Ambystoma granulosum 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Caudata Ambystomatidae

Scientific Name: Ambystoma granulosum Taylor, 1944
Common Name(s):
English Granular Salamander
Spanish Ajolote
Taxonomic Source(s): Frost, D.R. 2014. Amphibian Species of the World: an Online Reference. Version 6 (27 January 2014). New York, USA. Available at: (Accessed: 27 January 2014).
Taxonomic Notes: The species boundaries between this species and both Ambystoma lermaense and A. rivularis require further investigation. However, these three taxa are clearly differentiated from all other Mexican ambystomatids (H.B. Shaffer pers. comm.).

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Shaffer, H.B., Flores-Villela, O., Parra-Olea, G. & Wake, D.
Reviewer(s): Stuart, S.N., Chanson, J.S., Cox, N.A. & Young, B.E.
Listed as Critically Endangered because its Extent of Occurrence is less than 100 km2, all individuals are in a single sub-population, and there is continuing decline extent and quality of its habitat on the northwestern periphery of Toluca City.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is known only from a small area on the north-western periphery of Toluca city, central State of Mexico, Mexico, at 3,000m asl.
Countries occurrence:
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is no information available on the population status of this species.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This is a metamorphosing species spending most of its time on land in grassland habitat. It breeds in small pools and ponds, both artificial and natural.
Systems:Terrestrial; Freshwater

Threats [top]

Major Threat(s): Introduced predatory fishes are the major threat to this species, but the habitat also has been heavily impacted due to extensive urban and agricultural expansion (leading to the desiccation and pollution of its breeding habitat).

Conservation Actions [top]

Conservation Actions: It does not occur in any protected area, and the conservation and restoration of its habitats is urgent. It might be possible to breed this species in captivity. A survey is urgently needed to determine the current status of this species. Protected under the category Pr (Special protection) by the Government of Mexico.

Citation: Shaffer, H.B., Flores-Villela, O., Parra-Olea, G. & Wake, D. 2008. Ambystoma granulosum. The IUCN Red List of Threatened Species 2008: e.T59058A11877234. . Downloaded on 19 April 2018.
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