实验十六 土壤亚系统无脊椎动物多样性的调查及测定

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1、实验十六土壤亚系统无脊椎动物群落的多样性附录主要土壤动物类群的多样性及其检索Ⅰ．主要土壤动物类群分门、纲检索表1．单细胞动物··················································································原生动物门Protozoa多细胞动物·················································································································22．明显分为头、足和内脏囊3部分，具外

2、套膜；足部发达、扁平，位于身体腹面；大多数种类具有1螺旋形贝壳···············软体动物门Mollusca，腹足纲Gastropoda身体不具以上特征······································································································33．无足···········································································································

3、··················4有足···························································································································104．无头·····························································································································5有头·················

4、·····························节肢动物门Arthropoda，昆虫纲Insecta（部分）5．无体节·························································································································6具体节··········································································································

5、···············76．体前端扩大成半月形头瓣···············扁形动物门Plathelminthes，涡虫纲Turbellaria体前端不扩大··············································································线虫动物门Nematha7．体节较多··················································································环节动物门Annelida8体节较少···············

6、······································································································98．身体前、后端各有一个吸盘；身体扁平或呈圆柱形·························蛭纲Hirudinea无吸盘；身体呈细长圆柱形·························································寡毛纲Oligochaeta9．体长1mm以下；头前端具轮盘，其上有1、2圈纤毛···········轮形动物门Rotifer

7、a体长1mm以上，头不具轮盘·······················节肢动物门，昆虫纲Insecta（部分）10．足4对，无节，爪4个以上·················································缓步动物门Tardigrada足一般不为4对；若为4对，则足有节，爪1~3个·········节肢动物门（部分）1111．大多数体节每体节各有两对足···································