Assessment Notes

Justification

This species is known from only five localities, in Guyana and Colombia. This species has not been reported from any protected areas, and its habitat is potentially threatened by logging, wood harvesting, and mining, however further research is needed in order to confirm this. Given its relatively wide distribution and lack of evidence of steep declines, it is currently assessed as Least Concern.

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Geographic range

Craterellus strigosus has been collected in the Amazonian biome in Guyana and Colombia This species is currently known from only five localities: two in Guyana (Dicymbe forest on white sand soils and associated with Pakaraimaea dipterocarpacea); and three in Colombia (two in the Middle Caquetá region in the north of the Amazonia department, and one in the south of Colombia 27 km north of Leticia, close to the border with Brazil). The three localities in Colombia are separated by 420 km, all associated with the endemic dipterocarp tree Pseudomonotes tropenbosii or Dicymbe uaiparuensis.

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Population and Trends

The habitat of Craterellus strigosus is likely to be threatened by logging, wood harvesting and illegal mining at at least some of its known localities, and this species has not been reported from any protected areas. It is reasonable to assume that this species' population may be decreasing, however further information regarding the present wild distribution of this species is needed in order to confirm this.

Population Trend: Decreasing

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Habitat and Ecology

Craterellus atratus is a common ectomycorrhizal species, occurring as scattered formations on the root/humus mat of forest floor. It has been collected in the Amazonian biome, including Fabaceae-dominated forest (Dicymbe spp. and Aldina spp.) in Guyana and Colombia (Henkel et al. 2012, Smith et al. 2013, Vasco-Palacios et al. 2018), forests dominated with Pakaraimaea dipterocarpacea in Guyana (Smith et al. 2013) and terra-firme forests dominated by the dipteroparp tree Pseudomonotes tropenbosii in Colombia (Vasco-Palacios et al. 2022).

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Threats

This species is likely to be threatened by logging, wood harvesting and illegal mining at at least some of its known localities. Populations of Dicymbe species associated with Craterellus strigosus are severely fragmented in some regions, however some Dicymbe species have been assessed Least Concern (Beech 2024a,b). Also, the population of Pseudomonotes tropenbosii is thought to be stable as the forests in these areas are still in relatively good condition and the species has been assessed as Least Concern (Lopez-Gallego and Morales 2020). However, the known sites of Craterellus strigosus are located close to indigenous villages, and indigenous peoples use the terra-firme forests to establish chagras or farming areas, where they could destroy entire patches of habitat. Also, this region is being negatively impacted by illegal mining (Forest 500 initiative 2024). These actions may become future, broader threats to the species.

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Conservation Actions

No conservation actions are currently in place for Craterellus strigosus. Protection of this species' habitat is required for its successful conservation. Further research into this species' current wild distribution, habitat preferences, and potential threats is also required to build an accurate assessment of this species.

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Use and Trade

Craterellus strigosus forms small basidiomes; no human use is known.

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Source and Citation

Vasco Palacios, A.M. 2025. Craterellus strigosus. The IUCN Red List of Threatened Species 2025: e.T189310089A189329775. Accessed on 26 November 2025.

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• Country occurrence