Karenia umbella sp nov (Gymnodiniales, Dinophyceae), a new potentially ichthyotoxic dinoflagellate species from Tasmania, Australia
Karenia umbella sp nov (Gymnodiniales, Dinophyceae), a new potentially ichthyotoxic dinoflagellate species from Tasmania, Australia
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DOI：
10.2216/i0031-8884-43-2-166.1
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发表时间：
2004-03-01
期刊：
影响因子：
1.6
通讯作者：
Hallegraeff, GM
中科院分区：
文献类型：
--
作者：
De Salas, MF;Bolch, CJS;Hallegraeff, GM
描述了一种新的具有潜在鱼毒性的拟裸甲藻Karenia umbella de Salas，Botch & Hallegraeff。它的特点是光和电子显微镜的现场样品和实验室培养，以及大亚基核糖体DNA序列和高性能液相色谱色素分析两个培养菌株。新Karenia种有一个直的顶槽，并含有岩藻黄质衍生的类胡萝卜素色素，属的典型。Karenia umbella与其最近的亲戚K. longicanalis在其较大的尺寸，较长的上锥体与指状沟入侵，不对称形状的下锥体，不规则形状的叶绿体，和存在的6个或8个辐射状沟上的上锥体表面。它不同于K。毛地黄在其显着较大的大小和形状的上锥和下锥。在遗传学上，本种不同于背腹扁平的Karenia种K。mikimotoi，K. brevis和K. brevistulcata。
A new, potentially ichthyotoxic gymnodinioid dinotlagellate, Karenia umbella de Salas, Botch & Hallegraeff is described from Tasmanian coastal waters, Australia. It is characterized by light and electron microscopy of field samples and laboratory cultures, as well as large-subunit ribosomal DNA sequences and high-performance liquid chromatography pigment analyses of two cultured strains. The new Karenia species has a straight apical groove and contains fucoxanthin derivative carotenoid pigments, typical of the genus. Karenia umbella differs from its closest relative K. longicanalis in its larger size, longer epicone with a finger-like sulcal intrusion, asymmetrically shaped hypocone, irregularly shaped chloroplasts, and presence of six or eight radial furrows on the epicone surface. It differs from K. digitala in its significantly larger size and the shape of the epicone and hypocone. Genetically, this species is distinct from the dorsoventrally flattened Karenia species K. mikimotoi, K. brevis, and K. brevistulcata.