Gonyaulax taylorii, a new yessotoxins-producer dinoflagellate species from Chilean waters

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• 作者：Gonzalo Á ; lvarez^a ; ^{gmalvarez@ucn.cl" class="auth_mail" title="E-mail the corresponding author} ; Eduardo Uribe^a ; Jorge Regueiro^b ; Juan Blanco^b ; Santiago Fraga^c ; ^{santi.fraga@vi.ieo.es" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Gonyaulax taylorii ; Yessotoxin ; Homoyessotoxin ; Mejillones ; Chile
• 刊名：Harmful Algae
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：58
• 期：Complete
• 页码：8-15
• 全文大小：1541 K

文摘

In summer 2009, during a survey in Bahía Mejillones, a dense bloom of a dinoflagellate from the genus Gonyaulax was detected, as well as the presence of yessotoxin. Phytoplankton samples were analyzed in detail by light and scanning electron microscopy (SEM), revealing the presence of Gonyaulax taylorii. Morphological examination showed that the cells in the bloom fit in Gonyaulax jollifei Murray et Whitting sensu Dodge, subsequently classified as Gonyaulax taylorii by Carbonell-Moore. In this context, some inconsistencies have been found in regard to the holotype; the plate 1”’ appears as two plates, 1‴ and 2‴, showing a suture that does not exist in Dodge’s figure of G. jollifei, from where the holotype was drawn, nor within the samples collected. Therefore, this plate has been originally described erroneously as two plates named 1”’ and 2”’ instead of only one named 1‴. After this correction, this species has five instead of six postcingular plates. For this reason, the description of this species must be emended. Phytoplankton net samples were found to contain yessotoxin and homoyessotoxin, with concentrations below 1 pg cell⁻¹. The present study identifies, therefore, the dinoflagellate G. taylorii as a new source of yessotoxins.