02488nas a2200181 4500008004100000245012600041210006900167300001200236490000800248520179400256100001902050700002402069700001802093700001602111700002302127700001402150856014202164 2015 eng d00aMorphology, molecular phylogenetics and biogeography of Impatiens akomensis (Balsaminaceae), a new species from Cameroon.0 aMorphology molecular phylogenetics and biogeography of Impatiens a397-4080 v1483 a

Background and aims – A recent field expedition in the Campo-Ma’an/Akom II region in Cameroon
resulted in the collection of a previously unknown Impatiens species, which resembles Impatiens macroptera
and Impatiens pseudomacroptera. This study aims to describe and infer the evolutionary history of this
novelty by using phylogenetics, biogeographic inference and dating estimation analyses.
Methods – The new species was subject to a palynological, molecular phylogenetic and biogeographical
analysis. In addition, a thorough morphological comparison with its closely related species was conducted.
Key results – Morphological comparison and molecular phylogenetics corroborate its status as a new
species, which is given the name Impatiens akomensis. Molecular data, based on ImpDEF1, ImpDEF2 and
ITS indicate that Impatiens akomensis is most closely related to the Cameroonian I. macroptera, whereas
the lineage towards I. macroptera and the novelty is sister to the Gabonese I. pseudomacroptera. Impatiens
akomensis differs from I. macroptera and I. pseudomacroptera in having very strongly asymmetric white
flowers, much thicker leaves, a narrowly elliptic leaf shape and a serrulate leaf margin, smaller lateral
united petals (23.1–24.2 mm) and larger bracts (12–20 mm). The new species qualifies for endangered
status under IUCN criteria B2 and probably B1.
Conclusions – Dating analyses in combination with biogeographic inference, and ecological and
environmental interpretation of the novelty and its closely related species allows us to infer the putative
evolutionary history of Impatiens akomensis

1 aJanssens, S.B.1 aSonké, Bonaventure1 aLachenaud, O.1 aLemaire, B.1 aSimo-Droissart, M.1 aSmets, E. uhttps://rubiaceae-africa.myspecies.info/content/morphology-molecular-phylogenetics-and-biogeography-impatiens-akomensis-balsaminaceae-new02329nas a2200145 4500008004100000245008400041210006900125300001200194490000800206520178900214100001802003700001502021700002702036856012002063 2017 eng d00aTaxonomic revision of the African genera Brieya and Piptostigma (Annonaceae). 0 aTaxonomic revision of the African genera Brieya and Piptostigma  a173-2160 v1503 a

Background and aims – Annonaceae are an important family in tropical rain forests of Africa. Here, we
present a revision of the west-central African genus Piptostigma of the tribe Piptostigmateae. Previous
molecular phylogenetic analyses of Piptostigmateae have revealed that the genus as currently circumscribed
is paraphyletic. The aims of the article are: (1) to clarify the generic delimitation of the genus Piptostigma,
especially in relation to its current polyphyletic delimitation; (2) to provide a new updated key to the genera
of tribe Piptostigmateae; and (3) to provide for the first time in over 100 years a complete taxonomic
revision of genera Brieya and Piptostigma.
Material and methods – Normal practices of herbarium taxonomy were used for the morphological study
of about 200 specimens from B, BR, BRLU, G, HBG, K, L, LBV, LISC, MO, P, U, US, WAG, YA and
Z. We sequenced three plastid regions for 32 samples representing 26 ingroup (Piptostigmateae) and six
outgroup species in order to explore the paraphyly of Piptostisma. The open source software QGis was
used to generate the distribution maps of the species and their conservation status was obtained using the
IUCN categories and criteria.
Key results – Molecular and morphological evidence support the reinstatement of the genus Brieya De
Wild. Three keys are presented, one to the genera of Piptostigmateae and the two others to the species of
Brieya and Piptostigma. A total of thirteen species are described for Piptostigma and two for the genus
Brieya. Four new species are presented for the genus Piptostigma: P. macrophyllum, P. mayndongtsaeanum,

1 aGhogue, J.-P.1 aSonké, B.1 aThomas, L.P., Couvreur uhttps://rubiaceae-africa.myspecies.info/content/taxonomic-revision-african-genera-brieya-and-piptostigma-annonaceae39698nas 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-south