台湾海峡南部水螅水母纲两新种形态特征  

Specific characteristic of two new species of Hydromedusae in the south of Taiwan Strait

作　　者：黄加祺[1] 许振祖[1] 郭东晖[1,2] 

机构地区：[1]厦门大学海洋与环境学院,福建厦门361005 [2]厦门大学近海海洋环境科学国家重点实验室,福建厦门361005

出　　处：《台湾海峡》2010年第1期1-4,共4页Journal of Oceanography In Taiwan Strait

基　　金：国家自然科学基金重点资助项目(40331004)

摘　　要：2005年7月在台湾海峡南部发现花水母亚纲(Anthomedusae Haeckel,1879)筒螅水母科(Tu-bulariidae Fleming,1828)刺泳水母属(Plotocnide Wagner,1885)1个新种——台湾刺泳水母(Plotoc-nide taiwanensis sp.nov.)和软水母亚纲(Leptomedusae Haeckel,1866)和平水母科(EirenidaeHaeck-el,1879)伊能水母属(Irenium Haeckel,1879)1个新种——多手伊能水母(Irenium polynenum sp.nov.).In this paper, two samples of Hydromedusae were collected by the boat ＂Yanping Ⅱ＂ in the south of Taiwan Strait （21°40′ - 23°38′N, 116°47′ - 118°56′E） in July 2005. On the analysis of 75 Hydromedusae samples, two new species i. e. Plotocnide taiwanensis sp. nov. and Irenium polynemum sp. nov. are described. All type specimens are deposited in the College of Oceanography and Environmental Science, Xiamen University. Plotocnide taiwanensis sp. nov. （Fig. 1 ） without pointed apical projection; with scattered nematoeysts on exumbrella;without a gastric peduncle ;with 4 equally developed, solid tentacles;each with a large terminal knob of nematocysts. Placing this medusa in the genus Plotocnide Wagner, 1885E1J. [1 -93 Presently, only one valid species in the Plotocnide Wagner, 1885 i. e. P. borealis Wagner, 1885 is known.P. borealis, rather thick umbrella wall, with a broad, dome-shaped apical chamber lined by large, vacuolated endoderm cells, with 4 thin radial canals. This species distributes in arctic or subarctic seas. New species with thin umbrella wall; without apical chamber;manubrium very large, with vacuolated endoderm cells scattered in upper part of manubrium; with 4 rather rough radial canals of granular materials;with 4 rather short marginal tentacles with circular cnidocysts and each with a large terminal knob of nematocysts. So it differs from P. borealis Wagner, 1885.P. borealis, rather thick umbrella wall, with a broad, dome-shaped apical chamber lined by large, vacuolated endoderm cells, with 4 thin radial canals. This species distributes in arctic or subarctic seas. New species with thin umbrella wall; without apical chamber;manubrium very large, with vacuolated endoderm cells scattered in upper part of manubrium; with 4 rather rough radial canals of granular materials;with 4 rather short marginal tentacles with circular cnidocysts and each with a large terminal knob of nematocysts. So it differs from P. borealis Wagner, 1885. Irenium polynemum sp. nov. （ Fig. 2 ） h

关 键 词：海洋生物学 水螅水母纲 分类 新种 台湾海峡 

分 类 号：P735[天文地球—海洋生物学]