@ARTICLE{TreeBASE2Ref18485, author = {Alexandra N. Muellner and Dionyssios D. Vassiliades and Susanne S Renner}, title = {Placing Biebersteiniacae, a herbaceous clade of Sapindales, in a temporal and geographic context}, year = {2007}, keywords = {}, doi = {10.1007/s00606-007-0546-x}, url = {}, pmid = {}, journal = {Plant Systematics and Evolution}, volume = {266}, number = {}, pages = {233--252}, abstract = {Biebersteiniaceae comprise a single genus with four species of perennial herbs occurring from central Asia to Greece. A previous molecular phylogenetic study placed one of the species in an isolated position in Sapindales, while morphological studies had placed Biebersteinia in or near Geraniaceae, albeit doubtfully. We tested the monophyly and placement of the family with data from the chloroplast genes rbcL and atpB obtained for all four species, other major clades of Sapindales and outgroups for a total of up to 114 taxa. Parsimony, Bayesian, and likelihood analyses place Biebersteinia in Sapindales, possibly as sister to the other eight families. Strict and relaxed molecular clocks constrained with fossils of Biebersteinia and up to eight other Sapindales suggest that the Biebersteinia crown group diversified in the Oligocene and Miocene, while the stem lineage dates back to the Late Paleocene. Ages for other sapindalean families are earlier than those obtained in more sparsely sampled analyses, although estimates for Burseraceae agree surprisingly well. Ancestral area analyses suggest that Biebersteinia expanded from the eastern part of its range (i.e. Tibet and Inner Mongolia) to the west, although analyses are hampered by the unclear sister group relationships.} }

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