Xenosaurus grandis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Reptilia Squamata Xenosauridae

Scientific Name: Xenosaurus grandis (Gray, 1856)
Taxonomic Notes: This is a species complex that is currently under revision.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii,v) ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Needs updating
Assessor(s): Canseco-Márquez, L.
Reviewer(s): Cox, N., Chanson, J.S. & Stuart, S.N. (Global Reptile Assessment Coordinating Team)
Listed as Vulnerable because its extent of occurrence is less than 20,000 km², its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat, and in the number of mature individuals, in Mexico and Guatemala.

Geographic Range [top]

Range Description:This species ranges from central-southern Mexico to central Guatemala. Several disjunct populations are recognized: one in central Veracruz; one in southern Oaxaca; one in northern-central Oaxaca; two along the highlands of central Chiapas; and one in central Guatemala. There are five subspecies, several of which might actually be full species. It is known from 800 to 1,200 m asl.
Countries occurrence:
Guatemala; Mexico
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:At some localities it is common but in others it is uncommon.
Current Population Trend:Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:The five recognized subspecies inhabit a great variety of ecosystems, from xerophytic vegetation to tropical rainforest and cloud forest, oak forest, and tropical deciduous forest. It is commonly found in volcanic terrains and rocks, and can also be found in secondary or degraded forest. It lives in rock crevices.

Threats [top]

Major Threat(s): This species in the international pet trade, with all specimens being taken from the wild. The subspecies Xenosaurus grandis grandis may have been reduced to only two subpopulations near the town of Cuautlapan in Veracruz, mostly because the area that surrounds Orizaba and Córdoba is highly deteriorated due to human activities (Zúñiga-Vega et al. 2007). One of the two surviving subpopulations of Xenosaurus grandis grandis is on Buena Vista Mountain, which belongs to a cement factory, whose activities include mountain demolition to obtain raw materials for the production of construction cement (Zúñiga-Vega et al. 2007).

Conservation Actions [top]

Conservation Actions: This species complex is currently under taxonomic revision, and some of the subspecies are in the process of being elevated to the species level. A re-evaluation of the Red List status of these species will then be needed as some of them might be seriously threatened. Its range includes Los Tuxtlas Biosphere Reserve and Ocote Biosphere Reserve.

Citation: Canseco-Márquez, L. 2007. Xenosaurus grandis. The IUCN Red List of Threatened Species 2007: e.T64369A12774503. . Downloaded on 21 September 2018.
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