Phylogenetic relationships of five species of Dorippinae(Crustacea, Decapoda) revealed by 16S rDNA sequence analysis

A molecular phytogeny is presented for the subfamily Dorippinae(including 9 individuals,representing 5 species and 4 genera),based on the sequence data from 16S rRNA gene.Two-cluster test between lineages in these phylogenetic trees has been performed.On the basis of rate constancy,the rate of nucleotide substitutions of 16S rDNA sequence data is estimated as 0.27% per million years.The analysis strongly supports the recognition of the Dorippinae as a monophyletic subfamily.Phylogenetic tree indicates that the subfamily Dorippinae is divided into two main clades,and genus Dorippe appears basal in the subfamily,diverging from other species 36.6 Ma ago.It is also clear that the Heikea is closely related to the genus Neodorippe.The divergence time between them is 15.8 Ma.