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Morphology and molecular analyses of a new Clytia species (Cnidaria: Hydrozoa: Campanulariidae) from the East China Sea

Published online by Cambridge University Press:  27 June 2014

Jinru He ,
Lianming Zheng ,
Wenjing Zhang ,
Yuanshao Lin  and
Wenqing Cao
Jinru He
Affiliation:
Marine Biodiversity and Global Change Research Center, Xiamen University, Xiamen 361102, China
Lianming Zheng*
Affiliation:
Marine Biodiversity and Global Change Research Center, Xiamen University, Xiamen 361102, China Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies (CEES), Xiamen University, Xiamen 361102, China College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
Wenjing Zhang
Affiliation:
Marine Biodiversity and Global Change Research Center, Xiamen University, Xiamen 361102, China Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies (CEES), Xiamen University, Xiamen 361102, China
Yuanshao Lin
Affiliation:
Marine Biodiversity and Global Change Research Center, Xiamen University, Xiamen 361102, China Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies (CEES), Xiamen University, Xiamen 361102, China
Wenqing Cao
Affiliation:
Marine Biodiversity and Global Change Research Center, Xiamen University, Xiamen 361102, China Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies (CEES), Xiamen University, Xiamen 361102, China
*
Correspondence should be addressed to: L. Zheng, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China email: zhlm@xmu.edu.cn
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Abstract

The near-cosmopolitan genus Clytia is abundantly found in coastal waters, but difficulties of identification in this genus make nearly all species records of medusae suspect. Complex life histories, ambiguous taxonomic characters, and phenotypic plasticity pose serious problems for accurate species-level identifications and future revisions of Clytia species. In the present study, morphological investigations and molecular analyses of Clytia specimens from the coastal waters of the East China Sea revealed Clytia gulangensis sp. nov. as a new species. DNA barcoding based on the mitochondrial cytochrome oxidase I (COI) gene supported the new species as a separate species within Clytia, and phylogenetic analyses based on mitochondrial 16S rDNA and nuclear 18S rDNA further confirmed this new species to be a distinct lineage. Moreover, detailed observation of medusae and polyps of this species showed sufficient morphological differences from other Clytia species for a diagnosis. Our results indicated that life cycle and DNA-based studies should be a standard approach in future biodiversity investigations of Clytia species.

Keywords

Clytianew speciesmorphologymolecular analysis
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 95 , Issue 2 , March 2015 , pp. 289 - 300
Copyright
Copyright © Marine Biological Association of the United Kingdom 2014 

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