摘要 : An evaluation of the taxonomic status and phylogenetic position of the monotypic genus <i>Urocarpidium</i> Ulbr. (Malvaceae) was undertaken using DNA sequence data. Nuclear (ITS 1 and 2) and plastid (<i>ndhF</i>, <i>rpl16</i> intr... 展开 An evaluation of the taxonomic status and phylogenetic position of the monotypic genus <i>Urocarpidium</i> Ulbr. (Malvaceae) was undertaken using DNA sequence data. Nuclear (ITS 1 and 2) and plastid (<i>ndhF</i>, <i>rpl16</i> intron, 3' <i>matK-trnK</i> intron) sequence data were used to reconstruct independent phylogenies for related genera of tribe Malveae, to which <i>Urocarpidium</i> belongs. The nuclear and plastid phylogenies indicate that <i>Urocarpidium albiflorum</i> is not synonymous with <i>Tarasa operculata</i> as previously suggested, consistent with earlier phylogenetic studies. Instead, this species is more closely related to <i>Fuertesimalva</i> and <i>Palaua</i>, although its position relative to these two genera differs in the nuclear and plastid trees. Given the unresolved phylogenetic position and unique suite of morphological characters, <i>Urocarpidium</i> is maintained as a monotypic genus. Full synonymy for <i>Urocarpidium albiflorum</i> is also provided. 收起