Mammillaria berkiana 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Caryophyllales Cactaceae

Scientific Name: Mammillaria berkiana A.B.Lau
Common Name(s):
Spanish Biznaguita
Taxonomic Source(s): Hunt, D., Taylor, N. and Charles, G. (compilers and editors). 2006. The New Cactus Lexicon. dh Books, Milborne Port, UK.
Taxonomic Notes: Taxonomic Reliability: Considered synonymous with M. mercadensis by cactus specialist Anderson (2001) and by the assessors. It is accepted as a species by cactus specialists Hunt (1999), provisionally, and Pilbeam (1999). The assessors have demonstrated that M. berkiana has no known characteristics that differentiate it from the surrounding M. jaliscana/M. mercadensis apart from the intensity of the flower color.

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2017
Date Assessed: 2009-02-25
Assessor(s): Terrazas, T., Cházaro, M. & Arreola, H.
Reviewer(s): Chanson, J.S. & Goettsch, B.K.
Facilitator/Compiler(s): Schipper, J.
This species is considered to be Vulnerable (under criterion D2) as it is known from only two locations, one of which was decimated by frost in the 1990's. Since that time a second population was discovered where an intact, small but abundant population remains. Therefore considering this new information the status has changed from Critically Endangered to Vulnerable. However, according to the assessors this species should be re-evaluated after its taxonomic status is confirmed. The species is provisionally assessed herein under the tentative placement of the taxa in M. berkiana
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is known from two locations. It is endemic to the Mexican state of Jalisco, where it occurs in two subpopulations in the Sierra Huichol at elevations between 2,000 to 2,500 m asl. The species was originally described from north of San Andrés from two sites about 3 km apart, probably best considered a single location. A new location has been discovered (M. Cházaro pers. comm 2009).
Countries occurrence:
Mexico (Jalisco)
Additional data:
Number of Locations:2
Lower elevation limit (metres):2000
Upper elevation limit (metres):2500
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is known from two locations, one where it is relatively common and another where it is extremely rare. In 1999 the species had a total population estimated to be less than 100 individuals, which referred to only a single location. Since that time a second population has been described and recent expeditions to the new location have found the species to be locally abundant within a very limited range.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This species is found in pine oak forests.

Use and Trade [top]

Use and Trade: This species is not utilized.

Threats [top]

Major Threat(s): There are no major threats to this species. Natural disasters seem to be the main cause for concern. There is very little collecting as the location is very remote.

Conservation Actions [top]

Conservation Actions: There is an urgent need to identify the distribution and taxonomy of this species. It is listed on CITES Appendix II, but there is a need to enforce the laws in the countries of destination.

Amended [top]

Amended reason: The species distribution map has been added.

Classifications [top]

1. Forest -> 1.4. Forest - Temperate
5. Law & policy -> 5.4. Compliance and enforcement -> 5.4.1. International level

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:No
In-Place Species Management
In-Place Education
  Included in international legislation:Yes
  Subject to any international management/trade controls:Yes
11. Climate change & severe weather -> 11.3. Temperature extremes
♦ timing:Past, Unlikely to Return ♦ scope:Minority (<50%)   
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.5. Threats

Bibliography [top]

Anderson, E.F. 2001. The Cactus Family. Timber Press, Portland.

Hunt, D. 1999. CITES Cactaceae Checklist, 2nd ed. Royal Botanic Gardens, Kew and International Organization for Succulent Plant Study (IOS).

IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.1). Available at: (Accessed: 12 June 2013).

IUCN. 2017. The IUCN Red List of Threatened Species. Version 2017-3. Available at: (Accessed: 7 December 2017).

Lau, A. 1986. Mammillaria berkiana. Kakteen & Sukkulenten 37: 2.

Pilbeam, J. 1999. Mammillaria. Cirio Publishing Services, Southampton.

Citation: Terrazas, T., Cházaro, M. & Arreola, H. 2017. Mammillaria berkiana. In: (amended version of 2013 assessment). The IUCN Red List of Threatened Species 2017: e.T40827A121499823. . Downloaded on 22 June 2018.
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