To explore the phylogenetic relationships of the subfamily Centrotinae from the mitochondrial genome data, four complete mitogenomes (Anchon lineatus, Anchon yunnanensis, Gargara genistae and Tricentrus longivalvulatus) were sequenced and analyzed. All the newly sequenced mitogenomes contain 37 genes. Among the 13 protein-coding genes (PCGs) of the Centrotinae mitogenomes, a sliding window analysis and the ratio of Ka/Ks suggest that atp8 is a relatively fast evolving gene, while cox1 is the slowest. All PCGs start with ATN, except for nad5 (start with TTG), and stop with TAA or the incomplete stop codon T, except for nad2 and cytb (terminate with TAG). All tRNAs can fold into the typical cloverleaf secondary structure, except for trnS1, which lacks the dihydrouridine (DHU) arm. The BI and ML phylogenetic analyses of concatenated alignments of 13 mitochondrial PCGs among the major lineages produce a well-resolved framework. Phylogenetic analyses show that Membracoidea, Smiliinae and Centrotinae, together with tribes Centrotypini and Leptobelini are recovered as well-supported monophyletic groups. The tribe Gargarini (sensu Wallace et al.) and its monophyly are supported.

Stictocephala bisonia Kopp et Yonke, 1977, an invasive alien species colonizing Taibai County, Shaanxi Province, China, belongs to the subfamily Smiliinae. The total mitogenome sequence size is 15,803 bp in length, consists of 13 protein-coding genes, 22 transfer RNA genes, two ribosomal RNA genes and one control region, and shows a positive AT skew. Phylogenetic analysis results strongly support that treehoppers (Membracidae and Aetalionidae) are monophyletic, and indicate that Smiliinae could be proposed as a separate family.