Hypopachus variolosus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Microhylidae

Scientific Name: Hypopachus variolosus (Cope, 1866)
Common Name(s):
English Mexican Narrow-mouthed Toad, Sheep Frog
Engystoma inguinalis (Cope, 1870)
Engystoma variolosum Cope, 1866
Hypopachus alboventer Taylor, 1940
Hypopachus alboventer ssp. reticulatus Davis, 1955
Hypopachus caprimimus Taylor, 1940
Hypopachus championi Stuart, 1940
Hypopachus cuneus Cope, 1889
Hypopachus cuneus ssp. nigroreticulatus Taylor, 1940
Hypopachus globulosus Schmidt, 1939
Hypopachus inguinalis Cope, 1870
Hypopachus maculatus Taylor, 1940
Hypopachus ovis Taylor, 1940
Hypopachus oxyrrhinus Boulenger, 1883
Hypopachus oxyrrhinus ssp. taylori Shannon & Humphrey, 1958
Hypopachus seebachi Keferstein, 1867
Systoma variolosum (Cope, 1866)
Taxonomic Source(s): Frost, D.R. 2013. Amphibian Species of the World: an Online Reference. Version 5.6 (9 January 2013). Electronic Database. American Museum of Natural History, New York, USA. Available at:

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2009-01-06
Assessor(s): Santos-Barrera, G., Hammerson, G.A., Chaves, G., Wilson, L.D., Walker, P., Bolaños, F. & Ponce-Campos, P.
Reviewer(s): Stuart, S.N., Chanson, J.S., Cox, N.A. & Young, B.E.
Listed as Least Concern in view of its wide distribution, tolerance of a broad range of habitats, presumed large population, and because it is unlikely to be declining to qualify for listing in a more threatened category.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species can be found in the Pacific and Atlantic slopes in Mexico, in the Atlantic, from southern Texas, USA, to Costa Rica, in the Pacific, from southern Sonora to Costa Rica, at elevations of 0-2,100 m asl.
Countries occurrence:
Belize; Costa Rica; El Salvador; Guatemala; Honduras; Mexico; Nicaragua; United States
Additional data:
Upper elevation limit (metres):2100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This dry Pacific slope species is currently spreading into Meseta Central and to the Caribbean slope at Cachí, Cartago Province, in Costa Rica. However, this species has disappeared and then reappeared in limited parts of its range at Monteverde (Pounds et al. 1998). It is common along both Pacific and Atlantic slopes in Mexico, and is widespread and common in the Yucatan Peninsula (Lee 2000). In Texas, it is fairly common but seldom seen (Bartlett and Bartlett 1999). In Calakmul, Campeche, Mexico, it is abundant in old growth vegetation but rare in second growth.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits low and moderate elevations in tropical humid forests as well as disturbed and opened habitats. It can also be found in moist sites in arid areas; margins of ponds, marshes, under leaf-litter, in underground burrows, under rocks and other surface cover, in packrat nests. Eggs and larvae develop in pools formed by heavy rains or irrigation water.
Systems:Terrestrial; Freshwater

Threats [top]

Major Threat(s): There are no major threats to this species.

Conservation Actions [top]

Conservation Actions: Conservation measures are not needed for this species. It occurs in many protected areas.

Errata [top]

Errata reason: Reformatted names of assessor(s), reviewer(s), contributor(s), facilitator(s) and/or compiler(s).

Citation: Santos-Barrera, G., Hammerson, G.A., Chaves, G., Wilson, L.D., Walker, P., Bolaños, F. & Ponce-Campos, P. 2010. Hypopachus variolosus (errata version published in 2016). The IUCN Red List of Threatened Species 2010: e.T57832A86163060. . Downloaded on 22 June 2018.
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