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首页> 外文期刊>european journal of phycology >Morphological variability of the potentially toxic dinoflagellateDinophysis sacculus(Dinophyceae) and its taxonomic relationships withD. pavillardiiandD. acuminata
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Morphological variability of the potentially toxic dinoflagellateDinophysis sacculus(Dinophyceae) and its taxonomic relationships withD. pavillardiiandD. acuminata

机译：潜在毒性甲藻Dinophysis sacculus（Dinophyceae）的形态变异性及其与D的分类关系。帕维拉尔迪安德。尖锐

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The identity ofDinophysis sacculusStein has proved to be problematic in recent years, during which this species has been associated with diarrhoetic shellfish poisoning (DSP) events along European coasts. To complement the scarce and at times contradictory existing information, we provide details of morphological variation inD. sacculusthroughout its geographical range, which includes the Mediterranean Sea and European Atlantic coasts. Our data clarify its relationship withD. pavillardiiSchr#xF6;der. This species differs fromD. sacculusonly by the presence of a concavity along the dorsal margin, but transitional morphotypes are frequent in almost all the samples examined. We therefore propose merging the two species and classifying morphotypes with a dorsal concavity asD. sacculusf.reniformis(Pavillard) comb. nov. Despite the high variability ofDinophysis sacculus, it was generally possible to separate it fromD. acuminataClapar#xE8;de amp; Lachmann. The only character distinguishing the two species is the shape of the large hypothecal plates, which inD. sacculusare elongate, almost rectangular or sac-like, whereas inD. acuminatathey are shorter, more convex dorsally and often more slender towards the antapex. Thecal areolation and sulcal list ornamentation are more pronounced inD. acuminata, although these characters are somewhat variable. Other thecal details, such as the shape of sulcal platelets and the structure of the apical pore area, were not useful for circumscription of the two taxa. In a few samples from the Galician Rias and from the Spanish Mediterranean coast, we observed morphotypes intermediate betweenD. sacculusandD. acuminata, which indicates that the two species can have slightly overlapping ranges of variability.
机译：近年来，Dinophysis sacculusStein的身份被证明是有问题的，在此期间，该物种与欧洲沿海的腹泻性贝类中毒（DSP）事件有关。为了补充稀缺且有时相互矛盾的现有信息，我们提供了 D 中形态变异的详细信息。囊状体在其地理范围内，包括地中海和欧洲大西洋沿岸。我们的数据阐明了它与D的关系。帕维拉尔迪施罗德。该物种不同于D。囊仅通过沿背缘存在凹陷，但在几乎所有检查的样本中都经常出现过渡形态型。因此，我们建议将这两个物种合并，并将具有背凹的形态型分类为D。sacculusf.reniformis（Pavillard）梳子。11 月。尽管 Dinophysis sacculus 的变异性很高，但通常可以将其与 D 分开。acuminataClaparède & Lachmann.区分这两个物种的唯一特征是大假设板的形状，其中 D.囊状细长，近长方形或囊状，而inD。尖锐它们较短，背侧更凸，通常朝向对侧更细长。鞘乳晕和脑沟列表装饰在D中更为明显。敏锐度，尽管这些字符有些可变。其他细节，如脑沟血小板的形状和顶端孔隙区域的结构，对两个分类群的界限没有用处。在来自加利西亚里亚斯和西班牙地中海沿岸的几个样本中，我们观察到介于 D 之间的形态型。囊和D。acuminata，这表明这两个物种可以有轻微的重叠变异范围。

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