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首页> 外文期刊>Zoological Science >A New Species of Green Hydra (Hydrozoa: Hydrida) from China
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A New Species of Green Hydra (Hydrozoa: Hydrida) from China

机译：来自中国的一种新的绿色九头蛇（Hydrozoa：Hydrida）

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A new species of green freshwater hydra (Cnidaria, Hydrozoa: Hydrida), Hydra sinensis, is described from Guangdong Province, China. The chief distinction between H. sinensis sp. nov. and three other green hydras (H. hadleyi, H. viridissima, and H. plagiodesmica) is in the holotrichous isorhizae. Hydra sinensis sp. nov. differs from H. plagiodesmica in the shape of the holotrichous isorhizae, and from H. viridissima and H. hadleyi in the tubule of the capsule of the holotrichous isorhizae. The capsule tubule coils two times in 86% and three times in 14% of holotrichous isorhizae (n=50) in H. sinensis sp. nov.; we observed no tubules coiling four times. In contrast, the capsule tubule coils three or four times in H. viridissima and H. hadleyi, and no tubules coiling two times have been reported. In addition, holotrichous isorhizae, which are mainly located around the hypostome, are sparse in the tentacles of H. sinensis sp. nov., whereas the majority of holotrichous isorhizae is located on the tentacles in most other hydras. A molecular phylogenetic analysis using the nuclear small subunit (18S) ribosomal RNA gene indicated a close relationship between H. sinensis and H. viridissima. Hydra viridissima did not group within a clade of four individuals of H. sinensis, indicating a possible sister-species relationship between the two species. Morphological characters in combination with the molecular phylogenetic evidence support Hydra sinensis as a new species.
机译：从中国广东省描述了一种新的绿色淡水水hydr（Cnidaria，Hydrozoa：Hydrida），Hydra sinensis。 H. sinensis sp。之间的主要区别。十一月以及其他三个绿色水蛇（H. hadleyi，H。viridissima和H. plagiodesmica）在全恶臭的异绒毛中。九头蛇十一月在全恶性异寿虫的形状上与斜纹螺旋藻不同，在全恶性异寿虫的胶囊的小管中不同于H. viridissima和H. hadleyi。荚膜小管在中华绒螯蟹中的全异虫异种（n = 50）中的86％缠绕了两倍，在14％中缠绕了三倍。十一月我们观察到没有小管盘绕四次。相比之下，荚膜小管在H. viridissima和H. hadleyi中盘旋三到四次，没有小管盘旋两次的报道。此外，在H. sinensis sp。的触角中，主要分布在下垂体附近的全异性异端线虫。十一月，而大多数全异兽异种位于大多数其他水仙中的触手上。使用核小亚基（18S）核糖体RNA基因进行的分子系统发育分析表明，中华绒螯蟹和绿色拟南芥之间存在密切的关系。九头蛇没有归类为中华绒螯蟹的四个个体，这表明这两个物种之间可能存在姐妹物种关系。形态学特征与分子系统学证据相结合，支持九头蛇作为新物种。

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