"物种具有特别长的向内和减少向外延伸的支撑过程，和唇形的过程上的阀面。采集并培养了具有A、B类群特征的瑞氏海链藻。它在瓣膜表面上具有唇形突起，并且支撑突起的向外延伸减少。我们首次证明T. ritscheri有短的向内，A型延伸的支撑过程。这些条件的系统发育的解释表明，T。ritscheri和传统上持有的"B"类物种。通过远离阀套的唇状突起的自形条件诊断的物种，包括许多组"B"海链藻种，被转移到Shionodiscus gen. nov.
The centric diatom order Thalassiosirales includes all diatoms with a fultoportula (strutted process), a feature now recognized as a synapomorphy for the lineage. Within Thalassiosirales, Thalassiosira is perhaps the most taxonomically and morphologically diverse genus, and at least two distinct morphological groups have been recognized within it. Group “A” Thalassiosira species, which include the type species, T. nordenskioeldii, have short inward and long outward extensions of the strutted processes and a labiate process on the valve mantle. Group “B” species have exceptionally long inward and reduced outward extensions of the strutted processes, and a labiate process on the valve face. We collected and cultured Thalassiosira ritscheri, which has a combination of group A and B characters. It has a labiate process on the valve face and reduced outward extensions of the strutted processes. We show for the first time that T. ritscheri has short inward, A-type extensions of the strutted processes. A phylogenetic interpretation of these conditions suggests a close relationship between T. ritscheri and the traditionally held group “B” species. Species diagnosed by the autapomorphic condition of a labiate process away from the valve mantle, including many group “B” Thalassiosira species, are transferred into Shionodiscus gen. nov.