Abstract
The complete nucleotide sequences of the mt genome from the firefly, Pyrococelia rufa (Coeleoptera: Lampyridae) was determined. The circular genome is 17,739-bp long, and contains a typical gene complement, order, and arrangement identical to Drosophila yacuba. The presence of 1724-bp long intergenic spacer in the P. rufa mt genome is unique. The putative initiation codon for ND1 gene appears to be TTG, instead of frequently found ATN. All tRNAs showed stable canonical clover-leaf structure of other mt tRNAs, except for tRNASer (AGN), DHU arm of which could not form stable stem-loop structure. Phylogenetic analysis among insect orders confirmed a monophyletic Endopterygota, a monophyletic Mecopterida, a monophyletic Diptera, a monophyletic Lepidoptera, and a monophyletic Coleoptera, suggesting that the complete insect mt genome sequence has a resolving power in the diversification events within Endopterygota. However, internal relationships among three coleopteran species are not clear, and the inclusion of some insect orders (i.e., apterygotan T. gertschi) in the analysis provided inconsistent results compared to other molecular studies.
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