This species is known only from its type locality within the Brazilian Amazon forest, near the border with Peru. It was collected more than 120 years ago and never found again. Despite the lack of data to infer its potential occurrence range, it is plausible to suspect that the species occurs along the Amazon where its specific (and up to now unclear) biotic and abiotic requirements are met, since it was never found in other Brazilian phytogeographical domains with higher sampling efforts, such as the Atlantic Forest. It is plausible to state that the species forms symbiotic relationships with an unknown plant host, as species within Cantharellus are often ectomycorrhizal. The species’ rarity, its type locality lack of sampling efforts, and lack of distribution data hinder minimal understanding of its potential distribution, ecology, and niche requirements. More efforts are required to understand the species’ needs, past and current trends, threats, and taxonomy. Therefore, C. helvelloideus is assessed as Data Deficient.
Cantharellus helvelloideus Henn., Hedwigia 43 (3): 181 (1904) [MB#535550]
Cantharellus helvelloideus is a rare species collected only once in the Brazilian Amazon more than 120 years ago.
Cantharellus helvelloideus is known only from its type locality within the Brazilian Amazon forest, in the vicinities of Juruá-Mirim river, Acre state, near the border with Peru. The species’ rarity, considering that it was collected only once in 1901, described in 1904, and never found again, hinders the understanding and minimally precise inferring of its potential occurrence area. Nevertheless, it is reasonable to expect that the species occurs within the Amazon in similar habitats, possibly associated with a specific host, as Cantharellus species are often ectomycorrhizal.
The species is currently only known from its holotype, registered in the Acre state, Brazil, near Juruá-Mirim river, at the border with Peru, in the Brazilian Amazon forest. The species type locality currently represents a large sampling gap for fungi, which can contribute to the apparent rarity of the species, where since its description 120 years ago, it was never registered again. Nevertheless, the species was never found in other Brazilian phytogeographical domains that are historically more well sampled, such as the Northern and Southern Atlantic Forest, indicating that the species can be restricted to the Amazon. Considering this, with currently available data, it is not viable to estimate population parameters or minimally understand the species’ niche requirements to reasonably infer its potential area of occurrence.
Population Trend: Uncertain
Despite the lack of data to infer C. helvelloideus potential occurrence range, it is plausible to suspect that the species occurs along the Amazon where its specific biotic and abiotic requirements are met. It is also plausible to state that the species forms symbiotic relationships with an unknown plant host, as species within Cantharellus are often ectomycorrhizal.
The lack of data regarding the species distribution, habitat requirements, and population trends hinders the understanding of threats to it.
It is impossible to recommend conservation actions for C. helvelloideus based on current data available for the species.
As C. helvelloideus was described 120 years ago with no new collections so far, further research and sampling efforts are needed to minimally understand the species distribution, potential niche, and biology. This is true especially for its type locality, representing a gap in mycological sampling efforts. Due to its apparent rarity and lack of recent data, it is crucial to better understand its taxonomy and relation with other Amazonian Cantharellus species.
None known
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