@article {669, title = {Evolution and phylogenetic significance of pollen in Annonaceae}, journal = {Botanical Journal of the Linnean Society}, volume = {169}, number = {1}, year = {2012}, pages = {190-221}, publisher = {Blackwell Publishing Ltd}, abstract = {The remarkable diversity of pollen morphology in Annonaceae has attracted systematic attention since the 1970s. Optimization of pollen characters on a molecular tree confirms that granular monosulcate pollen, as in Anaxagorea and subfamily Ambavioideae, was ancestral in the family. However, granular structure is derived for angiosperms as a whole, and exine characters are highly homoplastic in Annonaceae. Because columellar taxa (Annickia, Bocageeae) diverged earlier than previously thought, columellae may have re-originated in the common ancestor of Malmeoideae and Annonoideae, which make up most of the family, with several later reversals to granular structure. In Malmeoideae, loss of the sulcus and origin of a verrucate tectum occurred in the tribe Miliuseae, followed by an uncertain number of origins of disulculate pollen. Tetrads arose several times in Annonoideae, but reverted to monads in Isolona and probably Uvarieae. Recognition that microspores rotate during development in Annona and Cymbopetalum suggests that the proximal thin area in these taxa is a modified distal sulcus, but rotation does not occur in all tetrad groups; a broader survey is needed to evaluate this phenomenon.~{\textcopyright} 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 169, 190{\textendash}221.}, keywords = {angiosperms, Magnoliales, morphology, palynology, phylogeny, SYSTEMATICS}, isbn = {1095-8339}, url = {http://dx.doi.org/10.1111/j.1095-8339.2012.01241.x}, author = {Doyle, James A. and Le Thomas, Annick} } @article {667, title = {Dating clades with fossils and molecules: the case of Annonaceae}, journal = {Botanical Journal of the Linnean Society}, volume = {169}, number = {1}, year = {2012}, pages = {84-116}, publisher = {Blackwell Publishing Ltd}, abstract = {This article addresses the challenges involved in estimating the ages of clades using fossils and DNA sequences. We review the principles and problems of placing fossils in trees of extant taxa and using them to constrain the ages of nodes in molecular dating analyses. Endressinia and Futabanthus provide minimum ages of 112~Mya for the stem lineage and 89~Mya for the crown group of Annonaceae, and the diversity of endosperm ruminations in seeds from the London Clay indicates that the four main clades of Annonaceae had diverged by 50~Mya. Ages inferred using these minimum constraints and a plastid phylogenetic tree for Annonaceae, particularly crown ages of the two main clades (Malmeoideae and Annonoideae), depend on assumptions regarding the pattern of variation in rates of molecular evolution. Our results using methods that assume rate autocorrelation or log-normal distribution of rates suggest that neither assumption fits well the apparently abrupt changes in rates in Annonaceae. Instead of soft-bounded age constraints, we argue for the use of only well-substantiated fossil evidence by means of priors with hard bounds. Thus, we can infer ages that take into account both palaeontological and phylogenetic uncertainty, without confounding the different factors involved.~{\textcopyright} 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 169, 84{\textendash}116.}, keywords = {age constraints, BEAST, fossil calibration, Magnoliales, molecular dating, phylogeny, r8s, relaxed clock}, isbn = {1095-8339}, url = {http://dx.doi.org/10.1111/j.1095-8339.2012.01234.x}, author = {Michael D. Pirie and Doyle, James A.} } @article {110, title = {Molecular phylogenetic support for a broader delimitation of Uvaria (Annonaceae), inclusive of Anomianthus, Cyathostemma, Ellipeia, Ellipeiopsis and Rauwenhoffia}, journal = {Systematics and Biodiversity}, volume = {7}, number = {3}, year = {2009}, note = {494YKTimes Cited:0Cited References Count:59}, month = {Sep}, pages = {249-258}, abstract = {Uvaria (Annonaceae), a large palaeotropical genus of woody climbers, closely resembles several other smaller genera, including Anomianthus, Cyathostemma, Ellipeia, Ellipeiopsis and Rauwenhoffia. A molecular phylogenetic analysis of this group was undertaken using maximum parsimony, maximum likelihood and Bayesian methods based on four chloroplast DNA regions (matK, psbA-trnH spacer, rbcL and trnL-F). The resultant trees were moderately well resolved with significant statistical support for most nodes. Uvaria is shown unequivocally to be paraphyletic, with all representatives of the other five genera nested within it. The distinguishing morphological characteristics of the related genera are re-evaluated, and interpreted as no more than specialised adaptations of the basic Uvari structure. The generic names Anomianthus, Cyathostemma, Ellipeia, Ellipeiopsis and Rauwenhoffia are accordingly reduced to synonymy with Uvaria, necessitating 11 new nomenclatural combinations and four replacement names.}, keywords = {age, amplification, Annonaceae, anomianthus, chloroplast DNA, cyathostemma, ellipeia, ellipeiopsis, lowland dipterocarp forest, malaysia, melodorum, nomenclature, phylogeny, pollination, rauwenhoffia, regions, sarawak, SYSTEMATICS, taxonomy, uvaria}, isbn = {1477-2000}, url = {://000269855600002}, author = {Zhou, L. L. and Su, Y.C.F. and Saunders, R.M.K.} }