biostudies-literatureUnknown11(3)Chang X<i>Haemadipsa hainana</i> Song, Zhang and Tan 1977, a blood-feeding terrestrial leech, serves as an ecological indicator of habitat quality and potential mammal abundance. Currently, the molecular phylogenetic status of this species remains unclear. In this study, we presented the complete mitochondrial genome of <i>H. hainana</i> for the first time. The assembled mitochondrial genome of <i>H. hainana</i> is 15,800bp in length, comprising 13 protein-coding genes (PCGs), 22 tRNA genes, two rRNA genes and a control region. The nucleotide base content of <i>H. hainana</i> mitogenome was 34.7% A, 42.6% T, 10.7% C, and 12.0% G, indicating a notable AT base bias. Phylogenetic analysis revealed that species of <i>Haemadipsa</i> clustered into one clade, and <i>H. hainana</i> was outside the subclMitochondrial DNA. Part B, Resources329-334https://www.ebi.ac.uk/biostudies/studies/S-EPMC12862844biostudies-literatureMitochondrial genome evaluation and implications for phylogenetic relationships of <i>Haemadipsa hainana</i> song, Zhang and Tan 1977 (Arhynchobdellida: Haemadipsidae).PMC12862844Liu JShi LZhang ZZeng LTian YJin PZang EChang XfalseMitochondrial genome evaluation and implications for phylogenetic relationships of <i>Haemadipsa hainana</i> song, Zhang and Tan 1977 (Arhynchobdellida: Haemadipsidae).<i>Haemadipsa hainana</i> Song, Zhang and Tan 1977, a blood-feeding terrestrial leech, serves as an ecological indicator of habitat quality and potential mammal abundance. Currently, the molecular phylogenetic status of this species remains unclear. In this study, we presented the complete mitochondrial genome of <i>H. hainana</i> for the first time. The assembled mitochondrial genome of <i>H. hainana</i> is 15,800bp in length, comprising 13 protein-coding genes (PCGs), 22 tRNA genes, two rRNA genes and a control region. The nucleotide base content of <i>H. hainana</i> mitogenome was 34.7% A, 42.6% T, 10.7% C, and 12.0% G, indicating a notable AT base bias. Phylogenetic analysis revealed that species of <i>Haemadipsa</i> clustered into one clade, and <i>H. hainana</i> was outside the subcl2026-01-01T00:00:00Z20262026-06-27T03:12:48.681Z2026-06-27T03:05:36.336ZS-EPMC128628444163570910.1080/23802359.2026.2621504