Phylogenetic positions of some genera and species of the family Buccinidae (Gastropoda: Mollusca) from China based on ribosomal RNA and COI sequences

Molecular phylogeny suggests synonymy of Sandalia bridgesi Lorenz, 2009 with S. triticea (Lamarck, 1810) (Gastropoda, Ovulidae)

The Ovulidae (Gastropoda, Cypraeoidea) is a family of small to medium Mollusca in the order Littorinimorpha, and Sandalia is a very small genus containing only three extant species. In the present study, 132 specimens of Ovulidae were collected, belonging to seven genera and nine species, including 54 Sandaliabridgesi and three Sandaliatriticea individuals. The cytochrome c oxidase I gene, 16S rRNA, and ITS1-5.8S-ITS2 sequences were obtained from all specimens and compared with sequences downloaded from GenBank to calculate genetic distances and construct phylogenetic trees. The sequences of S.bridgesi and S.triticea exhibited a high degree of similarity, and S.bridgesi does not form a separate clade, supporting the proposal that S.bridgesi should be synonymised with S.triticea.

Complete mitochondrial genome of Volutharpa perryi (Neogastropoda: Buccinidae)

In this study, the complete mitochondrial genome of Volutharpa perryi has been determined for the first time. The mitogenome is of 15 255 bp in length, including 13 protein-coding genes, two ribosomal RNA genes and 22 transfer RNA genes. The overall base composition is 29.6%, 38.6%, 15.6% and 16.2% for A, T, C and G, respectively. The 13 PCGs of V. perryi and other 12 mollusk species were used for phylogenetic analysis by maximum-likelihood method, and the phylogenetic tree demonstrated the close relationship of V. perryi to species of Buccinoidea. The results are expected to provide useful molecular data for species identification and further phylogenetic studies of genus Volutharpa.