The complete mitochondrial genome and phylogenetic analysis of a leaf insect <i>Cryptophyllium oyae</i> Cumming &amp; Le Tirant, 2020 (Phasmatodea: Phylliidae) in China

Stick insects have evolved remarkable camouflage adaptations, but their geographical distribution and phylogeny remain insufficiently understood. In this study, we confirmed the presence of <i>Cryptophyllium oyae</i> Cumming and Le Tirant in China, and presented its complete mitochondrial genome (16,820 bp) for the first time. The genome consists of 13 protein-coding genes, 22 transfer RNA genes, two ribosomal RNA genes, and a control region. Additionally, a phylogenetic tree using mitochondrial genomes from 51 Phasmatodea species confirmed <i>C. oyae</i> belongs to the Phylliidae clade. This study enhances taxonomic identification and provides insights for phylogenetic analysis and conservation of Phasmatodea species in future studies.

竹节虫（䗛目 Phasmatodea）已演化出卓越的伪装适应策略，但其地理分布与系统发育关系仍未得到充分阐明。本研究证实了隐叶䗛*Cryptophyllium oyae* Cumming及Le Tirant在中国的分布，并首次发布了其完整线粒体基因组（16820 bp）。该线粒体基因组包含13个蛋白质编码基因、22个转运RNA基因、2个核糖体RNA基因以及一个控制区。此外，本研究利用51种䗛目昆虫的线粒体基因组构建系统发育树，证实*C. oyae*隶属于叶䗛科（Phylliidae）演化支。本研究完善了䗛目昆虫的分类鉴定工作，并为后续研究中的系统发育分析与物种保护提供了重要参考。