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

Jimtrappea guyanensis T.W. Henkel, M.E. Smith & Aime

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Scientific name
Jimtrappea guyanensis
Author
T.W. Henkel, M.E. Smith & Aime
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Boletales
Family
Boletaceae
Assessment status
Preliminary Assessed
Preliminary Category
DD
Proposed by
Matthew Smith
Assessors
Matthew Smith
Contributors
Terry Henkel
Comments etc.
Janet Scott
Reviewers
Bryn Dentinger

Assessment Notes

Justification

This species is known from three sites in Guyana, where a tiny fraction of its possible suitable habitat has been surveyed. Potential host plants occur in a large region encompassing parts of Venezuela, northern Brazil and southeast Colombia. This entire region is very under-sampled, being very remote and completely unsurveyed. In total approximately 0.002% of its potential suitable habitat has been surveyed for fungi. It is not possible to estimate population size or trends, EOO, or AOO. Increasing threats from timber and mineral extraction, and land use changes are anticipated, with the potential for these to be rapid if further road construction occurs. It is therefore assessed as Data Deficient, and further survey work in this region is urgently needed.


Taxonomic notes

This species was described recently by Smith et al. (2015).


Why suggested for a Global Red List Assessment?


Geographic range

This species is known only from Dicymbe-dominated forests in the Upper Potaro and Upper Mazaruni River Basins of Guyana.
There are three main collecting sites for this species.
    Site 1: Guyana: Region 8 Potaro-Siparuni: Pakaraima Mountains, Upper Potaro River Basin, ~10 km southeast of a base camp at 5°18’04.8” N 59°54’40.4” W, near Tadang camp, 20 cm deep within lateritic soil under Dicymbe corymbosa, D. altsonii, and Aldina insignis
    Site 2: Guyana: Region 8 Potaro-Siparuni: Pakaraima Mountains, ~1.5 km southwest
of base camp at 5°18’04.8” N 59°54’40.4” W, on Cathie’s Hill, in lateritic soil under D. corymbose
    Site 3: Guyana: Region 7 Cuyuni-Mazaruni: Pakaraima Mountains, Upper Mazaruni River Basin, ~10 km west of Mt Ayanganna in vicinity of Pegaima savanna base camp at 5°26’21.3”, N 60°04’43.1” W, vicinity of base camp, in white sand soils under P. dipterocarpacea and Dicymbe jenmanii,

This entire region is very under-sampled, and there are areas in neighbouring Venezuela, northern Brazil and southeast Colombia with similar habitats and Dicymbe host tree species but which are very remote and completely unsurveyed.


Population and Trends

This species has been found in three different sites in Guyana in forests that are dominated by Dicymbe species. It may be a common ectomycorrhizal associate of Dicymbe across the wider Guiana Shield region, however this is unknown. The animal vector required for its dispersal is also unknown. It is therefore not possible to estimate how many additional sites it could be found at, and therefore its population size is entirely unknown.

Population Trend: Uncertain


Habitat and Ecology

Solitary or in small groups, semi-emergent at the humic layer interface on the forest floor, or hypogeous deeper within mineral soil, in forests on lateritic or white sand soils under Aldina insignis, Dicymbe altsonii, D. corymbosa, D. jenmanii, or Pakaraimaea dipterocarpacea. Known only from the Upper Potaro and Upper Mazaruni River Basins of Guyana.

Subtropical/Tropical Moist Montane Forest

Threats

Current threats include climate change and small-scale mineral extraction that can cause habitat disturbance although these threats are currently not thought to be severe as much of the interior of the region is very remote. Future threats from timber and mineral extraction, and land use changes are anticipated, with the potential for these to be rapid if further road construction occurs. Further impacts of climate change, particularly droughts, are also anticipated.

Mining & quarryingRoads & railroadsUnintentional effects: subsistence/small scale (species being assessed is not the target) [harvest]Habitat shifting & alterationDroughts

Conservation Actions

No conservation actions are currently in place for this species. Protection of habitat is needed.

Resource & habitat protection

Research needed

This species has only been found at two locations but more work is needed to understand the distribution across the wider Guiana Shield region.

Population size, distribution & trends

Use and Trade

This species has no known human uses.


Bibliography


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted