Chomérat Nicolas, Saburova Maria, Bilien Gwenaël, Al-Yamani Faiza
IFREMER, Station de Concarneau, place de la Croix, 29900 Concarneau, France Institute of Biology of the Southern Seas, Pr. Nakhimova, 2, 99011, Sevastopol, Ukraine Kuwait Institute for Scientific Research (KISR), Oceanography and Fisheries Research Program, Aquaculture, Fisheries and Marine Environment Dept., P.O. Box 1638, 22017 Salmiya, KuwaitIFREMER, Station de Concarneau, place de la Croix, 29900 Concarneau, FranceKuwait Institute for Scientific Research (KISR), Oceanography and Fisheries Research Program, Aquaculture, Fisheries and Marine Environment Dept., P.O. Box 1638, 22017 Salmiya, Kuwait.
J Phycol. 2012 Feb;48(1):211-21. doi: 10.1111/j.1529-8817.2011.01102.x. Epub 2012 Jan 10.
A new benthic dinoflagellate species, Prorocentrum bimaculatum sp. nov., is studied from Kuwait's marine sediments, based on detailed morphological and molecular data. Cells are large, oblong oval in shape. They are 49.9-55.3 μm long and 38.4-43.2 μm wide. The ornamentation of this new species is peculiar, and characterized by smooth valves with large pores (0.32-0.50 μm) scattered on their surface, except in two circular patches of ∼15 μm in diameter, devoid of ornamentation and located on both sides of the valve centers. The periflagellar area is widely triangular, located in a moderate excavation of the right valve, and comprises nine platelets. The intercalary band of P. bimaculatum is smooth. The molecular phylogenetic position of this new taxon was inferred from SSU and LSU rDNA genes. In both phylogenetic analyses, P. bimaculatum branched with high support with Prorocentrum consutum and formed a clade sister to the one including P. lima and related species such as P. arenarium, P. belizeanum, P. hoffmannianum, and P. maculosum. From the phylogenetic study, since most species related to P. bimaculatum are known for their toxic effects and production of okadaic acid, this new species can be considered as a potential toxin producer, but this has to be analyzed.
基于详细的形态学和分子数据，对从科威特海洋沉积物中发现的一种新的底栖甲藻物种——双斑原甲藻（Prorocentrum bimaculatum sp. nov.）进行了研究。细胞较大，呈长椭圆形。细胞长49.9 - 55.3微米，宽38.4 - 43.2微米。这个新物种的纹饰独特，其特征是瓣膜表面光滑，散布着大孔（0.32 - 0.50微米），但在直径约15微米的两个圆形斑块处没有纹饰，这两个斑块位于瓣膜中心两侧。鞭毛周区呈宽三角形，位于右瓣膜的适度凹陷处，由九个小板组成。双斑原甲藻的间插带光滑。该新分类单元的分子系统发育位置是根据小亚基（SSU）和大亚基（LSU）核糖体DNA基因推断出来的。在这两种系统发育分析中，双斑原甲藻与康氏原甲藻（Prorocentrum consutum）高度支持地分支，并形成一个分支，该分支是包括利马原甲藻（P. lima）以及诸如砂栖原甲藻（P. arenarium）、伯利兹原甲藻（P. belizeanum）、霍夫曼原甲藻（P. hoffmannianum）和斑点原甲藻（P. maculosum）等相关物种的分支的姐妹分支。从系统发育研究来看，由于与双斑原甲藻相关的大多数物种都以其毒性作用和冈田酸的产生而闻名，所以这个新物种可被视为潜在的毒素生产者，但这还有待分析。
