| the phylogeny and taxonomy of austral monodontine topshells (mollusca: gastropoda: trochidae), inferred from dna sequences. | the systematics of topshells (family trochidae) is currently unresolved: at present even the generic boundaries within this group are poorly defined. in this study, we used sequence data of two mitochondrial genes (16s and cytochrome oxidase 1, coi) and one nuclear gene (actin) to resolve the phylogeny of a closely related subgroup of the trochidae, 30 species of largely southern hemisphere monodontine topshells. the phylogenies constructed revealed five well-supported generic clades: a south af ... | 2005 | 15936215 |