Cyclophyllum deplanchei is an endemic shrub from New Caledonia. It is restricted to Koniambo region. It occurs in “maquis minier”, on serpentinite substrate at low altitudinal range (20-200 m asl.). The main threats are mainly linked to frequent bushfires. Some subpopulations can also be impacted indirectly by mining activities at Koniambo massif (road constructions, soil erosions). Furthermore the Vavouto subpopulations of Vavouto may have dissapear due to urbanisation (road constructions, houses, road embakment. Its extent of occurrence (EOO) and area of occupancy (AOO) are respectively estimated to be of 125 km² and 60 km² while the number of locations is estimated to be four. Using criterion B and with the estimation of a continuous decline of its habitat quality, AOO and number of mature individuals, Cyclophyllum deplanche is assessed as Endangered (EN) B1ab (i,ii,iii,vi,v)+2ab(i,ii,iii,vi,v).

Geographical area

Cyclophyllum deplanchei is endemic to New Caledonia where it is restricted to Koniambo region, in the north west of Grande Terre.

Population

The population size is not known.

Habitat

This species occurs in “maquis minier”, on serpentinite substrate at low altitudinal range (20 -200 m asl.).

Threats

The main threats are mainly linked to frequent bushfires. Some subpopulations can also be impacted indirectly by mining activities at Koniambo massif (road constructions, soil erosions).

Conservation

Cyclophyllum deplanchei is not protected by legislation in New Caledonia and it does not occur in any protected area. It is recommended to inform the DSCGR (emergency services) on the presence of the species in the concerned areas.

Bibliography

Mouly A. & Jeanson M. 2015. Specialization to ultramafic substrates and narrow endemism of Cyclophyllum (Rubiaceae) in New Caledonia: contribution of novel species to the understanding of these singular patterns. Acta Botanica Gallica(162) , p.173-189.

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.

Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.

Munzinger J., Morat Ph., Jaffré T., Gâteblé G., Pillon Y., Rouhan G., Bruy, D., Veillon J.-M., & M. Chalopin 2020. FLORICAL: Checklist of the vascular indigenous flora of New Caledonia [continuously updated].

Experts

Assessor(s): Amice, R., Bruy, D., Cazé, H., Fleurot, D., Garnier, D., Héquet, V., Lagrange, A., Lannuzel, G., Laudereau, C., McCoy, S., Vandrot, H.

Reviewer(s): Pillon, Y.

Facilitator(s): Fourdrain, A., Warimavute, G.