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首页> 外文期刊>Journal of nannoplankton research: A publication of the International Nannoplankton Association >Petasaria heterolepis (Prymnesiaceae) from the southern Indian Ocean
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Petasaria heterolepis (Prymnesiaceae) from the southern Indian Ocean

机译：来自南方印度洋的Petasaria heterolepis（刺激性）

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摘要

Sea-surface (0-110 m) water samples, which were collected from the southern Indian Ocean between 39°S and 65°S (along ~48°E and 57.3°E) during the austral summer of 2010, yielded Petasaria heterolepis. Of the two known P. heterolepis forms, the scales with a brim were observed with a size range (short and long axes length) of 1.68×1.80 μm and 2.17×2.27 μm. There were minute pores on the scales, except on the brim,which was poreless. An elemental analysis of the scales revealed that silica (Si) was the major constituent, together with a small amount of calcium (Ca). Petasaria heterolepis was neither recognizable in the fossil record nor in the bottom sediments. This species has an affinity with the extant haptophyte Prymnesium neolepis, which has been recorded from off the Japan coast and in the southern Indian Ocean. The present study highlights the occurrence of P. heterolepis in open-ocean regions of the Southern Ocean, stressing its ability to grow under diverse oceanographic conditions. The phylogenetic-molecular aspects need to be investigated, which could reveal a better understanding of the rare and combined Si and Ca accumulation among siliceous haptophyte algae.
机译：海面（0-110米）的水样，在2010年南部的南部的39°S和65°S（沿着〜48°E和57.3°E）之间的南部印度洋收集，产生Petasaria Heteropis。在两个已知的P.Perforopis形式中，观察到具有Brim的尺度，尺寸范围（短轴长度）为1.68×1.80μm和2.17×2.27μm。在鳞片上有一分钟的毛孔，除了在峡谷上，无没有。对鳞片的元素分析显示，二氧化硅（Si）是主要成分，以及少量钙（CA）。 Petasaria heteropis既不识别化石记录，也不是底部沉积物。该物种与现存的触觉野患NeoLepis具有亲和力，该幼高值已经从日本海岸和南方印度洋中记录。本研究突出了南海开阔海洋地区P.Venderopis的发生，强调其在各种海洋情况下生长的能力。需要研究系统发育分子方面，这可能揭示了对硅质抗藻藻藻类中罕见和合并的Si和Ca积累的更好理解。

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