@article{fdi:010058821,
  title = {{D}elimitation of the genus {M}argaritopsis ({R}ubiaceae) in the {A}sian, {A}ustralasian and {P}acific region, based on molecular phylogenetic inference and morphology},
  author = {{B}arrab{\'e}, {L}. and {B}uerki, {S}. and {M}ouly, {A}. and {D}avis, {A}.{P}. and {M}unzinger, {J}{\'e}r{\^o}me and {M}aggia, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the past, the circumscription of the large genus {P}sychotria ({R}ubiaceae) was difficult, until molecular phylogenetic studies revealed its considerable paraphyly, enabling the delimitation of its major lineages and the grouping of related genera, and most notably the separation of {P}sychotria and its relatives (former {P}sychotrieae) into two tribes: {P}sychotrieae and {P}alicoureeae. {T}he genus {M}argaritopsis, which is included in {P}alicoureeae, encompasses 27 {N}eotropical species, and in previous studies these have been shown to be close relatives of a group of eight {P}sychotria species that occur over a large region extending from {S}outh-{E}ast {A}sia to tropical {S}outh {P}acific through {M}alesia (= the {AMP} region, defined as including {S}outh-{E}ast {A}sia, {M}alesia, tropical {A}ustralia, {M}elanesia, {M}icronesia, {N}ew {C}aledonia and {P}olynesia). {A} molecular phylogenetic study, using one nuclear {DNA} region ({ITS}) and four plastid {DNA} regions (ndh{F}, rps16, trn{H}-psb{A}, trn{T}-{F}), is undertaken in order to test the placement of 17 {AMP} {P}sychotria species within {P}alicoureeae. {T}he phylogenetic results show that they form a monophyletic clade (= clade {G}), which also includes the monotypic {F}ijian genus {R}eadea and {H}odgkinsonia frutescens from {A}ustralia. {C}lade {G} is embedded in a well-supported grade with five {N}eotropical representatives of {M}argaritopsis. {A} morphological survey based on twenty characters, with the potential to circumscribe generic entities, shows that the monophyly of clade {G} is supported by a character combination that is similar to species of {N}eotropical {M}argaritopsis, confirming their inclusion in this genus. {T}axonomic and nomenclatural work on these species is required to formalize nomenclatural implications. {B}ased on the same set of morphological characters, but in absence of molecular data, 28 other {P}sychotria species from the {AMP} region were detected as likely candidates for inclusion in {M}argaritopsis, allowing the estimation of species richness of clade {G} to be a minimum of 47 species. {W}ithin clade {G}, five well-supported subclades and a {R}eadea lineage are delimited and each of these is generally supported by unique morphological features. {P}hylogenetic topologies reveal biogeographical patterns, including a main route of dispersal from western to eastern parts of the {AMP} region, with subsequent dispersals between archipelagos in the region.},
  keywords = {biogeography ; big genera ; {M}alesia ; {M}argaritopsis ; {P}alicoureeae ; phylogeny ; {P}sychotria ; {S}outh-{E}ast {A}sia ; tropical {S}outh {P}acific ; {PACIFIQUE} ; {MALAISIE} ; {ASIE} {DU} {SUD} {EST}},
  booktitle = {},
  journal = {{T}axon},
  volume = {61},
  numero = {6},
  pages = {1251--1268},
  ISSN = {0040-0262},
  year = {2012},
  DOI = {10.1002/tax.616007},
  URL = {https://www.documentation.ird.fr/hor/fdi:010058821},
}