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A liana with a red exudate belonging to the Fabaceae family had been collected and attributed on a morphological basis to the genus Oxyrhynchus, which had never been reported in New Caledonia. The plant was sequenced (ITS) and its attribution to the genus Oxyrhynchus was confirmed. Morphological characters were then used to show that it differed from all previously known species, and that it was therefore a new species, which is described. The plant is known from just one locality and seven individuals; we assign it a preliminary status of Critically Endangered (CR).
Novitates neocaledonicae XVI: Oxyrhynchus margueriteae sp. nov. (Fabaceae), une espèce nouvelle endémique de Nouvelle-Calédonie, et le premier enregistrrement du genre sur le territoire.
Une liane à exsudat rouge appartenant à la famille des Fabaceae avait été récoltée et attribuée sur une base morphologique au genre Oxyrhynchus qui n′avait jamais été signalé en Nouvelle-Calédonie. La plante a été séquencée (ITS) et son attribution au genre Oxyrhynchus a été confirmée. Les caractères morphologiques ont ensuite permis de montrer qu′elle se différencie de toutes les espèces déjà connues, et donc qu′il s′agit d′une espèce nouvelle, qui est décrite. La plante n′est connue que d′une seule localité et de sept individus; nous lui attribuons donc un statut préliminaire en danger critique d′extinction (CR).
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