01728nas a2200169 4500008004100000245014500041210007100186300001200257490000800269520102800277100002301305700002301328700001601351700001601367700002401383856015101407 2013 eng d00aTaxonomy and phylogenetics of Cuviera (Rubiaceae–Vanguerieae) and reinstatement of Globulostylis with the description of three new species0 aTaxonomy and phylogenetics of Cuviera Rubiaceae–Vanguerieae and  a407-4410 v1733 a

Generic circumscriptions in tribe Vanguerieae (Rubiaceae) have been under discussion for a long time. Recent
molecular studies, while providing new insights, have not yet solved all the problems. In this study, the taxonomy
and phylogenetics of the genus Cuviera s.l. are investigated. On the basis of molecular and morphological evidence,
Cuviera is restricted to a group of ten West and Central African species. Globulostylis, previously included in
Cuviera, is reinstated as a distinct genus, with eight species from Central Africa. Both genera are revised; the
latter includes three new species (G. dewildeana, G. rammelooana and G. robbrechtiana) and two new combinations
(G. leniochlamys and G. uncinula). The close relationship of Cuviera s.s. and Globulostylis to Vangueriella is
shown. Six aberrant species (most from East Africa) are excluded from Cuviera, but further work is needed before
they can be confidently assigned to other genera.

1 aVerstraete, Brecht1 aLachenaud, Olivier1 aSmets, Erik1 aDessein, S.1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/taxonomy-and-phylogenetics-cuviera-rubiaceae%E2%80%93vanguerieae-and-reinstatement-globulostylis-001542nas a2200133 4500008004100000245009800041210006900139300001200208490000700220520097600227100002301203700002401226856015801250 2015 eng d00aLe genre Oxyanthus (Rubiaceae) en Afrique de l’Ouest: description d’une nouvelle espèce.0 aLe genre Oxyanthus Rubiaceae en Afrique de l Ouest description d a241-2470 v703 a

A new species, Oxyanthus andjigae Sonké & O. Lachenaud (Rubiaceae), from Ivory Coast and Sierra Leone, is described
and illustrated. It is closely related to Oxyanthus racemosus (Schumach. & Thonn.) Keay and Oxyanthus setosus Keay, and
was previously confused with the latter species; however, it differs from both in the longer corolla tube (18-19.5 cm vs
(7-)11-15.5 cm) and the longer hairs on the twigs (1.5-2 mm long vs. ≤ 1 mm in Oxyanthus setosus and ≤ 0.5 mm in
Oxyanthus racemosus). From Oxyanthus setosus it is also separated by the distribution, the latter species occuring from
Nigeria to Gabon. The species is assessed as “Endangered” following IUCN Categories and Criteria. A new identification
key to West African species of Oxyanthus DC. is presented; Oxyanthus oliganthus K. Schum. is newly reported from
Côte d’Ivoire and Ghana.
 

1 aLachenaud, Olivier1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/le-genre-oxyanthus-rubiaceae-en-afrique-de-l%E2%80%99ouest-description-d%E2%80%99une-nouvelle-esp%C3%A8ce02356nas a2200193 4500008004100000245012200041210006900163300001200232490000800244520161100252100001801863700002701881700002401908700002101932700002301953700002301976700002001999856014302019 2016 eng d00aPhylogenetics of tribe Sabiceeae (Ixoroideae, Rubiaceae) revisited, with a new subgeneric classification for Sabicea.0 aPhylogenetics of tribe Sabiceeae Ixoroideae Rubiaceae revisited  a551-5800 v1823 a

Tribe Sabiceeae (Ixoroideae, Rubiaceae) has undergone recent taxonomical changes with the incorporation of the
related genera Ecpoma, Pseudosabicea and Stipularia into the type genus Sabicea. We use phylogenetic analysis
and morphological data to verify the relationships among members of the tribe, including the most
comprehensive taxon sampling of the tribe to date with 74 of 145 species. Sequence data from the nuclear
internal transcribed spacer (ITS) and three plastid markers (petD, rps16, trnT–F) were used to infer relationships
among the members of the tribe. Individual analyses using maximum likelihood, parsimony and Bayesian
approaches reveal several supported clades: the former genus Stipularia is resolved as a monophyletic unit, but
Ecpoma is monophyletic only if Sabicea urbaniana and Sabicea xanthotricha are included (corresponding to
Sabicea subgenus Stipulariopsis sensu Wernham). Pseudosabicea is biphyletic, with one clade corresponding to
section Anisophyllae of Halle (1964) and the other one to the other sections (Floribundae and Sphaericae) of the
genus. Eleven morphological characteristics were recorded for all species studied and seven have been mapped
onto the phylogenetic tree to study their evolution in the group and assess their value for the classification of
Sabicea s.l. Finally, our study shows that a combination of diagnostic characteristics should be used to
differentiate each group and we propose to recognise four subgenera in Sabicea.

1 aZemagho, Lise1 aLiede-Schumann, Sigrid1 aSonké, Bonaventure1 aJanssens, Steven1 aLachenaud, Olivier1 aVerstraete, Brecht1 aDessein, Steven uhttps://rubiaceae-africa.myspecies.info/content/phylogenetics-tribe-sabiceeae-ixoroideae-rubiaceae-revisited-new-subgeneric-classification39698nas a2200325 45000080041000002450113000412100069001543000009002234900008002325203860200240653001738842653002338859653002538882653003138907653001638938653001238954653001438966653002238980100002339002700002339025700001839048700002039066700002139086700003039107700002939137700002039166700002239186700002439208856014039232 2019 eng d00aMine versus Wild: a plant conservation checklist of the rich Iron-Ore Ngovayang Massif Area (South Cameroon)0 aMine versus Wild a plant conservation checklist of the rich Iron a8-290 v1523 a

16.00 Normal 0 21 false false false FR-BE X-NONE X-NONE

Background and aims – The rapid expansion of human activities in South Cameroon, particularly mining in mountainous areas, threatens this region’s exceptional biodiversity. To comprehend the effects of land-use change on plant diversity and identify conservation priorities, we aim at providing a first comprehensive plant checklist of the Ngovayang Massif, focusing on the two richest plant families, Orchidaceae and Rubiaceae.

Location – The Ngovayang Massif Area (NMA) is located in the South Region of Cameroon. It is covered by lowland and submontane rainforest (100 to 1110 m elevation).

Methods – We compiled a dataset of 6116 georeferenced herbarium specimens, of which 2787 belong to Rubiaceae and Orchidaceae. We used rarefaction methods to explore sampling and diversity patterns, and investigated the altitudinal distribution of rare and/or threatened taxa.

Key results – The NMA, which houses about 1500 vascular plant taxa, is the richest documented area for Rubiaceae in Atlantic Central Africa (ACA) and the fifth for Orchidaceae, with respectively 281 and 111 taxa. Among these taxa, 178 (45%) are endemic to ACA and 67 (17%) are considered globally threatened according to IUCN categories and criteria. We show that higher elevation areas (> 750 m), which are also the main areas targeted for mining, are the richest in endangered and/or rare species. Three new records for Cameroon are reported here.

Conclusion – The NMA represents an Important Plant Area of Cameroon as confirmed by its exceptional plant diversity (> 20% of the total Flora of Cameroon), by the concentration of many threatened and/or restricted range species (10 taxa are strict endemics of the massif) as well as by the threat on rare habitats (i.e. the submontane vegetation above ~750 m elevation). A management plan involving in situ and ex situ conservation actions is urgently needed to reduce the potential threats of future mining activities.

10aBiodiversity10aendangered species10aImportant Plant Area10airon and gold exploitation10anew records10aorchids10aRubiaceae10asubmontane forest1 aDroissart, Vincent1 aLachenaud, Olivier1 aDauby, Gilles1 aDessein, Steven1 aKamdem, Gyslène1 aK., Charlemagne, Nguembou1 aSimo-Droissart, Murielle1 aStévart, Tariq1 aTaedoumg, Hermann1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/mine-versus-wild-plant-conservation-checklist-rich-iron-ore-ngovayang-massif-area-south38768nas a2200277 45000080041000002450103000412100069001442600021002133000012002344900007002465203791300253653001138166653001338177653002238190653001038212653001038222653001238232653001638244653001438260653001238274653001338286100001838299700002338317700002438340856012638364 2018 eng d00aFour new species of Sabicea (Rubiaceae) from tropical Africa, with additional notes on the genus. 0 aFour new species of Sabicea Rubiaceae from tropical Africa with  c23 November 2018 a277-2930 v733 a

Four new species of Sabicea (Rubiaceae) from tropical Africa are described and illustrated: S. desseinii from Cameroon, Gabon and Equatorial Guinea, S. ezangae from Gabon, S. jongkindii from Liberia and Ghana, and S. uniflora from Gabon. Their affinities are discussed, and the conservation status of each species is assessed. Sabicea speciosissima K.Schum. is excluded from the genus and synonymised with Rothmannia octomera (Hook.) Fagerl. Three other species are sunk into synonymy:  Sabicea gigantea Wernham with S. dewevrei De Wild., S. arachnoidea Hutch. & Dalziel with S. discolor Stapf, and S. neglecta Hepper with S. speciosa K.Schum.

10aAfrica10aCameroon10aEquatorial Guinea10aGabon10aGhana10aLiberia10anew species10aRubiaceae10aSabicea10ataxonomy1 aZemagho, Lise1 aLachenaud, Olivier1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/four-new-species-sabicea-rubiaceae-tropical-africa-additional-notes-genus