• Proposed
  • Under Assessment
  • NTPreliminary Assessed
  • 4Assessed
  • 5Published

Cantharellus pleurotoides T.W. Henkel, Aime & S.L. Mill.

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Scientific name
Cantharellus pleurotoides
Author
T.W. Henkel, Aime & S.L. Mill.
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Cantharellales
Family
Cantharellaceae
Assessment status
Preliminary Assessed
Preliminary Category
NT D1
Proposed by
James Westrip
Assessors
James Westrip, Adam Liddle

Assessment Notes

Justification

Craterellus pleurotoides is currently only known from Dicymbe corymbosa forest in Guyana near to Mt. Ayanganna. There is plenty of suitable habitat in the surrounding area and it is likely to be more widespread. While it can be gregarious it is infrequently encountered, and so while it may have a relatively large population size for a potentially restricted-range species, globally the population size could be quite small. While there is some uncertainty over the true population size, a conservative range taking into account its potential to be more widespread is estimated to be 1,000-25,000 mature individuals. The current trend is unknown, but with limited forest cover loss within its known range it is unlikely to be declining rapidly. Therefore, a precautionary assessment of Near Threatened under criterion D1, based on the lower end of the population size estimate is given here. However, further research is encouraged.


Taxonomic notes

This species is now in the genus Craterellus.


Why suggested for a Global Red List Assessment?

Chanterelle species


Geographic range

This species has been recorded within the Upper Potaro River Basin, approximately 20km east of Mt. Ayanganna in Dicymbe corymbosa forest, at 710-720 m asl (Henkel et al 2006, Wilson et al. 2012).


Population and Trends

This species is currently thought to be restricted to Guyana, within a relatively small area of moist tropical forest dominated by Dicymbe corymbosa. There is the potential for habitat loss, but given the extremely low levels of forest cover loss in the area it has been collected from (see World Resources Institute 2023), it is uncertain whether such a threat is impacting the species currently, unless it is more widespread.

It occurs as gregarious to imbricate individuals in small troops, although it is infrequently encountered (Henkel et al. 2006). Taking this into account along with the number of collections known within the region of the type collection this suggests that the population size could be relatively large for a species currently known from such a restricted range. Treating the species as a lignicolous species based on its recorded ecology, a scaling factor of 2-5 mature individuals could be used for each functional individual (see Dahlberg and Mueller 2011). Even within a narrow range for the species, given the amount of suitable habitat there could be 100 times more sites, and even assuming there is only one functional individual per site could give a minimum population size of 1,000 mature individuals. However, if using a higher scaling factor and assuming it is even more widespread then the population size could be as high as 25,000 mature individuals.

Population Trend: Uncertain


Habitat and Ecology

This species is known to occur within forests dominated by Dicymbe corymbosa. It has been noted to occur on sticks, mosses, living roots, and decaying wood at positions elevated from the forest floor (Henkel et al 2006). It has been encountered during the rainy season (May-July) (Henkel et al. 2006).

Subtropical/Tropical Moist Lowland Forest

Threats

While there may be localised threats to the species’ habitat, World Resources Institute (2023) shows very little forest cover loss around the known areas of occurrence.


Conservation Actions

While there appears to be limited forest cover loss around the known occurrence sites (see World Resources Institute 2023), ensuring effective protection for this area would be beneficial for this species in the long-term.

Resource & habitat protection

Research needed

Further research into this species’ specific distribution and potential threats is required.

Population size, distribution & trendsThreats

Use and Trade

There is no information regarding use/trade of this species.


Bibliography


Country occurrence

Regional Population and Trends

Country Trend Redlisted