@article {johnson_revision_2019, title = {A revision of Meiogyne (Annonaceae) in Thailand, with descriptions of four new species}, journal = {Thai Forest Bulletin (Botany)}, volume = {47}, number = {1}, year = {2019}, month = {jun}, pages = {91{\textendash}107}, abstract = {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.}, keywords = {Annonaceae, Southeast Asia, taxonomy, tree diversity}, issn = {2465-423X}, doi = {10.20531/tfb.2019.47.1.13}, url = {https://www.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/165919}, author = {Johnson, David M. and Liu, Ming-Fai and Saunders, Richard M. K. and Chalermglin, Piya and Chaowasku, Tanawat} } @article {5688, title = {Pruning the polyphyletic genus Polyalthia (Annonaceae) and resurrecting the genus Monoon}, journal = {TaxonTaxon}, volume = {61}, number = {5}, year = {2012}, pages = {1021-1039}, abstract = {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.}, keywords = {Annonaceae, ENICOSANTHUM, HAPLOSTICHANTHUS, MOLECULAR PHYLOGENETICS, MONOON, nomenclature, POLYALTHIA, taxonomy, WOODIELLANTHA}, author = {Xue, Bine and Su, Yvonne C. F. and Thomas, Daniel C. and Saunders, Richard M. K.} } @article {5592, title = {An extended phylogeny of Pseuduvaria (Annonaceae) with descriptions of three new species and a reassessment of the generic status of Oreomitra}, journal = {Systematic BotanySystematic Botany}, volume = {35}, number = {1}, year = {2010}, pages = {30-39}, abstract = {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.}, keywords = {classification, NEW GUINEA, PENINSULAR MALAYSIA, SYSTEMATICS, taxonomy, THAILAND}, author = {Su, Yvonne C. F. and Chaowasku, Tanawat and Saunders, Richard M. K.} } @article {5147, title = {Reassessing the taxonomic status of two enigmatic Desmos species (Annonaceae): Morphological and molecular phylogenetic support for a new genus, Wangia}, journal = {Journal of Systematics and EvolutionJournal of Systematics and Evolution}, year = {2013}, pages = {n/a-n/a}, abstract = {The systematic position of two enigmatic Annonaceae species from China, Desmos saccopetaloides and Desmos yunnanensis, has been controversial, with both species having been transferred between several different genera within subfamilies Annonoideae and Malmeoideae. Phylogenetic analyses of eight chloroplast regions (matK, ndhF, ndhF-rpl32, psbA-trnH, rbcL, rpl32-trnL, trnL-F, and ycf1; ca. 9.2 kb, 66 taxa) unambiguously placed D. saccopetaloides in a subclade of tribe Miliuseae, nested among the genera Monoon, Neo-uvaria, Phaeanthus, Sageraea, and Stelechocarpus. This relationship was also supported by endosperm rumination patterns in the seed; other morphological characters furthermore indicated that D. saccopetaloides has closer affinities with Monoon, Neo-uvaria, and Phaeanthus rather than either Sageraea or Stelechocarpus. Desmos saccopetaloides is distinguished from these genera by its leaf-opposed inflorescences, sepaloid outer petals, saccate inner petals with basal glandular tissue, moniliform monocarps with uniseriate seeds, and rectangular disulculate pollen with two {\textquotedblleft}cryptoapertures{\textquotedblright}. On the basis of the combined molecular phylogenetic and morphological data, we propose a new genus, Wangia, to accommodate D. saccopetaloides. The molecular phylogenetic analyses furthermore indicated that Desmos yunnanensis belongs to the genus Dasymaschalon: examination of the type collections revealed that it is conspecific with Dasymaschalon obtusipetalum, although the combination Dasymaschalon yunnanense has nomenclatural priority.}, keywords = {Dasymaschalon, molecular phylogeny, morphology, Phaeanthus, taxonomy}, isbn = {1759-6831}, author = {Guo, Xing and Wang, Jing and Xue, Bine and Thomas, Daniel C. and Su, Yvonne C. F. and Tan, Yun-Hong and Saunders, Richard M. K.} }