Publications des scientifiques de l'IRD

Couvreur Thomas, Niangadouma R., Sonké B., Sauquet H. (2015). Sirdavidia, an extroardinary new genus of Annonaceae from Gabon. PhytoKeys, 46, p. 1-19. ISSN 1314-2011.

Titre du document
Sirdavidia, an extroardinary new genus of Annonaceae from Gabon
Année de publication
2015
Type de document
Article référencé dans le Web of Science WOS:000351791200001
Auteurs
Couvreur Thomas, Niangadouma R., Sonké B., Sauquet H.
Source
PhytoKeys, 2015, 46, p. 1-19 ISSN 1314-2011
A distinctive new monotypic genus from Gabon is described in the tropical plant family Annonaceae: Sirdavidia, in honor to Sir David Attenborough. Molecular phylogenetic analyses confirm that Sirdavidia, which is very distinct from a morphological standpoint, is not nested in any existing genus of Annonaceae and belongs to tribe Piptostigmateae (subfamily Malmeoideae), which now contains a total of six genera. The genus is characterized by long acuminate leaves, fully reflexed red petals, 16-19 bright yellow, loosely arranged stamens forming a cone, and a single carpel topped by a conspicuous stigma. With just three known collections, a preliminary IUCN conservation status assessment is provided as ?endangered? as well as a distribution map. The discovery of Sirdavidia is remarkable at several levels. First, it was collected near the road in one of the botanically best-known regions of Gabon: Monts de Cristal National Park. Second, its sister group is the genus Mwasumbia, also monotypic, endemic to a small area in a forest in Tanzania, some 3000 km away. Finally, the floral morphology is highly suggestive of a buzz pollination syndrome. If confirmed, this would be the first documentation of such a pollination syndrome in Magnoliidae and early-diverging angiosperms in general.
Plan de classement
Taxonomie [076BOTA01]
Descripteurs
PLANTE SAUVAGE ; FORET DENSE ; GENRE NOUVEAU ; ESPECE NOUVELLE ; PHYLOGENIE ; ANATOMIE VEGETALE ; DIAGNOSE ; PHENOLOGIE ; SPECIMEN TYPE ; POLLINISATION
Description Géographique
GABON
Localisation
Fonds IRD [F B010063340]
Identifiant IRD
fdi:010063340
Contact