Complete mitochondrial genome sequence of Labriocimbex sinicus, a new genus and new species of Cimbicidae (Hymenoptera) from China

Labriocimbex
sinicus Yan & Wei gen. et sp. nov. of Cimbicidae is described. The
new genus is similar to Praia Andre and Trichiosoma
Leach. A key to extant Holarctic
genera of Cimbicidae is
provided. To identify the phylogenetic placement of Cimbicidae, the
mitochondrial genome of L. sinicus
was annotated and characterized using
high-throughput sequencing data. The complete mitochondrial genome of L. sinicus was obtained
with a length of 15,405 bp and a typical set of 37 genes (22 tRNAs, 13 PCGs, and two rRNAs). The results demonstrated that all
PCGs were initiated by ATN codon,
and ended with TAA or T stop codons. Remarkably, the secondary
structures of the rrnS and rrnL of L. sinicus were much different from those of Corynis lateralis. Phylogenetic analyses verified the monophyly and
positions of the three Cimbicidae species within the superfamily
Tenthredinoidea and demonstrated a relationship as (Tenthredinidae +
Cimbicidae) + (Argidae + Pergidae) with strong nodal supports. Furthermore, we
found that the generic relationships of Cimbicidae revealed by the phylogenetic
analyses based on COI genes agree
quite closely with the systematic arrangement of the genera based on the morphological
characters. Phylogenetic tree based on two methods shows that L. sinicus is the sister group of Praia with high support values. We suggest that Labriocimbex
belongs
to the tribe Trichiosomini of Cimbicinae
based on adult morphology and molecular data.