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Mammillaria sinistrohamata

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA MAGNOLIOPSIDA CARYOPHYLLALES CACTACEAE

Scientific Name: Mammillaria sinistrohamata
Species Authority: Boed.
Taxonomic Notes: Considered a synonym of M. mercadensis by cactus specialist Anderson (2001) and by the assessors. Provisionally accepted as a species by cactus specialists, Hunt (1999) and Pilbeam (1999). This assessment is based on the populations in the areas identified as M. sinistrohamata by Pilbeam. The assessors find no characteristics in the description that differentiate it from M. mercadensis. The counterclockwise orientation of the hooks on the central spines, that is the basis of the epithet, appears irregularly as it does in other M. mercadensis subpopulations. The yellow spines and flowers appear also in M. mercadensis (Hunt 1987 re M. sinistrohamata).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2009
Annotations:
Needs updating
Assessor/s: Fitz Maurice, B, Fitz Maurice, W.A.
Reviewer/s: Taylor, N. & Stuppy, W.
Contributor/s:
Justification:
Qualifies as Least Concern due to its numerous subpopulations over a relatively large area and a large number of individuals, where some continuing decline is in evidence. The number of subpopulations and individuals makes conservation measures a low priority.

Geographic Range [top]

Range Description: Species endemic to Mexico, occurring in the states of Durango and Zacatecas at elevations of about 1,900 m. M. sinistrohamata appear over a 5,000 km2 area.
Countries:
Native:
Mexico (Durango, Zacatecas)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population:

Estimated population size of more than 10,000 individuals.

Habitat and Ecology [top]

Habitat and Ecology: Among volcanic rocks in semi desert.
Systems: Terrestrial

Threats [top]

Major Threat(s): There is some illegal collecting by tour groups and individuals. Increased agricultural use and housing expansion pose a small threat.
Citation: Fitz Maurice, B, Fitz Maurice, W.A. 2009. Mammillaria sinistrohamata. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 20 May 2013.
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