Nov . . the phylogenetic systematic analysis of these gammarus species was studied in the present paper . based on an analysis by paup * 4 . 0 ( phylogenetic analysis using parsimony * and other methods version 4 . 0 ) and macclade 4 . 0 , we presumed that g . lacustris is more primitive compared to the others 论文引言和概述部分通过详细总结淡水钩虾的形态特征、分类系统、生态学与生物学以及经济价值与利用等方面的研究结果，对淡水钩虾的分类依据、分类地位、栖息环境以及生活史等方面作了较为详尽的介绍。
