Taxonomy
Synonyms
Sphaerocionium lyallii (Hook.f.) Copel. • Trichomanes lyallii var. neocaledonicum C.Chr.Red List Status -
Near Threatened (NT) , assessed in 28/11/2018
Hymenophyllum neocaledonicum is an endemic saxicolus and an epyphitic fern on tree's trunck from New Caledonia. The species has a scattered distribution in the north east and the south of Grande Terre. It occurs in high altitude from 300 and 1,460 m asl. Known from nine localities, its extent of occurrence (EOO) and area of occupancy (AOO) are estimated to be 5,940 and 48 km², respectively. This species is not globally threathened except a potential threat by feral pigs (Sus scrofa) that may contribute to the decline of habitat observed at Mont Panié. Therefore, H. neocaledonicum is listed as Near Threathened (NT) close to VU B1ab (iii) + 2ab (iii).
Geographical area
Hymenophyllum neocaledonicum is endemic to New Caledonia where it has a scattered distribution in the north east and the south of Grande Terre.
Population
Population size is unknown. However field's prospections indicate a species which is not so common.
Habitat
Hymenophyllum neocaledonicum is a saxicolus and an epiphytic fern on tree's trunck which occurs in dense humid forest from 300 to 1,460 m asl.
Threats
This species is not globally threathened except a potential threat by feral pigs (Sus scrofa) that contribute to the decline of habitat observed at Mont Panié.
Conservation
Hymenophyllum mnioides is not protected by legislation however it does occur in cinq protected areas: Mont Mou, Mont Panié, Côte Oubliée, Massif du Kouakoué, Mont Do. Prospection is recommended to better estimate its distribution and threats.
Bibliography
Ebihara A.,Iwatsuki K., Ito M., Hennequin S., Dubuisson J.Y. 2007. A global molecular phylogeny of the fern genus Trichomanes (Hymenophyllaceae) with special reference to stem anatomy. Botanical Journal of the Linnean Society,(155(1)) , p.1-27.
Munzinger J., Morat Ph., Jaffré T., Gâteblé G., Pillon Y., Rouhan G., Bruy, D., Veillon J.-M., & M. Chalopin. 2019. FLORICAL: Checklist of the vascular indigenous flora of New Caledonia..
Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.
Del Rio, A. & al. 2017. Origins of the fern genus Hymenophyllum (Hymenophyllaceae) in New Caledonia: Multiple independent colonizations from surrounding territories and limited in situ diversification. Taxon(66(5)) , p.1041-1064.
Ebihara A., Dubuisson J.-Y., Iwatsuki K., Hennequin S., Ito M. 2006. A taxonomic revision of Hymenophyllaceae. Blumea(51(2)) , p.221-280.
Experts
Assessor(s): Amice, R., Butin, J., Garnier, D., Veillon, J., Fleurot, D., Laudereau, C., Suprin, B., Mandaoué, L.
Reviewer(s): Tanguy, V.
Contributor(s): Rouhan, G., Perrie, L.
Facilitator(s): Warimavute, G., Meyer, S.