• Proposed
  • Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Tuber regimontanum Guevara, Bonito & J. Rodr.

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Scientific name
Tuber regimontanum
Guevara, Bonito & J. Rodr.
Common names
IUCN Specialist Group
Cup-fungi, Truffles and Allies
Assessment status
Under Assessment
Proposed by
Gonzalo Guevara-Guerrero
Gonzalo Guevara-Guerrero
Ricardo Garcia-Sandoval, Roberto Garibay Orijel
Comments etc.
Anders Dahlberg

Assessment Notes

Taxonomic notes

Tuber regimontanum is an ectomycorrhizae truffle associated with Quercus polymorpha that can be recognized by its blackish color peridium. Microscopically, T. regimontanum can be recognized by having ascospores of 33-55 (-62) x 23-31 µ and by DNA (ITS) variation.

Why suggested for a Global Red List Assessment?

Tuber regimotanum is a rare hypogeous ectomycorrhizal fungus only known from the type locality from northeastern Mexico. This truffle is associated with Quercus polymorpha (and other species) forests, This vegetation is threatened by wild fires, illegal deforestation and changes in land use. This species should be protected because of its limited distribution to northeastern Mexico.

Geographic range

Tuber regimontanum is only known from Nuevo León, locality of Sierra of Picachos, Municipality of Higueras. The collecting site is part of the Sierra Madre Oriental This species grows in ectomycorrizal associated with Quercus polymorpha forest.

Population and Trends

GBIF (2019) do mention one occurrence from the same type locality. This truffle is known from one single sampling locality: one single collections from one single site from northeastern Mexico. The Quercus polymorpha hills hosts this species. In addition, efforts to find this hypogeous species have been unsuccessful in the last 10 years. Tuber regimontanum was described by Guevara et al 2008. The few existing specimens and records do not seem to be a result of an undersampling.

Population Trend:

Habitat and Ecology

Ascomata are hypogeous, gregarious, associated with Quercus polymorpha trees producing few sporocarps. Its fruiting season is in Fall (August) at 306 m elevation.

Subtropical/Tropical Moist Lowland Forest


The only known population of Tuber regimontanum grows associated with Quercus spp. forest. The Quercus polymorpha forests are subjeted to land cover-change, illegal timber extraction and wild fires. Urban expansion is severely threatening the surrounding forests and therefore T. regimontanum as well.

Housing & urban areasIntentional use: subsistence/small scale (species being assessed is the target) [harvest]Increase in fire frequency/intensity

Conservation Actions

Tuber regimontanum is presented in the Ecological Reserve Sierra of Picachos, Municipality of Higueras, Nuevo Leon, Mexico. An action priority to protect this truffle would be to protect its habitat and other endangered species of fungi. Tuber regimontanum is not enlisted in either Red nor National lists up to date.

Site/area protection

Research needed

Increase sampling to other sites where Quercus polymorpha is present. In addition, analysis of the ITS and other genes are required for phylogenetic and evolutionary studies from fresh and dried specimens to know more about the relationship between T. regimontanum and quercus spp. in northeaster Mexico.


Use and Trade

There are not reports about edibility or use of this species, however, it is suspected to be edible.

Food - human


GBIF Secretariat. (2019). Tuber regimontanum. Retrieved May 25, 2019, from https://www.gbif.org/species/5451995

Guevara, G., G. Bonito, E. Cázares, J. A. Rodriguez y R. Vilgalys. 2008. Tuber regimontanum,  new species of truffle from Mexico. Revista Mexicana de Micología. 26: 17-20.

Known distribution - countries

Regional Population and Trends

Country Trend Redlisted