@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 {xue_new_2018, title = {A new Annonaceae genus, Wuodendron, provides support for a post-boreotropical origin of the Asian-Neotropical disjunction in the tribe Miliuseae}, journal = {Taxon}, volume = {67}, number = {2}, year = {2018}, pages = {250{\textendash}266}, abstract = {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{\textendash}12 Ma), highlighting the importance of post-boreotropical dispersal and vicariance in shaping intercontinental tropical disjunctions in Annonaceae.}, doi = {10.12705/672.2}, url = {https://www.ingentaconnect.com/contentone/iapt/tax/2018/00000067/00000002/art00003}, author = {Xue, Bine and Tan, Yun-Hong and Thomas, Daniel C. and Chaowasku, Tanawat and Hou, Xue-Liang 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.} }