Heterocapsa psammophila sp. nov. (Peridiniales, Dinophyceae), a new sand‐dwelling marine dinoflagellate
Heterocapsa psammophila sp. nov. (Peridiniales, Dinophyceae), a new sand‐dwelling marine dinoflagellate
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DOI：
10.1111/j.1440-183.2005.00398.x
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发表时间：
2005-12
影响因子：
1.5
通讯作者：
Maiko Tamura;M. Iwataki;T. Horiguchi
中科院分区：
文献类型：
--
作者：
Maiko Tamura;M. Iwataki;T. Horiguchi
本文报道采自日本广岛县隐民之滨海滩的甲藻一新种--Heterocapsa psammophila Tamura，Iwataki et Horiguchi sp. nov.。该甲藻具有异囊藻属（Heterocapsa）的典型鞘板排列方式，Po，cp，5′，3a，7 ″ ″，6c，5s，5 ″ ″，2 ″，以及异囊藻属（Heterocapsa）在质膜上的三维体鳞。细胞呈卵圆形。球形核和蛋白核分别位于下囊和上皮层。超微结构观察表明，H. psammophila是典型的甲藻，蛋白核被胞质小管内陷。H. psammophila与迄今为止描述的所有其他Heterocapsa物种的区别在于细胞形状，核和蛋白核的相对位置以及身体鳞片的结构。这种新物种在文化中的栖息地和行为表明，这种生物确实是一种沙栖物种。
A new armored dinoflagellate species, Heterocapsa psammophila Tamura, Iwataki et Horiguchi sp. nov. is described from Kenmin‐no‐hama beach, Hiroshima, Japan using light and electron microscopy. This dinoflagellate possesses the typical thecal plate arrangement of the genus Heterocapsa, Po, cp, 5′, 3a, 7′′, 6c, 5s, 5′′′, 2′′′′; and the 3‐D body scales of Heterocapsa on the plasma membrane. The cell shape is ovoidal. The spherical nucleus and the pyrenoid are situated in the hypotheca and the epitheca, respectively. The ultrastructure of H. psammophila is typical of dinoflagellates and the pyrenoid is invaginated by cytoplasmic tubules. H. psammophila is distinguished from all other hitherto‐described Heterocapsa species by the cell shape, the relative position of the nucleus and pyrenoid and the structure of the body scale. The habitat and behavior of this new species in culture suggest that the organism is truly a sand‐dwelling species.