Pseudoeurycea orchileucos 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Caudata Plethodontidae

Scientific Name: Pseudoeurycea orchileucos (Brodie, Mendelson & Campbell, 2002)
Common Name(s):
English Sierra de Juárez Worm Salamander
Lineatriton orchileucos Brodie, Mendelson & Campbell, 2002
Taxonomic Source(s): Frost, D.R. 2015. Amphibian Species of the World: an Online Reference. Version 6.0. New York, USA. Available at:
Taxonomic Notes: There is a question as to whether both Pseudoeurycea orchileucos and Pseudoeurycea orchimelas are distinct, valid species.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii) ver 3.1
Year Published: 2016
Date Assessed: 2014-11-30
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Lamoreux, J.
Contributor(s): Wake, D., Parra-Olea, G. & Rovito, S.
Facilitator/Compiler(s): Hobin, L. & Arias Caballero, P.
Listed as Critically Endangered because its extent of occurrence (EOO) is 93 km2, it occurs in one threat-defined location and there is continuing decline in the extent and quality of its habitat in northern Oaxaca, Mexico.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is only known from one threat-defined location of the northern slopes of the Sierra de Juarez, northern Oaxaca, Mexico, between 730-1,500 m asl (Lamoreux et al. 2015). Its extent of occurrence (EOO) and area of occupancy are 93 km2.
Countries occurrence:
Mexico (Oaxaca)
Additional data:
Estimated area of occupancy (AOO) - km2:92.5
Number of Locations:1
Lower elevation limit (metres):730
Upper elevation limit (metres):1500
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is very poorly known and only a few specimens have ever been recorded, despite much fieldwork having been carried out in its range. However, due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It lives in cloud forest, where it is terrestrial and fossorial, and does not survive in seriously disturbed habitats. It breeds by direct development and is not dependent upon water.
Continuing decline in area, extent and/or quality of habitat:Yes
Movement patterns:Not a Migrant

Use and Trade [top]

Use and Trade: There are no records of this species being utilized.

Threats [top]

Major Threat(s): The main threats are habitat loss due to logging, human settlement and expanding agriculture.

Conservation Actions [top]

Conservation Actions: Conservation Actions
It does not occur in any protected areas.

Conservation Needed
Habitat protection a priority to ensure the long-term survival of this species.

Research Needed
Further survey work is needed to determine its current population and taxonomic status.

Citation: IUCN SSC Amphibian Specialist Group. 2016. Pseudoeurycea orchileucos. The IUCN Red List of Threatened Species 2016: e.T59291A53980160. . Downloaded on 24 September 2018.
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