瘿螨总科隶属于蜱螨亚纲、真螨总目。瘿螨总科存在四套有争议的分类系统，归因于形态学上祖征和衍征的确立主观因素较强，未考虑同形进化等因素对系统发育的影响，四套分类系统都缺乏足够的系统发育证据。线粒体基因组被广泛证实能够解决高级阶元的系统发育关系，我们近期研究发现，瘿螨总科线粒体基因组呈现出节肢动物少有的基因高度重排和高比例的非典型tRNA二级结构，这些特征被认为在高级分类阶元上具有保守性，可提供更多可靠的祖征。本研究将对瘿螨总科中涵盖所有科、亚科和族的代表性种类（60-80种）进行线粒体基因组扩增，利用线粒体基因组分子序列构建系统发育树，分析各个高级阶元之间的系统发育关系，进一步讨论形态祖征和衍征，结合各个类群的基因排序和非典型tRNA二级结构特征，在高级分类单元上重新构建/修订瘿螨总科分类系统。整个研究结果将为瘿螨总科分类系统的修订提供有力的分子系统发育证据。

The Eriophyoidea traditionally belong to the superorder Acariformes in the Acari. Four controversial taxonomic system of Eriophyoidea were present, due to morphological plesiomorphies and apomorphies were erected lacking phylogenetic evidence and were not considered the effect of homoplasy. Mitochondrial genomes were widely used at high level phylogeny of arthropods. Recently, we have sequenced complete mt genomes of eriophyoid mites, representing new gene arrangement patterns and distinct tRNA secondary structures. Gene arrangement and atypical tRNAs were thought conserved within lineages and can provide more phylogenetic evidence. We will sequence the mt genome of eriophyoid mites and construct phylogenetic trees based on the mt nucleotide sequence. Combining morphological characters, gene arrangement patterns and atypical tRNAs secondary structures, together with phylogenetic trees to reconstruct the high level taxonomic system of the Eriophyoidea. The significance of the project is providing robust phylogenetic evidence in the Eriophyoidea taxonomic system.