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-new01437nas a2200157 4500008004100000245015700041210006900198520076700267100002301034700001701057700001501074700001501089700001501104700001801119856014201137 2018 eng d00aNew taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa.0 aNew taxonomic and conservation status of Ossiculum Vandeae Orchi3 a

In the context of producing a revised phylogenetic Linnean taxonomy of angraecoid orchids, the monotypic
and narrow-endemic genus Ossiculum is synonymised with Calyptrochilum. Accordingly, a new combination
in Calyptrochilum is proposed for Ossiculum aurantiacum. The morphological and DNA-based
evidence for this transfer is discussed. Moreover, Calyptrochilum aurantiacum is here firstly reported outside
Cameroon, with a record from the Republic of the Congo. The Red List conservation status of this
species is reassessed and it is to be downgraded from “Critically Endangered” (CR) to “Endangered” (EN),
following the recent discovery of additional subpopulations in Cameroon.

1 aSimo-Droissart, M.1 aStévart, T.1 aSonké, B.1 aMayogo, S.1 aKamdem, N.1 aDroissart, V. uhttps://rubiaceae-africa.myspecies.info/content/new-taxonomic-and-conservation-status-ossiculum-vandeae-orchidaceae-highly-threatened-and