Do bipolar distributions exist in marine sponges? Stylocordyla chupachups sp. nv. (Porifera: Hadromerida) from the Weddell Sea (Antarctic), previously reported as S. borealis (Loven, 1868)

Maria-J. Uriz; Josep-Maria Gili; Covadonga Orejas; Alida-R. Perez-Porro

首页> 外文期刊>Polar biology >Do bipolar distributions exist in marine sponges? Stylocordyla chupachups sp. nv. (Porifera: Hadromerida) from the Weddell Sea (Antarctic), previously reported as S. borealis (Loven, 1868)

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Do bipolar distributions exist in marine sponges? Stylocordyla chupachups sp. nv. (Porifera: Hadromerida) from the Weddell Sea (Antarctic), previously reported as S. borealis (Loven, 1868)

机译：海洋海绵中是否存在双极性分布？香囊菌chupachups sp。 nv。（Porifera：Hadromerida）来自Weddell Sea（Antarctic），以前被报道为S.borealis（Loven，1868年）

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Sponges are the dominant invertebrates in many Antarctic communities, where they play a decisive structural function thanks to their abundance and large sizes. However, current knowledge on Antarctic sponges remains poor even with respect to basic aspects such as taxonomy. Here, we report on an Antarctic species of the genus Stylocordyla, which has been recorded for a long time under the name of the boreal S. borealis due to spicule and growth habit similarities. A thorough study of dense populations of the only Stylocordyla species known up to now from the eastern zone of the Weddell Sea as well as the re-examination of several specimens (including the type material) of S. borealis has allowed us to assess the variability of the boreal species and to confirm that the austral species is not S. borealis (Loven, 1868) but a new species of Stylocordyla, different from the other congeners recorded from southern latitudes. The new species S. chupachups commonly dwells on horizontal or slighted sloped hard bottoms of the continental shelf of Weddell Sea, from 100 m to below 400 m depth, although the densest populations usually occur between 150 and 300 m. It is a pioneer species in areas that have been scoured by icebergs, and thus its presence may be considered an indicator of recent colonisation.

机译：海绵是许多南极社区中主要的无脊椎动物，由于它们的丰富和大尺寸，海绵发挥了决定性的结构功能。但是，即使在诸如分类学等基本方面方面，目前对南极海绵的了解仍然很薄。在这里，我们报道了一种南极的Stylocordyla属物种，由于其针形和生长习性的相似性，长期以来一直以北方的S.borealis的名字进行记录。迄今为止，对韦德尔海东部地区唯一已知的Stylocordyla物种的密集种群进行了透彻的研究，并重新检查了北方链球菌的几个标本（包括典型物质），这使我们能够评估变异性并确认南方的物种不是北方链球菌（Loven，1868年），而是一种新的戟花（Stylocordyla），与南部纬度记录的其他同类动物不同。新物种S. chupachups通常栖息在韦德尔海陆架的水平或略微倾斜的硬质海底，深度从100 m到400 m以下，尽管最密集的种群通常发生在150至300 m之间。它是在被冰山冲刷的地区的先驱物种，因此它的存在可能被认为是近期殖民化的标志。

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《Polar biology》 |2011年第2期|p.243-255|共13页
作者
Maria-J. Uriz; Josep-Maria Gili; Covadonga Orejas; Alida-R. Perez-Porro;
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Centre d'Estudis Avancats de Blanes CEAB-CSIC, Acces Cala St. Francesc, 14, 17300 Blanes (Girona), Spain;

Institut de Ciencies del Mar (ICM-CSIC), Passeig Maritim de la Barceloneta 37-49, 08003 Barcelona, Spain;

Institut de Ciencies del Mar (ICM-CSIC), Passeig Maritim de la Barceloneta 37-49, 08003 Barcelona, Spain;

Centre d'Estudis Avancats de Blanes CEAB-CSIC, Acces Cala St. Francesc, 14, 17300 Blanes (Girona), Spain;

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正文语种 eng
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porifera; hadromerida; cryptic species; bipolar distributions;

机译：rif鸭er科神秘物种双极分布;

Do bipolar distributions exist in marine sponges? Stylocordyla chupachups sp. nv. (Porifera: Hadromerida) from the Weddell Sea (Antarctic), previously reported as S. borealis (Loven, 1868)

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