Mammillaria marcosii

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
PLANTAE	TRACHEOPHYTA	MAGNOLIOPSIDA	CARYOPHYLLALES	CACTACEAE

Scientific Name:

Mammillaria marcosii

Species Authority:

W.A.Fitz Maurice, B.Fitz Maurice & Glass

Common Name/s:

Spanish

–

Biznaguita

Taxonomic Notes:

Accepted as a valid species by Anderson (2001) and Pilbeam (1999 and provisionally by Hunt (1999).

Assessment Information [top]

Red List Category & Criteria:	Critically Endangered A2ad+3d; B1ab(v)+2ab(v); C1+2a(ii) ver 3.1
Year Published:	2002
Annotations:	Needs updating
Assessor/s:	Fitz Maurice, W.A. & Fitz Maurice, B.
Reviewer/s:	Stuppy, W. & Taylor, N.P. (Cacti & Succulent Plant Red List Authority)
Contributor/s:
Justification: Qualifies for listing due to its very small population of less than 150 plants found in a single small area of less than 1,000 km². Since this species was discovered in 1996 (Fitz Maurice et al. 1997), the population has diminished by an estimated 90% due to illegal collecting. The species continues to decline as a result of illegal collecting. (The generation length is estimated at 5–10 years.)

Geographic Range [top]

Range Description:	Found east of Xichu where it grows over a range of less than 1 km². Current estimated population is less than 150 individuals.
Countries:	Native: Mexico (Guanajuato)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population Trend:	Decreasing

Population Trend:

Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	On steeply sloping volcanic rocky terrain in semi-desert at an altitude of about 1,200 m.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	These plants are threatened by illegal collecting. The habitat is now well known to both commercial and amateur collectors.

Major Threat(s):

These plants are threatened by illegal collecting. The habitat is now well known to both commercial and amateur collectors.

Conservation Actions [top]

Conservation Actions:	Listed on CITES App. II, but enforcement of the laws in the countries of destination is needed.

Conservation Actions:

Listed on CITES App. II, but enforcement of the laws in the countries of destination is needed.

Bibliography [top]

	Anderson, E.F. 2001. The Cactus Family. Timber Press, Portland. Fitz Maurice, W. A., Fitz Maurice, B. and Glass, C. 1997. A new species of Mammillaria (M. marcosii), Series Stylothelae, from northwestern Guanajuato, Mexico. Cactus and Succulent Journal (US) 69(1): 10-?. Fitz Maurice, W. A., Fitz Maurice, B. and Glass, C. 1997. Repercussions - Mammillaria marcosii. Mammillaria Society Journal 37(4): ?. Hunt, D. 1999. CITES Cactaceae Checklist, 2nd ed. Royal Botanic Gardens, Kew and International Organization for Succulent Plant Study (IOS). IUCN. 2002. 2002 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 8 October 2002. Pilbeam, J. 1999. Mammillaria. Cirio Publishing Services, Southampton.

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

Fitz Maurice, W. A., Fitz Maurice, B. and Glass, C. 1997. A new species of Mammillaria (M. marcosii), Series Stylothelae, from northwestern Guanajuato, Mexico. Cactus and Succulent Journal (US) 69(1): 10-?.

Fitz Maurice, W. A., Fitz Maurice, B. and Glass, C. 1997. Repercussions - Mammillaria marcosii. Mammillaria Society Journal 37(4): ?.

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

IUCN. 2002. 2002 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 8 October 2002.

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

Citation:	Fitz Maurice, W.A. & Fitz Maurice, B. 2002. Mammillaria marcosii. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 26 May 2013.
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