Myricanthe “tontoutaensis” sp. nov. ined., {Munzinger 3418}

Red List Status -

Critically Endangered (CR) , assessed in 05/04/2018

Protected species -

in Northern Province

Myricanthe tontoutaensis is a narrowly endemic shrub to the valley of Tontouta, in the south west of Grande Terre. It is known from only a single subpopulation found in shrubland and dense humid forest on ultramafic substrate at an altitude of approximately 160 m asl. The main threats identified are uncontrolled fires and mining activities. Its area of occupancy (AOO) and extent of occurrence (EOO) are both equal to 12 km², while the species is known to exist at only a single location. Therefore, M. tontoutaensis is listed as Critically Endangered (CR) under criteria B1ab(ii,iii,v) with a continuing decline of all the concerned sub-criteria.

Geographical area

M. tontoutaensis is an endemic species of New Caledonia, where it is only known from the Toutouta valley in the south west of Grande Terre.


Population size is unknown.


M. tontoutaensis occurs in shrubland on ultramafic substrate at an altitude of approximately 160 m asl.


The main threats identified are most importantly uncontrolled fires then indirectly mining impacts of Vulcain (SMGM).


M. tontoutaensis is not protected by legislation in New Caledonia and it does not occur in a protected area. This species should be included in the regional legislation for a better protection of the species. This species would benefit from ex situ and in situ emergency conservation actions and also awarness amongs the local population. It is proposed to ensure the follow-up of the only known subpopulation and to preserve a viable population on delimited perimeters. It is also recommended to inform the DSCGR (emergency services), responsible for the coordination of the firefighting effort, on the presence of the species in the concerned area. Plus prospection is recommendaed to assess the number of individuals in Tontouta Valley.


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.

McPherson G.D & Tirel C. 1987. Flore de la Nouvelle-Calédonie et dépendances. Volume 14: Euphorbiaceae I. 2016. Faune et Flore de Nouvelle-Calédonie.


Assessor(s): Amice, R., Bruy, D., Butin, J., Cazé, H., Chambrey, C., Dumontet, V., Fleurot, D., Garnier, D., Gâteblé, G., Goxe, J., Hequet, V., Veillon, J.

Reviewer(s): Lannuzel, G.

Facilitator(s): Meyer, S., Barrabé, L., Warimavute, G.

Geographical distribution