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首页> 外文期刊>Journal of oceanography >On the nauplius ofCentropages yamadaiMori, copepoda
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On the nauplius ofCentropages yamadaiMori, copepoda

机译:在山dai的无节制上

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摘要

The nauplius ofC. yamadai shows the shape of typicalCentropages nauplius, as inC. hamatus andC. abdominalis. The nauplii of genusCentropages are oval in shape; somewhat rounded anteriorly and slightly pointed posteriorly. The rostrum is comparatively large. A nauplius eye is large at the proximal portion of the rostrum. There is a labrum with the minute spines on its posterior border. The antennule of 3 segments is oar-liked in outline as inCalanus, but on the ventral margin of terminal segment there is no seta. The abdominal portion is not divided from the carapace like that ofTemora orCalanus. There is no dorso-ventral flexure. The furcal setae are thick and long, and asymmetrical. An end seta which presents just dorsally against to a median seta, elongates backwards.The nauplius ofC. yamadai can be distinguished from nauplii of other species by the structure of appendages in the respective stages, but this nauplius is easily identified by the coloured body.
机译:C的无节制。 yamadai显示出典型的中生无节幼体的形状,如inC。 mat和腹肌。中肠无节幼体是椭圆形的;前部略圆,后部略尖。讲台比较大。一头无节幼体的眼睛在讲台的近端大。后唇缘有一个细刺。 3个节段的前庭轮廓像桨一样呈桨形,但在末节节的腹缘没有set毛。腹部部分不像特莫拉(Temora)或龟头(Calanus)那样与甲壳分开。没有背腹弯曲。糠set刚毛厚而长,且不对称。末端刚毛背向正中间的刚毛,向后延伸。 yamadai可以通过各个阶段的附肢结构区别于其他物种的无节幼体,但是这种无节幼体很容易被有色物体识别。

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