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Morphological and molecular characterization of Euplotes encysticus (Protozoa: Ciliophora: Euplotida)

Published online by Cambridge University Press:  02 June 2010

Xinpeng Fan
Affiliation:
Laboratory of Protozoology, Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou 510631, China Laboratory of Protozoology, KLM, Ocean University of China, Qingdao 266003, China
Jie Huang
Affiliation:
Laboratory of Protozoology, KLM, Ocean University of China, Qingdao 266003, China
Xiaofeng Lin*
Affiliation:
Laboratory of Protozoology, Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou 510631, China
Jiqiu Li
Affiliation:
Laboratory of Protozoology, Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, College of Life Science, South China Normal University, Guangzhou 510631, China
Khaled A.S. Al-Rasheid
Affiliation:
Zoology Department, King Saud University, Riyadh 11451, Saudi Arabia
Xiaozhong Hu
Affiliation:
Laboratory of Protozoology, KLM, Ocean University of China, Qingdao 266003, China
*Corresponding
Correspondence should be addressed to: X. Lin Laboratory of Protozoology, College of Life Science, South China Normal University, Guangzhou 510631, China email: xlin@scnu.edu.cn

Abstract

The ciliate Euplotes encysticus Yonezawa, 1985 was insufficiently described so far regarding its living morphology, infraciliature and silverline system. Recently, a China population was isolated from brackish water (salinity 6‰) near a coastal sandy beach (114°32′E 22°43′N) of the Daya Bay, South China Sea and subsequent investigations were performed on it in detail. Based on data available, the morphology of this species was summarized and a new diagnosis is given which is characterized by: medium-sized body with consistently 9 frontoventral, 2 caudal and 2 left marginal cirri; 30–40 adoral membranelles; 7 dorsal kineties; dorsal silverline system consisting of complex type with irregular network; capable of encystment. Both the morphology and SSr RNA gene sequence show, with high support, a close relationship of E. encysticus and Euplotes muscorum.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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