Secondly, the phylogenetic trees obviously point out the evolutionary position of Insecta adjacent to Crustacea, and the members of Crustacea are divided into two clades with the other branch closed to Diplopoda. 其次,种系进化树明显地指出昆虫纲与甲壳纲亲缘关系近,甲壳纲分为两大分支,另外一支靠近倍足纲。