Publications des scientifiques de l'IRD

Swenson U., Nylander J. A. A., Munzinger Jérôme. (2018). Phylogeny, species delimitation and revision of Pleioluma (Sapotaceae) in New Caledonia, a frequently gynodioecious genus. Australian Systematic Botany, 31 (2), p. 120-165. ISSN 1030-1887.

Titre du document
Phylogeny, species delimitation and revision of Pleioluma (Sapotaceae) in New Caledonia, a frequently gynodioecious genus
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000431645900002
Auteurs
Swenson U., Nylander J. A. A., Munzinger Jérôme
Source
Australian Systematic Botany, 2018, 31 (2), p. 120-165 ISSN 1030-1887
Pleioluma (Baill.) Baehni (Sapotaceae) circumscribes some 40 medium-sized trees and shrubs, many gynodioecious, in Australia, Malesia and New Caledonia. Systematics of the group is unclear and delimitations of species are notoriously difficult. We explore species boundaries in New Caledonia by multiple accessions of 'species', molecules and morphology in a Bayesian framework. The molecular phylogenetic signal is weak, but morphology provides enough information to support groups, species and recognition of one cryptic species. Pleioluma is then revised for New Caledonia, a genus distinguished by areolate higher leaf venation, sepals being pubescent on both surfaces, stamens inserted in or below the middle of the corolla tube, presence of staminodes, foliaceous cotyledons and endosperm. Seventeen endemic species are recognised with descriptions, recognition notes, distributions, etymologies and conservation assessments. Six species are described as new, of which four are assigned IUCN preliminary status as Critically Endangered and in urgent need of protection (Pleioluma acutifolia Swenson & Munzinger, P. belepensis Swenson & Munzinger, P. butinii Swenson & Munzinger and P. tchingouensis Swenson & Munzinger). The new species, P. dioica Swenson & Munzinger and P. tenuipedicellata Swenson & Munzinger are respectively assessed as Data Deficient and Vulnerable. The micro-endemic species P. vieillardii (Baill.) Swenson & Munzinger, confined to the Koniambo massif, is also critically endangered and needs urgent conservation management.
Plan de classement
Sciences du monde végétal [076]
Description Géographique
NOUVELLE CALEDONIE
Localisation
Fonds IRD [F B010072830]
Identifiant IRD
fdi:010072830
Contact