Nordic Journal of Botany, Journal Year: 2021, Volume and Issue: 39(1)
Published: Jan. 1, 2021
Artabotrys chitkokoi K.Z.Hein, Naive & J.Chen from Sagaing Region, Myanmar, is described and illustrated as a species new to science. Description, colour plates, discussion of similar taxa, phenology, distribution preliminary conservation status assessment are provided. With this discovery, Myanmar now holds total eight key these
Language: Английский
Molecular Phylogenetics and Evolution, Journal Year: 2019, Volume and Issue: 142, P. 106659 - 106659
Published: Oct. 19, 2019
A major goal of phylogenetic systematics is to understand both the patterns diversification and processes by which these are formed. Few studies have focused on ancient, species-rich Magnoliales clade its pattern. Within Magnoliales, pantropically distributed Annonaceae far most genus-rich family-level clade, with c. 110 genera 2,400 species. We investigated across identified traits that show varied associations rates using a time-calibrated phylogeny 835 species (34.6% sampling) 11,211 aligned bases from eight regions plastid genome (rbcL, matK, ndhF, psbA-trnH, trnL-F, atpB-rbcL, trnS-G, ycf1). Twelve rate shifts were BAMM: in Annona, Artabotrys, Asimina, Drepananthus, Duguetia, Goniothalamus, Guatteria, Uvaria, Xylopia, tribes Miliuseae Malmeeae, Desmos-Dasymaschalon-Friesodielsia-Monanthotaxis clade. TurboMEDUSA method-of-moments estimator analyses showed largely congruent results. positive relationship between richness revealed PGLS. Our results high likely result recent increased rather than steady accumulation via 'museum model'. further explore possible role selected (habit, pollinator trapping, floral sex expression, pollen dispersal unit, anther septation, seed unit) shaping patterns, based inferences BiSSE, MuSSE, HiSSE, FiSSE analyses. suggest liana habit, presence circadian androdioecy, seeds as single-seeded monocarp fragments closely correlated higher rates; aggregation contrast, associated lower rates.
Language: Английский
Citations
40
PhytoKeys, Journal Year: 2022, Volume and Issue: 207, P. 1 - 532
Published: Sept. 20, 2022
Annonaceae is a major pantropical family with 113 genera and about 2550 species. Cameroon one of the most biodiverse countries in Africa but its flora remains incompletely known. In this volume Flora Cameroon, we describe 166 native taxa representing 163 species 28 within Annonaceae. A total 22 (about 13%) are endemic to country. We provide keys all genera, species, infraspecific taxa. For each detailed morphological description map distribution provided. Distribution maps diversity analyses based on taxonomically verified database 2073 collections. Across Africa, center for harboring highest numbers genera. example, harbors number African only genus Annonaceae, Xylopia . found across 10 administrative regions concentrated tropical rain forest areas situated south South-West. The around Bipindi Mount show levels diversity, correlated collection effort. Line drawings and/or photographs accompany One new science Uvariopsis etugeana Dagallier & Couvreur sp. nov. described. also undertake nomenclatural changes such as lectotypifications, six synonymies two combinations ( Uvaria anisotricha (Le Thomas) Couvreur, comb. ; Uvariodendron fuscum var. giganteum (Engl.) ).
Language: Английский
Citations
16
Nordic Journal of Botany, Journal Year: 2025, Volume and Issue: unknown
Published: March 19, 2025
Artabotrys rubriflorus sp. nov. is described as a new species of Annonaceae, collected from Malipo, Yunnan province, China. It can be distinguished the other nine by its red petals and stamens, well reduced number carpels per flower (7–9), fewer monocarps fruit (4), presence 1–2 seeds within each monocarp. The specimens this were gathered through fieldwork subsequently subjected to rigorous analysis using both classical taxonomical methods molecular phylogenetic analysis. reconstruction, based on four chloroplast DNA regions (matK, rbcL, trnLF psbAtrnH), was carried out employing maximum parsimony, likelihood Bayesian inference approaches. These analyses confirmed systematic positioning genus , while also establishing distinctiveness species. Additionally, comprehensive detailed description species, along with key for identification, provided.
Language: Английский
Citations
0
Annals of Botany, Journal Year: 2023, Volume and Issue: 133(5-6), P. 677 - 696
Published: Sept. 2, 2023
Abstract Background and Aims Throughout the Cenozoic, Africa underwent several climatic geological changes impacting evolution of tropical rain forests (TRFs). African TRFs are thought to have extended from east west in a ‘pan-African’ TRF, followed by events fragmentation during drier climate periods. During Miocene, cooling mountain uplift led aridification open habitats expanded at expense TRFs, which probably experienced local extinctions. However, plants, these drivers were previously inferred using limited taxonomic molecular data. Here, we tested impact on diversification within diverse clade Monodoreae (Annonaceae) composed 90 tree species restricted TRFs. Methods We reconstructed near-complete phylogenetic tree, based 32 nuclear genes, dated relaxed clocks fossil calibrations Bayesian framework. biogeographical history dynamics multiple birth–death models. Key Results originated East ~25 million years ago (Ma) toward Central Miocene. range contractions middle Miocene document important connections between West after 15–13 Ma. Our results indicated sudden extinction event late an increase speciation rates. Birth–death models suggested that elevation change (orogeny) is positively linked this clade. Conclusion as source species, possibly for plant diversity general. support ‘sequential scenario diversification’ increased triggered TRF Monodoreae. This was quickly forests, subsequently enhancing lagged resulting vicariance improved conditions. In contrast previous ideas, shown played positive role diversification.
Language: Английский
Citations
8
Plant Species Biology, Journal Year: 2020, Volume and Issue: 35(3), P. 210 - 223
Published: April 27, 2020
Abstract Artabotrys comprises a species‐poor early divergent grade (EDG) and main species‐rich clade (“main clade,” MAC). All members of the MAC exhibit remarkably well‐conserved floral Bauplan characterized by tightly enclosed chamber with an elaborate rim between inner petal blade claw. Conversely, EDG resembles sister genus Xylopia in lacking rim, one species ( brachypetalus ) bearing petals that lack distinction claw altogether. The phenology pollination ecology two exemplar species— from blumei MAC—are compared, including assessment effective pollinators their activity patterns, scent chemistry thermogenesis. Our study revealed exhibits abbreviated anthesis c . 27 hr), morphology are clearly consistent pollinator trapping, may be pollinated small beetles. has typical anthetic duration c. 45 lacks trapping mechanism, is honey bees curculionid “xylopioid” traits likely to plesiomorphic, whereas apomorphic for functionally significant pollinators.
Language: Английский
Citations
14
Frontiers in Ecology and Evolution, Journal Year: 2021, Volume and Issue: 9
Published: Oct. 4, 2021
Apocynaceae (the dogbane and milkweed family) is one of the ten largest flowering plant families, with approximately 5,350 species diverse morphology ecology, ranging from large trees lianas that are emblematic tropical rainforests, to herbs in temperate grasslands, succulents dry, open landscapes, vines a wide variety habitats. Despite specialized conservative basic floral architecture, hyperdiverse flower size, corolla shape, especially derived morphological features. These mainly associated development corolline and/or staminal coronas spectrum integration structures culminating formation gynostegium pollinaria—specialized pollen dispersal units. To date, no detailed analysis has been conducted estimate origin diversification this lineage space time. Here, we use most comprehensive time-calibrated phylogeny Apocynaceae, which includes 20% covering all major lineages, information on number distributions obtained up-to-date monograph family investigate biogeographical history its dynamics. South America, Africa, Southeast Asia (potentially including Oceania), were recovered as likely ancestral area extant diversity; climatic belt equatorial region retained oldest lineages these three regions represent museums family. Africa was confirmed cradle pollinia-bearing main source intercontinental dispersals. We detected 12 shifts toward accelerated diversification, 11 APSA clade (apocynoids, Periplocoideae, Secamonoideae, Asclepiadoideae), eight six within Asclepiadoideae. Wind-dispersed comose seeds, climbing growth form, pollinia appeared sequentially probably work synergistically occupation drier cooler Overall, hypothesize temporal patterns shaped by sequence innovations conferred higher capacity disperse establish seasonal, unstable, habitats, have expanded since Eocene-Oligocene climate transition.
Language: Английский
Citations
12
PhytoKeys, Journal Year: 2020, Volume and Issue: 151, P. 67 - 81
Published: June 17, 2020
Two new species of Artabotrys (Annonaceae) are described from peninsular Thailand. longipetalus J.Chen & Eiadthong, sp. nov. , is unique among in Thailand having linear petals, relatively long flower pedicels and sessile monocarps. insurae resembles uniflorus (Griff.) Craib, but can be distinguished by its oblique leaf base, flat petal blades, apiculate anther connective apex the presence a monocarp stipe. In addition, two records for Flora reported, viz. crassifolius Hook.f. Thomson pleurocarpus Maingay ex Thomson; both so far only known A key to 20 provided.
Language: Английский
Citations
11
Willdenowia - Annals of the Botanic Garden and Botanical Museum Berlin-Dahlem, Journal Year: 2021, Volume and Issue: 51(1)
Published: March 23, 2021
Artabotrys R. Br. is one of the larger genera Annonaceae with over 100 species distributed throughout palaeotropics plus northern Australia. Although genus morphologically very well circumscribed, delimitation quite problematic owing to overlapping morphological characteristics. In Thailand, 20 have been reported, including A. multiflorus C. E. Fisch. Detailed comparisons type specimen from Myanmar revealed that occurring in Kanchanaburi Province Thailand represents a new herein described as angustipetalus Photikwan & Chaowasku. The differs by having fewer flowers per hook, linear (vs oblong oblong-lanceolate) petals, acute obtuse) petal apex, longer and narrower petals carpels flower. A multi-locus plastid phylogeny an accession 30 accessions other has reconstructed. results uncover well-supported clade consisting thorn-bearing Artabotrys, recovered outside this clade. To understand evolution thorns ancestral character-state reconstructions were carried out; trait inferred evolved only once Artabotrys. benefits are discussed hypothesized.Citation: E., Damthongdee A., Jongsook H. Chaowasku T. 2021: (Annonaceae), character evolutionary analyses thorn occurrence – Willdenowia 51: 69–82.Version record first published online on 23 March 2021 ahead inclusion April issue.
Language: Английский
Citations
9
Journal of Systematics and Evolution, Journal Year: 2021, Volume and Issue: 60(2), P. 237 - 252
Published: April 29, 2021
Abstract The region of Tropical Southeast Asia and the Malay Archipelago is a very appealing area for research due to its outstanding biodiversity, being one most species‐rich areas in world with high levels endemism, complex geological history. number species tribe Dissochaeteae (Melastomataceae) their tendency narrow endemism make an ideal group examining biogeographic patterns. We sampled 58 accessions spread over 42 accepted two undescribed Dissochaeteae. Two nuclear (ETS, ITS) four chloroplast regions ( ndhF , psbK‐psbL rbcL rpl16 ) were used divergence time estimation ancestral reconstruction. Results from molecular dating analysis suggest that diversity Asian resulted South American ancestor late Eocene. might have migrated America via North then entered Eurasia Atlantic land bridge during origin early diversification dates back middle Oligocene, genera originated Miocene. Indochina Borneo are likely recent common many diverging clades some within Asia.
Language: Английский
Citations
4
PhytoKeys, Journal Year: 2021, Volume and Issue: 178, P. 71 - 80
Published: May 27, 2021
Artabotrys pachypetalus sp. nov. is described from Guangdong, Guangxi, Guizhou, Hunan and Jiangxi in China. A detailed description, distribution data, along with a color plate line drawing are provided. In China, specimens representing this species were formerly misidentified as A. multiflorus or hongkongensis (= blumei ). typically has single flower per inflorescence, whereas both have multiple flowers inflorescence. addition, readily distinguished having thicker shorter petals, connivent somewhat trigonal terete inner petal blades. most similar to punctulatus because multi-flowered inflorescences length, but differs cream petals vivo , blades, short, raised rim above the claw. should be excluded flora of China none Chinese collected so far fall within variation .
Language: Английский
Citations
2