Standard guide for conducting sediment toxicity tests with marine and estuarine polychaetous annelids 用海洋和港湾多毛纲环节动物作沉积物毒性试验的标准导则
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Standard guide for conducting acute , chronic , and life - cycle aquatic toxicity tests with polychaetous annelids 用多毛纲环节动物做剧烈的慢性的及寿命周期水生动物毒性试验的标准指南
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In the p5 to p7 phases , most shrimp settle into life on the bottom or sides of the pond , they need only annelida and nematoda . at this time , 一般稚虾在p5 p7就开始进入底栖生活或倚壁生活，而嗜食环节动物annelida及圆形动物nematoda等小型底栖动物。
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As we all know , bilateral symmetry , three - layer embryo , metamerism and having a relatively developed head are the common characteristics of the arthropoda and annelida , so it is believed that arthropod originated from annelid 由于节肢动物具备环节动物两侧对称、三胚层、身体分节、头部较发达等特征，所以一般认为节肢动物起源于环节动物或类似环节动物的祖先。
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But as a matter of fact , athropoda has some more complex characteristics than annelida , such as the exoskeleton , departmental body - plan and segmented appendages , which , as one parameter , results in the abundance of arthropod fossils in the chengjiang fossil lagerstatte 但节肢动物还具有比环节动物更高级的特征，如：身体分部、附肢分节；循环、生殖、排泄等系统均较环节动物复杂高级，这可能是澄江化石库中节肢动物种数丰富的一个很重要的原因。
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Using the calculation method of the tolerance value provided by lenat ( 1993 ) , eighty - one tolerance values of macro - invertebrate taxa were acquired . among them , two genera in 2 families in coleoptera , 2 genera inl family in megaloptera , 14 genera in 7 families in ephemeroptera , 2 genera in 2 families in plecoptera , 6 genera in 5 familes in trichoptera , 1 geneus and 3 families in odonata , 12 genera and 3 sub - families in 3 families in diptera , 5 species in 2 genera in mollusca , 4 species in 1 genus in annipula and others 1 geneus 其中，依据lenat计算耐污值的方法，确定了81个分类单元的耐污值，包括鞘翅目3科2属，广翅目1科2属，蚌游目7科14属，精翅目2科2属，毛翅目6科7属，靖蜒目3科1属， t翅目3科3亚科12属，软体动物2属5种，环节动物1属4种，扁形动物1属。
