| Abstrakt: |
The genus Phyllanthusis paraphyletic as currently circumscribed, with the genera Breynia, Glochidionand Synostemonnested within it. A phylogeny based on nuclear (ITS, PHYC) and chloroplast (matK, accD‐psaI, trnS‐trnG) markers is presented, including 18/18 subgenera and 53/70 sections. Differences in habit, branching type, floral and fruit characters are discussed, and we find indications for shifts in pollination and dispersal strategies possibly underlying the convergent evolution of these characters in multiple clades. Several taxonomic issues were found in the subgeneric classification of Phyllanthusthat will require new transfers and rank changes. Phyllanthussubg. Anesonemoides, subg. Conami, subg. Emblica, subg. Gomphidium, subg. Kirganeliaand subg. Phyllanthusare polyphyletic, and several sections appear to be paraphyletic (e.g., P.sect. Anisonema, sect. Emblicastrum, sect. Pseudoactephila, sect. Swartziani, and sect. Xylophylla); P.subg. Phyllanthodendronis furthermore paraphyletic with the genus Glochidionnested within. To create a classification of tribe Phyllantheae that comprises exclusively monophyletic taxa, it is necessary to treat several clades at the same taxonomic rank as the genera Breynia, Glochidionand Synostemon. Since combining all genera would lead to one giant heterogeneous genus that is difficult to define, we recommend dividing Phyllanthusinto several monophyletic genera, which have previously been recognized and often possess diagnostic (combinations of) morphological characters. This new classification is forthcoming. |
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