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Meiorganum neocaledonicum R. Heim

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Scientific name
Meiorganum neocaledonicum
Author
R. Heim
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Boletales
Family
Paxillaceae
Assessment status
Published
Assessment date
2019-07-25
IUCN Red List Category
DD
Assessors
Leonard, P.L.
Reviewers
Mueller, G.M.

Assessment Notes

The content on this page is fetched from The IUCN Red List of Threatened Species: https://www.iucnredlist.org/species/154529250/154529266

Justification

Meiorganum neocaledonicum is a large bracket fungus recorded from New Caledonia, Papua New Guinea, and Malaysia. It has been collected from large fallen logs of Kauri trees, Agathis lanciolata in New Caledonia and another unspecified species of Agathis in other parts of its range. Given the potential area the species can inhabit (New Caledonia, Papua New Guinea, Malaysia) coupled with the very limited available data (eight records), it is not possible to make an estimate of its distribution, population size, or trends. However, species of Agathis,  its host tree, are under threat and decline due to forestry activities, fire, and Kauri Dieback disease so the population of M. neocaledonicum may be in decline. It is therefore assessed as Data Deficient. 



Geographic range

Meiorganum neocaledonicum is a large bracket fungus recorded from New Caledonia, Papua New Guinea, and Malaysia. It has been collected from large fallen logs of Kauri trees, Agathis lanciolata in New Caledonia an other unspecified species of Agathis in other parts of its range.

Kauri trees have been harvested for their timber and the majority of the once huge Kauri forests are gone (Whitmore 1980). Forest clearing is still proceeding in all the states in which this fungus has been found. Worldwide it is estimated that less than 5% of the original Kauri forests remain. In New Zealand Kauri dieback disease is devastating the species in parts of its range. Agathis lanceolata the host in New Caledonia is IUCN listed as Vulnerable.

Population and Trends

The species is known for only 8 collections; PNG from a single record from 1995, New Caledonia from the three collections from 1964 and 1965 plus three recent records post 2010, and Malaysia from one record collected on Mt Kinabalu in Saba. 

Given the potential area the species can inhabit coupled with the very limited available data (8 records), it is not possible to make an estimate of its distribution, population size, or trends. However, species of Agathis, its host tree, are under threat and decline due to forestry activities, fire, and Kauri Dieback disease so the population of M. neocaledonicum may be in decline.

Population Trend: unknown


Habitat and Ecology

Meiorganum neocaledonicum is a wood inhabiting fungus reported from three widely separated populations in the South Pacific: New Caledonia, North Queensland and Papua New Guinea. It is probably long lived with a generation length of 50 years or more and is associated with two, or possibly more, Kauri (Agathis) species. Agathis are relatively long lived trees, and its wood is slow to decay.

Threats

Meiorganum neocaledonicum is only known to be associated with the coniferous genus Agathis which is restricted to the sub-tropical forests of the south western pacific. Kauri trees have been harvested for their timber and the majority of the once huge Kauri forests are gone (Whitmore 1980). Forest clearing is still proceeding in all the states in which this fungus has been found. Climate change is increasing the risk of fire to which the fungus and its host are vulnerable. In New Zealand Kauri dieback disease is negatively impacting Agathis. There is high risk that the disease will spread beyond its current range. Agathis lanceolata, the host in New Caledonia, is assessed as Vulnerable on the IUCN Red List.

Conservation Actions

Site management to control harvesting of the host tree and continued efforts to control the spread of Kauri Die Back disease. 

Better information on the species distribution and confirmation that the species is restricted to Kauri is needed.

Use and Trade

The species is not utilized.

Source and Citation

Leonard, P.L. 2019. Meiorganum neocaledonicum. The IUCN Red List of Threatened Species 2019: e.T154529250A154529266. https://dx.doi.org/10.2305/IUCN.UK.2019-3.RLTS.T154529250A154529266.en .Downloaded on 31 January 2021

Country occurrence