4 Conclusions
In this study, we reported the complete mitogenomes of twoProphantis species, P. octoguttalis and P. adusta ,
belonging to the tribe Trichaeini, for the first time, and analyzed
their gene size and arrangement, base composition, codon usage, and tRNA
secondary structure, etc., which were highly consistent with those of
other previously studied species of Spilomelinae. The two mitogenomes
were typical of lepidopteran insects. Combined with the published
mitogenome sequences of Crambidae, all phylogenetic trees based on the
different datasets confirmed the monophyly and position of Trichaeini
and showed satisfactorily high support values. However, its sister group
was not completely resolved, combined with previous multisite studies.
In addition, the phylogenetic relationships within Crambidae in
phylogenetic tree in our present study were in general agreement with
previous studies, whereas the affinities in the “non-PS clade” were
still unstable and require further investigation. Therefore, improving
sample coverage and combining different molecular markers, such as
mitochondrial genome and nuclear genes, should be considered in the
future research on these taxa.