水螅
生物
DNA条形码
细胞色素c氧化酶亚单位Ⅰ
动物
水生生物(植物学)
分类学(生物学)
线粒体DNA
分子系统发育学
系统发育学
生态学
蛇床子属
基因
植物
遗传学
珊瑚
作者
Konglin Zhou,Lianming Zheng,Jinru He,Yan Lin,Wenqing Cao,Wenjing Zhang
出处
期刊:Journal of the Marine Biological Association of the United Kingdom
[Cambridge University Press]
日期:2013-08-07
卷期号:93 (8): 2075-2088
被引量:10
标识
DOI:10.1017/s0025315413000969
摘要
The genus Clytia is distributed worldwide, but most accepted species in this genus have been examined either only at the hydroid or medusa stage. The challenge in identifying Clytia species reflects their complex life cycles and phenotypic plasticity. In this study, molecular and morphological investigations of Clytia specimens from the coastal waters of China revealed an as yet unreported species, designated C. xiamenensis sp. nov., that was considered as conspecific to two nearly cosmopolitan species, C. hemisphaerica and C. gracilis . DNA barcoding based on partial mitochondrial cytochrome c oxidase subunit I (COI) and large subunit ribosomal RNA gene (16S) confirmed the highly distinct lineage of C. xiamenensis sp. nov. These results were corroborated by the detailed observations of its mature medusae and its colonies, which showed that C. xiamenensis sp. nov. was morphologically distinct from other species of Clytia . Thus, based on our findings, the nearly cosmopolitan distribution attributed to some species of Clytia might rather be due to the misidentification, and it is necessary to elucidate their whole life cycle in order to establish the systematic validity of all species within the genus Clytia .
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