Madanidinium loirii gen. et sp. nov. (Dinophyceae), a new marine benthic dinoflagellate from Martinique Island, Eastern Caribbean
Madanidinium loirii gen. et sp. nov. (Dinophyceae), a new marine benthic dinoflagellate from Martinique Island, Eastern Caribbean
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马达尼丁藻 Loirii gen.
DOI：
10.1080/09670262.2014.898797
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发表时间：
2014
影响因子：
2.4
通讯作者：
Gwenael Bilien
中科院分区：
文献类型：
--
作者：
N. Chomérat;Gwenael Bilien
在马提尼克岛热带海洋海湾的沉积物中发现了一种新的底栖光养鞭毛藻，并利用光镜和电子显微镜对其微观形态进行了研究。细胞含有小的金棕色叶绿体，卵圆形核在后部。它是横向压缩的，从侧面看几乎是圆形的。它由一个向右侧倾斜的小上皮和一个较大的下膜组成。左图，扣带较前，上皮缩小。扣带移位，左旋。这种生物的独特之处在于没有顶孔，其膜板排列为2’1 ~ 7’5 ~ 5’5’1’”。这些板是光滑的，表面散布着小群的孔隙。在靠近2英寸板块中心的左侧，发现有60-80个密集排列的孔隙。在形态上，这些特征不同于所有其他横向压缩底栖生物属。此外，SSU和部分LSU的分子遗传序列在鞭毛纲中形成了一个独特的、得到良好支持的分支，并支持了一个新属的建立。然而，从核糖体基因推断的分子系统发育未能证实与其他底栖动物类群的任何明确关系，并且与其他侧压鞭毛虫的亲和力尚未得到证实。因此，目前尚不清楚该植物在分类上是否具有明确的目和科。
A new benthic phototrophic dinoflagellate is described from sediments of a tropical marine cove at Martinique Island and its micromorphology is studied by means of light and electron microscopy. The cell contains small golden-brown chloroplasts and the oval nucleus is posterior. It is laterally compressed, almost circular in shape when viewed laterally. It consists of a small epitheca tilted toward the right lateral side and a larger hypotheca. In the left view, the cingulum is more anterior and the epitheca is reduced. The cingulum is displaced and left-handed. This organism is peculiar in having no apical pore and its thecal plate arrangement is 2′ 1a 7′′ 5c 3s 5′′′ 1′′′′. The plates are smooth with small groups of pores scattered on their surface. An area with 60–80 densely arranged pores is found near the centre of the 2′′′ plate, on the left lateral side. Morphologically, these features are different from all other laterally compressed benthic genera. In addition, molecular genetic sequences of SSU and partial LSU form a distinct and well-supported clade among dinoflagellates and support the erection of a new genus. However, molecular phylogenies inferred from ribosomal genes failed to confirm any clear relationship with other benthic taxa and affinity with other laterally compressed dinoflagellates has not been demonstrated. Hence, the taxonomic affinity of Madanidinium loirii with a defined order and family is unclear at the moment.
影响因子：
1.5
作者：
M. Hoppenrath;T. Horiguchi;Y. Miyoshi;M. Selina;“Max” F. J. R. Taylor;B. Leander
通讯作者：
M. Hoppenrath;T. Horiguchi;Y. Miyoshi;M. Selina;“Max” F. J. R. Taylor;B. Leander