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首页> 外文期刊>Polar biology >A new Antarctic association: the case of the hydroid Sarsia medelae (new sp.) associated with gorgonians
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A new Antarctic association: the case of the hydroid Sarsia medelae (new sp.) associated with gorgonians

机译:一个新的南极联合体:与水牛相关的水体Sarsia medelae(新物种)病例

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摘要

Sarsia medelae sp. nov. is described and illustrated from material collected in the Weddell Sea during the R/V Polarstern cruises ANT XVII/3 (April 2000) and in the Ross Sea during the R/V Italica cruise XIX (March 2004). The specimens have always been observed in association with several gorgonians of genera Thouarella sp., Primnoisis sp., and Notisis sp. The polyps of Sarsia medelae are considered as mesobiont of the gorgonian host with a non-parasitic relationship. It is the first time that this kind of association, which is so far only known from the Indian and Pacific Ocean, is reported in the Southern Ocean. This finding is discussed in the framework of the hypothesis that a part of Antarctic fauna has its origin in species dating back to before the Cretaceous period, because this kind of association between a hy-droid and a gorgonian host being only known in the actual Antarctic shelf and in regions belonging to the previous Thethys areas.
机译:Sarsia medelae sp。十一月从R / V Polarstern轮ANT XVII / 3(2000年4月)在韦德尔海和R / V Italica轮XIX(2004年3月)在罗斯海收集的材料中进行了描述和说明。一直观察到这些标本与Thouarella属,Primnoisis属和Notisis属的几位高粱属有关。 Sarsia medelae的息肉被认为是具有非寄生关系的高宿主宿主的近缘。迄今为止,这是第一次在南大洋报道这种迄今仅从印度洋和太平洋知道的这种关联。在以下假设的框架内讨论了这一发现:南极动物区系的一部分起源于白垩纪之前的物种,因为这种水体与高良种寄主之间的这种关联仅在实际的南极才知道架子和以前的Thethys地区的区域。

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