|Scientific Name:||Mammillaria herrerae|
|Taxonomic Notes:||Accepted as a valid species by Anderson (2001), Hunt (1999) and Pilbeam (1999).|
|Red List Category & Criteria:||Critically Endangered A2ae; B1ab(v)+2ab(v); C2a(ii) ver 3.1|
|Assessor/s:||Fitz Maurice, W.A. & Fitz Maurice, B.|
|Reviewer/s:||Stuppy, W. & Taylor, N.P. (Cacti & Succulent Plant Red List Authority)|
Qualifies for listing due to its small population of only 50 individuals in a single area of 1 km², where it continues to decline as a result of illegal collecting.
|Range Description:||Current estimated population is less than 50 individuals growing over 1 km² to the west of Presa Zimapan.|
|Range Map:||Click here to open the map viewer and explore range.|
|Habitat and Ecology:||Grows on sloping calcareous rock in semi desert at about 1,800 m altitude.|
|Major Threat(s):||Very threatened by illegal collecting. The population of this species has been diminished by an estimated 95% over the past 20 years. The habitat is now well known to both commercial and amateur collectors. A nearby commercial cactus nursery has almost stripped the site. Local children collect and offer plants to visitors. A very small amount of residential development is in progress in the area.|
|Conservation Actions:||Listed on CITES App. II, but enforcement of the laws in the countries of destination is needed. The species has long been propagated around the world.|
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. 2002. 2002 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 8 October 2002.
Pilbeam, J. 1999. Mammillaria. Cirio Publishing Services, Southampton.
Werdermann, E. 1931. M. herrerae Werd und ihre Varietat albiflora Werd. Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem. Berlin-Dahlem 277.
|Citation:||Fitz Maurice, W.A. & Fitz Maurice, B. 2002. Mammillaria herrerae. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 19 June 2013.|
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