Abstract
We describe the complete mitochondrial genomes of the green lacewing species Chrysoperla nipponensis (Okamoto, 1914) and Apochrysa matsumurae Okamoto 1912 (Neuroptera: Chrysopidae). The genomes were 16,057 and 16,214 bp in size, respectively, and comprised 37 genes (13 protein coding genes, 22 tRNA genes and two rRNA genes). A major noncoding (control) region was 1,244 bp in C. nipponensis and 1,407 in A. matsumurae, and the structure was simpler than that reported in other Neuroptera, lacking conserved blocks or long tandem repeats. The overall arrangement of genes was almost the same as that found in most arthropod mitochondrial genomes, with the one exception of a tRNA rearrangement to tRNA-Cys-tRNA-Trp-tRNA-Tyr, rather than the plesiomorphic tRNA-Trp-tRNA-Cys-tRNA-Tyr. A high A + T content (78.89 and 79.02%, respectively), A + T-rich codon bias, and a mismatch between the most-used codon and its corresponding tRNA anticodon were observed as a typical feature of the insect mitochondrial genome.
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