Complete mitochondrial genome and phylogenetic analysis of Cyathostomum tetracanthum (Rhabditida: Cyathostominae).

The complete mitochondrial genome sequence of Cyathostomum tetracanthum was sequenced in the present study. It was determined to be 13,839 bp bases. The overall base composition was 30.93% A, 45.75% T, 6.97% C, and 16.35% G, with a very strong A + T bias (76.65%). The nucleotide sequence data of 12 protein-coding genes of C. tetracanthum and other 16 Strongylidae species were used for phylogenetic analyses. Cyathostomum tetracanthum was closely related with Cylicocyclus species rather than other Cyathostomum species. The complete mitogenome will facilitate taxonomy and systematics studies of Cyathostominae nematodes.