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  • Under Assessment
  • Preliminary Assessed
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Hygrophorus mexicanus (Singer) Hesler & A.H. Sm.

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Scientific name
Hygrophorus mexicanus
Author
(Singer) Hesler & A.H. Sm.
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Agaricales
Family
Hygrophoraceae
Assessment status
Assessed
Preliminary Category
LC
Proposed by
Eduardo Perez Pazos
Assessors
Roberto Garibay Orijel, Eduardo Perez Pazos
Editors
Roberto Garibay Orijel
Comments etc.
Anders Dahlberg

Assessment Notes

Hygrophorus mexicanus distribution covers not also the Neotropics and South USA, but also the Hawaian islands.
There are few records of Hygrocybe mexicana, however as it is a generalist saprobe and has a wide distribution thru the neotropics and USA its population should be numerous.

Justification

H. mexicana has a EOO = 46,621,00 km2 and a minimum AOO = 25,500 km2. Given that the species is not linked to specific ecosystem or substrate, and its large EOO and AOO it should be listed as Less concern.


Taxonomic notes

This species was described as Hygrocybe mexicana by Singer 1958, later Hesler & Smith (1953) move it to Hygrophorus mexicanus. However the species fits better to the current concept of Hygrocybe.
Later, Desjardin & Hemmes (1997) described Hygrocybe mexicana f defibulata.
Hygrocybe mexicana has a brightest scarlet red, glabrous, sulcate and transparently striate margin pileus. Yellowish lamellae mixed with pinkish-red and brightest scarlet red stipe. This species is closely related to the European Hygrophorus coccinea and H. firma, and can be distinguished because of its orangish red lamellae (Singer 1958).


Why suggested for a Global Red List Assessment?

Hygrophorus mexicanus distribution covers not also the Neotropics and South USA, but also the Hawaian islands.
There are few records of Hygrocybe mexicana, however as it is a generalist saprobe and has a wide distribution thru the neotropics and USA its population should be numerous.
H. mexicana has a EOO = 46,621,00 km2 and a minimum AOO = 25,500 km2. Given that the species is not linked to specific ecosystem or substrate, and its large EOO and AOO it should be listed as Less concern.


Geographic range

Hygrophorus mexicanus has been collected from North America in USA, Mississipi; and Mexico in Veracruz and Oaxaca. Its distribution goes down to South America where it has been reported from Brasil, Manaus, Argentina, Jujuy and Chile, Pumanque. All South American collections were made by Singer, the original author of the species (GBIF secretariat 2017).
If we consider Hygrophorus mexicanus f deibulata as part of the species, its distribution covers not also the Neotropics and South USA, but also the Hawaian islands. All together this makes an EOO = 46,621,00 km2 and a minimum AOO = 25,500 km2.


Population and Trends

There are few records of Hygrocybe mexicana, however as it is a generalist saprobe and has a wide distribution thru the neotropics and USA its population should be numerous.

Population Trend: Uncertain


Habitat and Ecology

Along the margins of the plantations, gregarious, on earth and humus, fruiting during the rainy season (Singer 1958). Later Guzmán et al. (1986) report it as terricolous, gregarious, in the edges of a mountain cloud forest near a grassland (“potrero”) at 1340 masl. It has also been reported as scattered to gregarious in cow pasture. So it is a saprobe not particularly associated to a specific substrate. It develops from Mountain Tropical Cloud Forests, to Tropical Rain Forests and tropical and subtropical grasslands.

Subtropical/Tropical Moist Lowland ForestSubtropical/Tropical Moist Montane Forest

Threats

The localities where this species is reported are under strong pressures due to urban development and land-use changes, particularly those in Mexico. In Brazil, for example, the area where this species was reported is now surrounded by agriculture lands and those destinated for cattle. However, given its large EOO and AOO this threats do not put it in risk.

Housing & urban areasShifting agricultureSmall-holder grazing, ranching or farming

Conservation Actions

By now, the localities where this species is recorded are out of any National Park or similar conservation areas. Hygrophorus mexicanus is not listed in any national or international Redlist.


Research needed

To obtain DNA sequences from Hygrophorus mexicanus from South America and Hawaii to compare those with type specimen to explore the possibility of a species complex. An increase in sampling effort to locate more subpopulations of the species.

TaxonomyLife history & ecology

Use and Trade

There is no report about the edibility or use of this species.


Bibliography

Singer 1958. Fungi Mexicani, Series secunda Agaricales. Sydowia 7: 221-243
Guzmán, G., Montoya-Bello, L., & Bandala-Muñoz, V. M. (1986). Nuevos registros de hongos en el Estado de Veracruz, II. Algunos Agaricales. Scientia Fungorum, 3(2), 73-84.
Hygrophorus mexicanus (Singer) Hesler & A.H.Sm. in GBIF Secretariat (2017). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2019-05-20.
HESLER, L., & SMITH, A. (1963). North American species of Hygrophorus. North American species of Hygrophorus.
Desjardin, D. E., & Hemmes, D. E. (1997). Agaricales of the Hawaiian Islands. 4: Hygrophoraceae. Mycologia, 89(4), 615-638.


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted