nemertean

1. Therefore, this nemertean is defined as Dendrorhynchus zhejiang and its detailed classification needs further research.
   暂定该纽虫为浙江枝吻纽虫，详细的分类地位还需进一步的研究。
2. The trend of body weight changes in diluted media indicated that this nemertean is a volume regulator.
   扁额原细首纽虫在低盐介质中的体重变化表明了它能够根据环境的渗透压变化进行体积调节。

noun

1. soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract

   Synonym:    ribbon wormnemertineproboscis worm