Taxonomy
Red List Status -
Vulnerable (VU) , assessed in 07/04/2017Sphenostemon thibaudii is an endemic shrub of New Caledonia, restricted to the Panié massif in northern Grande Terre. It occurs in dense humid forest on volcano-sedimentary substrate at an altitudinal range 600-900 m asl. This species does not seem directly threatened but invasive species (rusa deer (Rusa timorensis), feral pig) impact other areas of the massif. Its area of occupancy (AOO) being estimated to 8 km² but probably slightly more, Sphenostemon thibaudii is assessed as Vulnerable (VU) with criteria D2 with the possibility that the progress of invasive species could rapidly drive the species to CR.
Geographical area
Sphenostemon thibaudii is an endemic shrub of New Caledonia, restricted to the Panié massif in northern Grande Terre.
Population
It is known of the east and west slopes of Mont Panié (2 subpopulations).
Habitat
It occurs in dense humid forest on volcano-sedimentary substrate at an altitudinal range 600-900 m asl.
Threats
This species does not seem directly threatened but invasive species (rusa deer (Rusa timorensis), feral pig) impact other areas of the massif.
Conservation
Unprotected by legislation, this species occurs in one protected area: Mont Panié. Invasive species should be monitored.
Bibliography
Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.
Jérémie, J.; Hoff, M.; Jonsell, B. 1997. Flore de la Nouvelle-Calédonie et dépendances. Volume 21 : Sphenostemonaceae, Anacardiaceae, Cruciferae.
Morat, P.; Jaffré, T.; Tronchet, F.; Munzinger, J.; Pillon, Y.; Veillon, J.-M. and Chalopin, M. 2012. Le référentiel taxonomique Florical et les caractéristiques de la flore vasculaire indigène de la Nouvelle-Calédonie [The taxonomic database « FLORICAL » and characteristics of the indigenous flora of New Caledonia]. Adansonia sér 3(34) , p.177-219.
Munzinger J., Morat Ph., Jaffré T., Gâteblé G., Pillon Y., Tronchet F., Veillon J.-M. and M. Chalopin 2016. FLORICAL: Checklist of the vascular indigenous flora of New Caledonia. vers. 22.IV.2016.
Experts
Assessor(s): Veillon, J., Amice, R., Bruy, D., Butin, J., Fleurot, D., Garnier, D., Gâteblé, G., Goxe, J., Suprin, B.
Reviewer(s): Pillon, Y.
Facilitator(s): Maura, J., Tanguy, V., Warimavute, G.