A new species of Zanclea (Cnidaria: Hydrozoa) associated with scleractinian corals from Okinawa, Japan.
A new species of Zanclea (Cnidaria: Hydrozoa) associated with scleractinian corals from Okinawa, Japan.
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Zanclea 的一个新种（刺胞动物门：水螅纲）与日本冲绳的石珊瑚有关。
DOI：
10.1017/s0025315411001238
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Hirose E
中科院分区：
文献类型：
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作者：
Hirose M;Hirose E
记述采自日本西南部琉球群岛冲绳本岛的一新种Zanclea sango sp. nov.。新的水螅虫物种与至少三种石珊瑚（Pavona divaricata，P. venosa和Psammocora contigua）有关。赞克藻Zancleasangosp. nov.是一种多形水螅体，水螅根生长于珊瑚骨骼和成钙细胞外胚层之间。水螅茎和水螅根被外弧突包围。新释放的水母几乎是球形的，有四个perradial包括stenoteles的伞形外囊袋，和两个长的边缘触角与cnidophores包含macrobasic euryteles。新种Zanclea sango sp. nov.与Zanclea gilii Boero et al.近缘，2000和Zanclea margaritae Pantos & Bythell，2010，但它的区别在于其cnidome，在水螅根周围存在周弧，以及较低的宿主特异性。根据一个假设的Zanclea系统发生学，Zanclea的祖先种与一些底栖生物，如藻类或双壳类，有一个机会的协会，其水螅根被一个perisarc覆盖。后来，一些物种与底栖动物建立了特定的联系，之后水螅根失去了外弧，直接被宿主组织覆盖。在Zanclea栖息的珊瑚，本物种，与多个珊瑚宿主物种和周围的水螅根的perisarc，似乎保留更多的祖先的性格状态比Z。gilii和Z. margaritae，其具有特定的珊瑚宿主物种，并且在水螅根周围没有外弧。
The new species of Zanclea sango sp. nov. is described from Okinawajima Island, Ryukyu Archipelago, south-western Japan. The new hydrozoan species is associated with at least three scleractinian corals (Pavona divaricata, P. venosa and Psammocora contigua). Zanclea sango sp. nov. is a polymorphic hydroid and the hydrorhiza grows between the coral skeleton and calicoblastic ectoderm. The hydrocaulus and hydrorhiza are surrounded by perisarc. Newly released medusae are almost spherical, with four perradial exumbrellar nematocyst pouches including stenoteles, and two long marginal tentacles with cnidophores containing macrobasic euryteles. Zanclea sango sp. nov. is allied to Zanclea gilii Boero et al., 2000 and Zanclea margaritae Pantos & Bythell, 2010, but it is distinguished by its cnidome, the presence of a perisarc around hydrorhiza, and lower host-specificity. According to a hypothetical Zanclea phylogeny, the ancestral species of Zanclea had an opportunistic association with some benthic organisms, such as algae or bivalves, and its hydrorhiza was covered by a perisarc. Later, some species established specific associations with benthic animals, after which the hydrorhiza lost the perisarc and became directly covered with host tissue. Among Zanclea inhabiting corals, the present species, with multiple coral host species and a perisarc around the hydrorhiza, seems to retain more ancestral character states than Z. gilii and Z. margaritae, which have specific coral host species and no perisarc around the hydrorhiza.