Evolution, classification and biogeography of Velloziaceae

Evolution, classification and biogeography of Velloziaceae
Evolution, classification and biogeography of Velloziaceae

There is considerable discord among treatments of the Velloziaceae despite the large amount of data that exists for this family. Mello-Silva et al. undertake analyses of 48 species representing all ten genera, including data on DNA sequences from the atpB-rbcL spacer, trnL-trnF spacer, trnL intron, trnH-psbA spacer, ITS ribosomal DNA spacers and morphology. The results imply recognition of five genera (Acanthochlamys (Xerophyta (Barbacenia (Barbaceniopsis, Vellozia)))), solving the long-standing controversies among recent classifications of the family. They also suggest a Gondwanan origin for Velloziaceae, with a vicariant pattern of distribution.