| 1. |
- Banag, Cecilia I., et al.
(author)
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Ixora (Rubiaceae) on the Philippines - crossroad or cradle?
- 2017
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In: BMC Evolutionary Biology. - : Springer Science and Business Media LLC. - 1471-2148. ; 17
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Journal article (peer-reviewed)abstract
- Background: The Philippine archipelago is globally one of the most important model island systems for studying evolutionary processes. However, most plant species on this archipelago have not yet been studied in sufficient detail. The main aim of this study is to unravel the evolutionary history and biogeographic relationships of the Philippine members of the pantropical genus Ixora. Results: The complex plastid and nuclear divergence patterns in Philippine Ixora, documented using tree and network approaches, reveal a highly dynamic evolution in Ixora, involving several phases of radiation and recolonization. Philippine Ixora comprises at least five lineages, of which one is most closely related to species from Wallacea, and the remaining four to species from Asia. Conclusions: Our study highlights the importance of Philippine species for understanding phytogeographic patterns in the Indomalayan-Australasian eco-region. The overall genetic differentiation, as well as the incongruence between genealogies based on the biparentally inherited nucleome and the maternally inherited plastome in Ixora, reflect the complex tectonic history of the Philippine archipelago. The Ixora lineage related to Wallacean species supports the delimitation of different ecozones along Huxley's line, because it is absent from Palawan. The remaining four lineages are all allied with Asian taxa, reflecting several waves of colonization. Close relationships between some widespread Philippine species and locally adapted narrow endemics suggest that the widespread, genetically diverse species act as pools for the formation of new species in a process of ongoing speciation. Our results suggest that the species concepts of some of the more widespread taxa need to be revised.
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| 2. |
- Kainulainen, Kent, 1978-, et al.
(author)
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Molecular phylogenetic analysis of the tribe Alberteae (Rubiaceae), with description of a new genus, Razafimandimbisonia
- 2009
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In: Taxon. - Wien : International Association for Plant Taxonomy. - 0040-0262 .- 1996-8175. ; 58:3, s. 757-768
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Journal article (peer-reviewed)abstract
- The tribe Alberteae, presently classified in the subfamily Ixoroideae (Rubiaceae), has historically been an artificial grouping of genera. In the present study, phylogenetic analyses of the chloroplast DNA markers rbcL, ndhF, trnS-G, trnT-F and trnH-psbA as well as the ITS region of the nuclear ribosomal DNA, are done to assess the delimitation of Alberteae. The resulting phylogenetic hypothesis is highly resolved, with most clades strongly supported. The genus Alberta is found to be paraphyletic as presently circumscribed. As a consequence, we propose the new genus Razafimandimbisonia Kainul. & B. Bremer to accommodate the Malagasy species. The newly delimited Alberta is distinguished by having two calycophylls that expand after anthesis as well as awl-shaped stigma lobes. Razafimandimbisonia is distinguished from the remaining Alberteae by having dehiscent fruits and anthers without basal appendages. We demonstrate that the genera Airosperma, Boholia and Crossopteryx are not associated with Alberteae, as has previously been suggested. Alberteae is considered restricted to the genus Alberta endemic to Southeast Africa, and the two Malagasy endemic genera Nematostylis and Razafimandimbisonia.
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| 3. |
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| 4. |
- Lantz, Henrik, et al.
(author)
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Three new species of Vanguerieae (Rubiaceae) from Madagascar
- 2007
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In: Adansonia. - 1280-8571 .- 1639-4798. ; 29:1, s. 129-136
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Journal article (peer-reviewed)abstract
- Three new species of the tribe Vanguerieae (Rubiaceae) from Madagascar aredescribed with illustrations. Two species are placed in Pyrostria, one in Peponi-dium. Peponidium crassifolium is recognized by its thick and slightly succulentleaves, Pyrostria pendula by the pendulous flowers and persistent pedicels, andPyrostria serpentina by a serpentine habit and small leaves. The morphology andtaxonomic history of the dioecious genera of the tribe are discussed.
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| 5. |
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| 6. |
- Mouly, Arnaud, et al.
(author)
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A new species of Coptosperma (Rubiaceae) from the Comoro Islands and Madagascar
- 2008
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In: Systematics and Geography of Plants. - 1374-7886. ; 78, s. 145-154
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Journal article (peer-reviewed)abstract
- In the Comoro Islands, Rubiaceae are one of the largest families of flowering plants, represented by c. twenty genera and seventy species. Among these genera, Coptosperma (Pavetteae, Ixoroideae) is represented by two widely distributed species, also occurring in Madagascar andcontinental Africa, and a third species new to science. Coptosperma mitochondrioides Mouly & De Block possesses large stipules of the “bec de canard” type and ribbed fruits. While this type of stipule is typical for many Malagasy Coptosperma species, ribbed fruits are very rare within the genus. Within the Comoros archipelago C. mitochondrioides is restricted to Mayotte, but the species is also known from northern Madagascar. The new species is described and illustrated and a key to the species of Coptosperma occurring in the Comoros is provided.
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| 7. |
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| 8. |
- Mouly, Arnaud, et al.
(author)
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Paederia ntiti sp nov (Rubiaceae) from the Comoros and notes on the affinities of Comorian rubiaceous climbers and lianas
- 2010
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In: Nordic Journal of Botany. - : Wiley. - 0107-055X .- 1756-1051. ; 28:3, s. 262-266
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Journal article (peer-reviewed)abstract
- A new species of Paederia L. (Rubiaceae, Rubioideae, Paederieae), P. ntiti Mouly & Puff, endemic to the Comoros (Grande Comore, Anjouan and Mayotte) and occurring in natural elevated forests is described and illustrated. Its conservation status is evaluated and the species is rated 'Endangered' (EN). A key to the Paederia taxa of the Comorian archipelago is provided. Also included are notes on the three other species of rubiaceous climbers and lianas known from the Comoros: Paederia bojeriana (A. Rich. ex DC.) Drake, Danais comorensis Drake and Uncaria africana G. Don.
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| 9. |
- Mouly, Arnaud, et al.
(author)
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Paraphyly of Ixora and new tribal delimitation of Ixoreae (Rubiaceae): Inference from combined chloroplast (rps16, rbcL and trnT-F) sequence data
- 2009
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In: Annals of the Missouri Botanical Garden. ; 96, s. 146-160
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Journal article (peer-reviewed)abstract
- We performed phylogenetic analyses of DNA sequences of three chloroplast markers: rbcL, rps16, and trnT-F, to rigorously test the monophyly of competing circumscriptions of the tribe Ixoreae. Several genera traditionally or currently associated with the type genus Ixora L. were included in the analyses. Ixora as currently circumscribed appears paraphyletic, as many other genera are nested within it with strong support: Captaincookia N. Halle´, Doricera Verdc., Hitoa Nadeaud, Myonima Comm. ex Juss., Sideroxyloides Jacq., Thouarsiora Homolle ex Are`nes, and Versteegia Valeton. Further, Aleisanthia Ridl., Aleisanthiopsis Tange, and Greenea Wight & Arn. are more closely related to Ixora and allies than the monotypic genus Scyphiphora C. F. Gaertn. Consequently, Ixoreae fide Andreasen and Bremer (2000) is not monophyletic without an exclusion of Scyphiphora. Ixoreae fide Robbrecht and Manen (2006) is not monophyletic unless Captaincookia and Doricera are included. The monophyly of a morphologically heterogeneous Ixoreae alliance consisting of Ixora and its relatives Aleisanthia, Aleisanthiopsis, and Greenea is, however, strongly supported. In order to recognize monophyletic and morphologically consistent groups, we adopt a narrow circumscription of Ixoreae (including Bemsetia Raf., Captaincookia, Charpentiera Vieill., Doricera, Hitoa, Ixora, Myonima, Pancheria Montrouz., Sideroxyloides, Thouarsiora, Tsiangia But, H. H. Hsue & P. T. Li, and Versteegia), and two new tribes are erected for Aleisanthia + Aleisanthiopsis and Greenea, respectively. The Indo-Malesian Aleisanthieae and the pantropical Ixoreae s. str. are sister groups, and the Southeast Asian Greeneeae is sister to the Ixoreae–Aleisanthieae clade.
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