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Ormocarpopsis anosyana Thulin & Razafim. (Fabaceae), a new species from southern Madagascar and its phylogenetic position
Systematic Biology, Department of Organismal Biology, EBC, Uppsala University, Norbyvägen 18D, SE-752 36 Uppsala, Sweden.
Swedish Museum of Natural History, Department of Botany.ORCID iD: 0000-0003-2954-7029
2016 (English)In: Candollea, ISSN 0373-2967, Vol. 71, no 2, 281-286 p.Article in journal (Refereed) Published
Abstract [en]

Ormocarpopsis anosyana Thulin & Razafim. (Fabaceae), a new species from the Anosy Region of south-eastern Madagascar, is described and illustrated. According to phylogenetic analyses based on nuclear ribosomal ITS sequences, the new species is, with strong support, sister to Ormocarpopsis mandrarensis Dumaz-le-Grand, another species confined to southeastern Madagascar. Ormocarpopsis anosyana differs markedly from Ormocarpopsis mandrarensis by its generally smaller leaflets with the secondary and tertiary venation drying more or less blackish beneath, by its shorter hypanthium, by its smaller calyx with the lowest tooth about as long as the others, by its wing-petals that are much longer than the keel, by its glabrous ovary, and by its slightly articulated fruits. Ormocarpopsis anosyana is known only from two collections from a single patch of spiny dry forest east of Imonty. It is assigned a preliminary conservation status as “Endangered”.

Abstract [fr]

Ormocarpopsis anosyana Thulin & Razafim. (Fabaceae), une nouvelle espèce de la Région Anosy au sud-est de Madagascar, est décrite et illustrée. D'après des analyses phylogénétiques basées sur des séquences nucléaires ribosomiques d'ITS, la nouvelle espèce est l'espèce soeur d'Ormocarpopsis mandrarensis Dumaz-le-Grand, une autre espèce confinée au sud-est de Madagascar. Ormocarpopsis anosyana diffère nettement d'Ormocarpopsis mandrarensis par ses folioles généralement plus petites avec des nervures secondaires et tertiaires plus ou moins noirâtres en dessous après séchage, par son hypanthium plus court, par son plus petit calice avec la dent inférieure à peu près aussi longue que les autres, par ses ailes beaucoup plus longs que la carène, par son ovaire glabre, et par ses fruits légèrement articulés. Ormocarpopsis anosyana est connue uniquement de deux collections d'un fragment de forêt sèche à épineux à l'est d'Imonty. Il lui a été assigné le statut de conservation préliminaire «En Danger».

Place, publisher, year, edition, pages
Geneva: The Conservatory and Botanical Garden of the City of Geneva (CJBG) , 2016. Vol. 71, no 2, 281-286 p.
Keyword [en]
FABACEAE, Ormocarpopsis, Madagascar, Anosy, Taxonomy, Phylogeny
National Category
Biological Systematics
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-1893DOI: 10.15553/c2016v712a13OAI: oai:DiVA.org:nrm-1893DiVA: diva2:1045894
Available from: 2016-11-11 Created: 2016-11-11 Last updated: 2016-12-20Bibliographically approved

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