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首页> 外文期刊>Russian journal of marine biology >Larval Development of Nemerteans of the Genus Quasitetrastemma (Nemertea: Monostilifera)
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Larval Development of Nemerteans of the Genus Quasitetrastemma (Nemertea: Monostilifera)

机译:类拟南芥属Nemerteans的幼体发育(Nemertea:Monostilifera)

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摘要

Data on the larval development of Quasitetrastemma stimpsoni and Q. nigrifrons are presented. In both species, fertilization is external; the development passes through a free-swimming larval stage, the "hidden larva." The larva has three pairs of eyes. After settling, the eyes of the second pair fuse with eyes of the first pair or are completely reduced. The basis and stylets are formed in 7-8 days after fertilization. Larvae of Q. stimpsoni settle on day 9-10 after fertilization; and Q. nigrifrons, on day 7-8.
机译:提出了关于拟定四棱茎和Q. nigrifrons幼虫发育的数据。在这两个物种中,受精都是外在的。该开发过程经历了一个自由游动的幼虫阶段,即“隐藏的幼虫”。幼虫有三双眼睛。稳定后,第二对眼睛与第一对眼睛融合或完全消失。受精后7-8天形成基础和管心。受精后Q. stimpsoni的幼虫定居在第9-10天。和Q. nigrifrons,在第7-8天。

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