Assessed as Nivatogastrium lignicola and as Clavogaster sp ‘whakakpapa’
Assessed as Nivatogastrium lignicola there is a single collection made in 1968 and the fungus has not be collected since so it must be considered extinct.
Assessed as Clavogaster sp ‘whakapapa’ we have up to 6 collections made in three widely separated localities, one of which is 50 years old and may thus be disregarded. The substrate of this fungus seems to be very widely distributed and the forests in which it grows have been widely surveyed so it is not understood why it is not more widely distributed. We nevertheless think it would be reasonable to assume that there might be up to × 10 more sites to be discovered. That would yield a population of 200 mature individuals (5 functional individuals ×2 × 20 sites) on 20 sites, That suggests the species is endangered under B2a & b and D1.
Nivatogastrium lignicola Horak
Redhead (2014) transferred the type for this genus to Pholliota, there has been no formal transfer of this New Zealand species at the time of writing.
This is a small lignicolous fungus that occurs in Nothofagus forests and appears to be very rare or perhaps only to fruit in wet years. The taxon has been orphaned as a result of the type species being assigned to Pholiota. However, whatever its correct name this fungus appears to be rare and either extinct or endangered depending on your taxonomic opinion.
This fungus is known from the type and a single collection in 1971 and 4 collections made 45 years later. It is either rare, or fruits rarely.
This is a saprotrophic fungus on rotting wood. Horak describes a range of hosts.The more recent finds were made on wood of Lophozonia menziesii.
This fungus appears to have a range of hosts and yet it has been recorded very rarely. The factors controlling its distribution and fruiting are not well understood. The small population makes it vulnerable to stochastic events.
Clarification of the biology of this fungus would assist in defining its conservation requirements.
Dahlberg A. and Mueller G.M. (2011) Applying IUCN red-listing criteria for assessing and reporting on the conservation status of fungal species. Fungal Ecology 4: 147-162.
Geospatial Conservation Assessment Tool: geocat.kew.org
Global Biodiversity Information Facility: gbif.org
Horak, E. (1971). Contributions to the knowledge of the Agaricales s.l. (Fungi) of New Zealand. New Zealand Journal of Botany. 9:463-493
Manaaki Whenau - Landcare Research databases: https://nzfungi2.landcareresearch.co.nz/
Redhead SA (2014). “Nomenclatural novelties” (PDF). Index Fungorum (148): 1. ISSN 2049-2375.