MOLECULAR PHYLOGENY OF MAJOR OSTRACODE GROUPS BASED ON 18S rDNA SEQUENCES DATA: A PRELIMINARY STUDY
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Abstract:
We studied the phylogenetic relationships of 29 genera of 21 families using 18SrDNA partial sequences. Maximum parsimony (MP), maximum likelihood (ML) and neighbor joining (NJ) analyses combined with fossil records and morphological characters of Ostracoda were used to discuss the phylogenetic relationships among different lineages of ostracodes. Our results show that Podocopida, Myodocopida, superfamily Cypridinacea are monophyletic in all trees, whereas superfamily Bairdiacea is not. The monophyly of Myodocopida and Podocopida are strongly supported by molecular data. Our study also suggests that evolutionary radiation possibly occurred many times at different taxonomic levels of Ostracoda in history.
