Journal
PLANT SYSTEMATICS AND EVOLUTION
Volume 235, Issue 1-4, Pages 19-34Publisher
SPRINGER WIEN
DOI: 10.1007/s00606-002-0222-0
Keywords
Monopetalanthus; Aphanocalyx; Bikinia; Tetraberlinia; Caesalpinioideae; phylogeny; ITS; psbA-trnH; trnL
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To assess the new taxonomy of Monopetalanthus proposed by Wieringa, a phylogenetic study was performed using the chloroplast trnL intron and psbA-trnH spacer, and the nuclear ITS region of the 18-26S rDNA. The phylogeny clearly indicates the polyphyletic nature of Monopetalanthus. The molecular data support the transfer of M. longiracemosus to Tetraberlinia and the newly defined Aphanocalyx, which now includes all the previous Monopetalanthus species having leaflets with a marginal vein. Our analyses do not support the monophyly of the newly described genus Bikinia, which includes four new species and six species transferred from Monopetalanthus. Bikinia occurs either as paraphyletic with Tetraberlinia (chloroplast DNA data) or as a monophyletic group that also includes the new monotypic genus Icuria sister to Tetraberlinia (ITS data). Nonetheless, the molecular phylogeny generally supports the taxonomy of Wieringa in subdividing the genus Monopetalanthus into distinct groups, none of which retains the name Monopetalanthus.
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