一篇关于六放珊瑚演变发展的文章,确认了一个全新的属,一种新的物种Hydrozoanthus,一个伴生种-Aenigmanthus segoi(后文暂称艾尼格珊瑚)。在我们的海缸中,我们主要关注浅水、光合作用的花群海葵,沙群海葵,还有他们的亲缘动物——它们在全世界有各种各样不同生长形式。

其中最常见的一种是所谓的“体外寄生动物”,也就是说这些动物生长在其他生物之上,尤其是柳珊瑚和水螅虫。新发现的Hydrozoanthus是六放珊瑚中类似的一个例子,它必须像水螅虫那样生长在羽毛状结构(的珊瑚)上。当被水螅虫完全包裹,红色小体型的Hydrozoanthus看起来更像柳珊瑚的一个部分而不像六放珊瑚。

 

艾尼格的特写,一个六放珊瑚的新物种

 

还有另外一类寄生六放珊瑚,可以在其他海生动物的结构(区别于之前提到的羽毛状结构)上生长,但他们也没必要这么做。而且,其中一些还会在息肉之间堆积沙粒和其他颗粒,从而使杂乱生长的枝看起来很“邋遢”,就像新物种艾尼格那样。

这个新属和新物种由Hiroki,Takahiro和Remer在最新期的Molecular Phylogenetics & Evolution(译做分子系统发育与进化,是出版于美国西部的进化生物学期刊)中阐述。

 

原文:

A new paper on the phylogeny and the evolution of zoanthid growing forms has identified a new species of Hydrozoanthus, and a completely new genus and accompanying species calledAenigmanthus segoi. While in the aquarium hobby we are mostly focused with the shallow water, photosynthetic Zoanthus, Palythoa and their relatives there’s a whole world of zoanthids with a wide range of different growth forms.

One of the most common of these is what’s called ‘epizootic’ meaning simply that these zoanthids grow on top of other creatures, notably gorgonians and especially hydroids. The newly described Hydrozoanthus sils is an example of a zoanthid that has to grow on the structure created by feather like hydroids. When the hydroid is fully encrusted the small polyped red bodied Hydrozoanthus sils looks more like a gorgonian than a zoanthid.

A clsoe up view of Aenigmanthus segoi, a new genus and new species of zoanthid.

Another group of epizootic zoanthids can grow on the structure created by other marine life but they don’t have to. Furthermore, some of these will accumulate sand grains and other particles between the polyps giving the overgrown branches a ‘dirty’ appearance as is the case with the new genus & species Aenigmanthus segoi.

The new species and new genus are described by Hiroki, Takahiro & Reimer in the newest edition of Molecular Phylogenetics & Evolution.