TY - JOUR T1 - A revision of Meiogyne (Annonaceae) in Thailand, with descriptions of four new species JF - Thai Forest Bulletin (Botany) Y1 - 2019 DO - 10.20531/tfb.2019.47.1.13 A1 - Johnson, David M. A1 - Liu, Ming-Fai A1 - Saunders, Richard M. K. A1 - Chalermglin, Piya A1 - Chaowasku, Tanawat SP - 91–107 KW - Annonaceae KW - Southeast Asia KW - taxonomy KW - tree diversity AB - We review the species diversity of the Asian genus Meiogyne (Annonaceae) in Thailand. Four new species, M. anomalocarpa, M. chiangraiensis, M. gardneri, and M. maxiflora, are described. Meiogyne anomalocarpa has the widest distribution of any Meiogyne species in Thailand, but the other three species are narrowly distributed. Meiogyne anomalocarpa and M. maxiflora have the axillary inflorescences typical of the genus, but in M. chiangraiensis and M. gardneri the inflorescences are flagelliform and arise from the lower trunk, a morphology previously unreported from members of this genus. The presence of M. chiangraiensis in northern Thailand extends the range of the genus significantly northward. Meiogyne caudata is reported as new to the flora of Thailand. Several Meiogyne specimens from southernmost Thailand previously identified as M. virgata in the past by various workers were found to be more similar to M. kanthanensis, recently described from Perak, Peninsular Malaysia. A key is provided for the eight species currently recognized as occurring in the country. VL - 47 UR - https://www.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/165919 ER - TY - JOUR T1 - A new Annonaceae genus, Wuodendron, provides support for a post-boreotropical origin of the Asian-Neotropical disjunction in the tribe Miliuseae JF - Taxon Y1 - 2018 DO - 10.12705/672.2 A1 - Xue, Bine A1 - Tan, Yun-Hong A1 - Thomas, Daniel C. A1 - Chaowasku, Tanawat A1 - Hou, Xue-Liang A1 - Saunders, Richard M. K. SP - 250–266 AB - Recent molecular and morphological studies have clarified generic circumscriptions in Annonaceae tribe Miliuseae and resulted in the segregation of disparate elements from the previously highly polyphyletic genus Polyalthia s.l. Several names in Polyalthia nevertheless remain unresolved, awaiting assignment to specific genera, including Polyalthia litseifolia. Phylogenetic analyses of seven chloroplast regions (atpB-rbcL, matK, ndhF, psbA-trnH, rbcL, trnL-F, ycf1; ca. 8.3 kb, 116 accessions, including representatives of all currently accepted genera in subfamily Malmeoideae) unambiguously placed Polyalthia litseifolia in a clade with three accessions from Thailand, which have previously been shown to represent an undescribed genus sister to the Neotropical clade (Desmopsis, Sapranthus, Stenanona, Tridimeris) in the predominantly Asian tribe Miliuseae. The collective clade is sister to Meiogyne. Polyalthia litseifolia shares several diagnostic characters with most species in the Neotropical genera and Meiogyne, including: petals that are similar in shape and size in both whorls; multiple ovules per ovary in one or two rows; and lamelliform endosperm ruminations. It is distinct in being deciduous, bearing subpetiolar buds and having inflorescences growing from the leaf scar of the dropped leaves. Morphological comparisons and phylogenetic analyses corroborate its recognition as a new genus, which is formally described and illustrated here as Wuodendron. Polyalthia litseifolia is furthermore found to be conspecific with Desmos praecox, and the latter name is used as the basis for the name of the type. Molecular divergence time estimates under an uncorrelated lognormal relaxed clock place the Wuodendron-Neotropical clade split within the Miocene (ca. 14–12 Ma), highlighting the importance of post-boreotropical dispersal and vicariance in shaping intercontinental tropical disjunctions in Annonaceae. VL - 67 UR - https://www.ingentaconnect.com/contentone/iapt/tax/2018/00000067/00000002/art00003 ER - TY - JOUR T1 - A mega-phylogeny of the Annonaceae: taxonomic placement of five enigmatic genera and support for a new tribe, Phoenicantheae JF - Scientific Reports Y1 - 2017 DO - 10.1038/s41598-017-07252-2 A1 - Guo, Xing A1 - Tang, Chin Cheung A1 - Thomas, Daniel C. A1 - Couvreur, Thomas L. P. A1 - Saunders, Richard M. K. SP - 7323 AB - The Annonaceae, the largest family in the early-divergent order Magnoliales, comprises 107 genera and c. 2,400 species. Previous molecular phylogenetic studies targeting different taxa have generated large quantities of partially overlapping DNA sequence data for many species, although a large-scale phylogeny based on the maximum number of representatives has never been reconstructed. We use a supermatrix of eight chloroplast markers (rbcL, matK, ndhF, psbA-trnH, trnL-F, atpB-rbcL, trnS-G and ycf1) to reconstruct the most comprehensive tree to date, including 705 species (29%) from 105 genera (98%). This provides novel insights into the relationships of five enigmatic genera (Bocagea, Boutiquea, Cardiopetalum, Duckeanthus and Phoenicanthus). Fifteen main clades are retrieved in subfamilies Annonoideae and Malmeoideae collectively, 14 of which correspond with currently recognised tribes. Phoenicanthus cannot be accommodated in any existing tribe, however: it is retrieved as sister to a clade comprising the tribes Dendrokingstonieae, Monocarpieae and Miliuseae, and we therefore validate a new tribe, Phoenicantheae. Our results provide strong support for many previously recognised groups, but also indicate non-monophyly of several genera (Desmopsis, Friesodielsia, Klarobelia, Oxandra, Piptostigma and Stenanona). The relationships of these non-monophyletic genera—and two other genera (Froesiodendron and Melodorum) not yet sampled—are discussed, with recommendations for future research. VL - 7 UR - https://www.nature.com/articles/s41598-017-07252-2 ER - TY - JOUR T1 - Mitrephora monocarpa (Annonaceae): a new species from Surat Thani Province, Peninsular Thailand JF - PhytoKeys Y1 - 2019 DO - 10.3897/phytokeys.121.34271 A1 - Saunders, Richard M. K. A1 - Chalermglin, Piya SP - 73–80 AB - A new species, Mitrephora monocarpa R.M.K.Saunders & Chalermglin, sp. nov. (Annonaceae), is described from Surat Thani Province in Peninsular Thailand. It resembles two other species, M. alba Ridl. and M. keithii Ridl., with which it is broadly sympatric, but can be distinguished by its solitary flowers (not borne in thyrsoid inflorescences as in most other Mitrephora species), single carpel per flower (and hence single monocarp per fruit) and the lack of a monocarp stipe. A key to the nine Mitrephora species in Thailand is provided. VL - 121 UR - https://phytokeys.pensoft.net/article/34271/ ER - TY - JOUR T1 - Two new species and two new records of Artabotrys (Annonaceae) from Thailand JF - PhytoKeys Y1 - 2018 DO - 10.3897/phytokeys.95.23434 A1 - Chen, Junhao A1 - Chalermglin, Piya A1 - Saunders, Richard M. K. SP - 71–81 AB - Two new species of Artabotrys are described from Thailand. Artabotrys tanaosriensis J.Chen, Chalermglin & R.M.K.Saunders, sp. nov., is similar to A. oblanceolatus Craib but differs in its symmetrical, cuneate or decurrent leaf base, externally distinct outer petal blades and claws, deltoid and undulate outer petal blades, rhomboid and undulate inner petal blades and shorter, subsessile and slightly beaked monocarps. Artabotrys spathulatus J.Chen, Chalermglin & R.M.K.Saunders, sp. nov., is most similar to A. tanaosriensis but differs in having flat outer petal blades, broadly rhomboid outer petal claws, broadly spathulate and strongly concave inner petal blades and strongly beaked monocarps. Two new records for the Flora of Thailand are furthermore reported here: A. punctulatus C.Y.Wu ex S.H.Yuan and A. byrsophyllus I.M.Turner & Utteridge, which were previously confused with A. aeneus Ast and A. grandifolius King, respectively. A key to Artabotrys species indigenous to Thailand is provided here. VL - 95 UR - https://phytokeys.pensoft.net/article/23434/ ER - TY - JOUR T1 - Pruning the polyphyletic genus Polyalthia (Annonaceae) and resurrecting the genus Monoon JF - TaxonTaxon Y1 - 2012 A1 - Xue, Bine A1 - Su, Yvonne C. F. A1 - Thomas, Daniel C. A1 - Saunders, Richard M. K. SP - 1021 EP - 1039 KW - Annonaceae KW - ENICOSANTHUM KW - HAPLOSTICHANTHUS KW - MOLECULAR PHYLOGENETICS KW - MONOON KW - nomenclature KW - POLYALTHIA KW - taxonomy KW - WOODIELLANTHA AB - The highly polyphyletic status of the species-rich genus Polyalthia (Annonaceae) remains one of the most significant impediments to revisionary and floristic taxonomic research in the family. Although Polyalthia has recently been reduced in taxonomic scope, the remaining species in the genus still form a phylogenetically disparate and morphologically heterogeneous assemblage. We use maximum parsimony, maximum likelihood and Bayesian phylogenetic reconstructions based on chloroplast DNA sequence data (matK, rbcL, trnL-F) to show that the remaining Polyalthia species segregate into three clades: a clade sister to Miliusa; a clade that also includes all Enicosanthum and Woodiellantha species sampled, sister to Neo-uvaria; and a clade that also includes all Haplostichanthus species sampled, inferred (based on previous research) to be sister to Popowia. Diagnostic morphological and anatomical characters are evaluated for the latter two clades, and diagnostic leaf and seed characters identified. Based on these results, the generic name Monoon is resurrected for the clade that includes Enicosanthum and Woodiellantha, following the transfer of 37 species from Polyalthia s.l., 18 species from Enicosanthum and the single Woodiellantha species. The generic name Haplostichanthus is furthermore synonymised with Polyalthia s.str., necessitating nine nomenclatural changes, including six new combinations and three replacement names. VL - 61 JO - Taxon ER - TY - JOUR T1 - Further fragmentation of the polyphyletic genus Polyalthia (Annonaceae): molecular phylogenetic support for a broader delimitation of Marsypopetalum JF - Systematics and BiodiversitySystematics and Biodiversity Y1 - 2011 A1 - Xue, Bine A1 - Su, Yvonne C. F. A1 - Mols, Johan B. A1 - KeßLer, Paul J. A. A1 - Saunders, Richard M. K. SP - 17 EP - 26 PB - Taylor & Francis VL - 9 SN - 1477-2000 ER - TY - JOUR T1 - An extended phylogeny of Pseuduvaria (Annonaceae) with descriptions of three new species and a reassessment of the generic status of Oreomitra JF - Systematic BotanySystematic Botany Y1 - 2010 A1 - Su, Yvonne C. F. A1 - Chaowasku, Tanawat A1 - Saunders, Richard M. K. SP - 30 EP - 39 KW - classification KW - NEW GUINEA KW - PENINSULAR MALAYSIA KW - SYSTEMATICS KW - taxonomy KW - THAILAND AB - Three new species of Pseuduvaria (Annonaceae) from Peninsular Thailand and Peninsular Malaysia are described and named as P. fragrans, P. gardneri, and P. glossopetala. A recent molecular phylogenetic study, based on 51 species (including P. fragrans), elucidated the evolutionary relationships within the genus. The present study includes P. gardneri and P. glossopetala in the phylogenetic analyses using maximum likelihood and Bayesian inference methods, based on five chloroplast regions (psbA-trnH spacer, trnL-F, matK, rbcL, and atpB-rbcL spacer). The new nomenclatural combination Pseuduvaria phuyensis is also validated in accordance with the phylogenetic analyses which show that Craibella phuyensis and Pseuduvaria form a well-supported monophyletic clade. The new species and new nomenclature combination bring the total number of species in Pseuduvaria to 56. The taxonomic status of the enigmatic monotypic genus Oreomitra from New Guinea is furthermore evaluated, and the name shown to be synonymous with Pseuduvaria. VL - 35 JO - Syst Bot ER - TY - JOUR T1 - Pollen structure, tetrad cohesion and pollen-connecting threads in Pseuduvaria (Annonaceae) JF - Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society Y1 - 2003 A1 - Su, Yvonne C. F. A1 - Saunders, Richard M. K. SP - 69 EP - 78 VL - 143 JO - Bot J Linn Soc ER - TY - JOUR T1 - Phylogeny of the basal angiosperm genus Pseuduvaria (Annonaceae) inferred from five chloroplast DNA regions, with interpretation of morphological character evolution JF - Molecular Phylogenetics and EvolutionMolecular Phylogenetics and Evolution Y1 - 2008 A1 - Su, Y.C.F. A1 - Smith, G.J.D. A1 - Saunders, Richard M. K. SP - 188 EP - 206 VL - 48 JO - Mol Phylogenet Evol ER - TY - JOUR T1 - Five new nomenclatural combinations in Dasymaschalon and Goniothalamus (Annonaceae) JF - Nordic Journal of BotanyNordic Journal of Botany Y1 - 2011 A1 - Saunders, Richard M. K. A1 - Wang, Jing SP - 674 EP - 676 AB - Three new nomenclatural combinations are validated in Dasymaschalon (Annonaceae), with the elevation of varietal names to the specific rank: D. longiusculum (Bân) Jing Wang & R. M. K. Saunders, D. megalanthum (Merr.) Jing Wang & R. M. K. Saunders, and D. minutiflorum (Nurmawati) Jing Wang & R. M. K. Saunders. New nomenclatural combinations are furthermore validated in Goniothalamus (Annonaceae), following the successful conservation of the generic name over Richella. Two species names in Richella are here transferred to Goniothalamus as G. monospermus (A. Gray) R. M. K. Saunders and G. obtusatus (Baill.) R. M. K. Saunders. PB - Blackwell Publishing Ltd VL - 29 SN - 1756-1051 JO - Nord J Bot ER - TY - JOUR T1 - Proposal to conserve the name Enicosanthum against Monoon (Annonaceae) JF - TaxonTaxon Y1 - 2011 A1 - Saunders, Richard M. K. A1 - Xue, B. SP - 236 EP - 237 VL - 60 JO - Taxon ER - TY - JOUR T1 - Floral evolution in the Annonaceae: hypotheses of homeotic mutations and functional convergence JF - Biological ReviewsBiological Reviews Y1 - 2010 A1 - Saunders, Richard M. K. SP - 571–591 VL - 85 N1 - *** JO - Biol Rev ER - TY - JOUR T1 - The diversity and evolution of pollination systems in Annonaceae JF - Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society Y1 - 2012 A1 - Saunders, Richard M. K. SP - 222 EP - 244 KW - cantharophily KW - pollination ecology KW - reproductive biology AB - The pollination biology of Annonaceae has received considerable attention, with data now available for > 45% of the genera (or genus-equivalent clades) included in recent molecular phylogenetic analyses. This provides a basis for understanding evolutionary shifts in the pollination system within the family. The present study focuses on subfamilies Anaxagoreoideae, Ambavioideae and Annonoideae, for which robust, well-resolved phylogenetic trees are available. Information is summarized on the pollination biology of individual clades and the evolutionary adaptations favouring different pollinator guilds evaluated. Although the majority of species of Annonaceae are pollinated by small beetles, five other pollinator groups are known: large beetles, thrips, flies, bees and cockroaches. Small-beetle pollination is inferred as the ancestral pollination system, with all other systems being derived. Evolutionary shifts to pollination by large beetles, thrips and flies are unlikely to have been significantly constrained by previous adaptations favouring pollination by small beetles, as many of the adaptations to these different pollinator guilds are similar (including protogyny, partially enclosed floral chambers and olfactory cues). In contrast, however, the evolutionary shift to bee pollination has presumably been constrained by both protogyny (as pollen-collecting bees are unlikely to visit pistillate-phase flowers) and the presence of floral chambers. © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, 169, 222–244. PB - Blackwell Publishing Ltd VL - 169 SN - 1095-8339 JO - Bot J Linn Soc ER - TY - JOUR T1 - Phylogenetic affinities of Polyalthia species (Annonaceae) with columellar-sulcate pollen: Enlarging the Madagascan endemic genus Fenerivia JF - TaxonTaxon Y1 - 2011 A1 - Saunders, Richard M. K. A1 - Su, Y.F.C. A1 - Xue, B. SP - 1407 EP - 1416 VL - 60 JO - Taxon ER - TY - JOUR T1 - Functional Monoecy Due to Delayed Anther Dehiscence: A Novel Mechanism in Pseuduvaria mulgraveana (Annonaceae) JF - PLoS ONEPLoS ONE Y1 - 2013 A1 - Pang, Chun-Chiu A1 - Scharaschkin, Tanya A1 - Su, Yvonne C. F. A1 - Saunders, Richard M. K. SP - e59951 AB -
Unlike most genera in the early-divergent angiosperm family Annonaceae,