Thorius minydemus 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Caudata Plethodontidae

Scientific Name: Thorius minydemus
Species Authority: Hanken & Wake, 1998
Taxonomic Source(s): Frost, D.R. 2015. Amphibian Species of the World: an Online Reference. Version 6.0. New York, USA. Available at:

Assessment Information [top]

Red List Category & Criteria: Critically Endangered (Possibly Extinct) B2ab(iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Gabriela Parra-Olea, David Wake, James Hanken
Reviewer(s): Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young)
Listed as Critically Endangered because its area of occupancy is less than 10 km², its range is severely fragmented, and there is continuing decline in the extent and quality of its habitat in central Veracruz, Mexico.
Date last seen: 1999
Previously published Red List assessments:
2006 Critically Endangered (CR)
2004 Endangered (EN)

Geographic Range [top]

Range Description: This species is known only from the mountains north and west of Jalapa City, central Veracruz, Mexico, at 2,100-2,300 m asl.
Countries occurrence:
Possibly extinct:
Lower elevation limit (metres): 2100
Upper elevation limit (metres): 2300
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: It has apparently always been rare, although a very small number of specimens were found recently at Cerro Loma Alta (c. 1999) after intensive searching. A visit to the known locality of Cerro Loma Alta in 2003 yielded no salamanders, and researchers noted serious habitat degradation had taken place since the previous visit.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: Yes

Habitat and Ecology [top]

Habitat and Ecology: It inhabits cloud forest and pine-oak forest, with an abundance of bromeliads (especially in the oaks). It is terrestrial and can survive in somewhat degraded forest. It presumably reproduces by direct development.
Systems: Terrestrial

Threats [top]

Major Threat(s): The main threat is deforestation and alteration of the original forest habitats as a result of logging, mining, agriculture, livestock ranching, and human settlement. One of the known localities, Cerro Loma Alta, was visited in 2003 and was found to be virtually destroyed as a result of logging and invasive plants. Similarly, all areas surrounding La Joya are highly disturbed by extensive logging and mining. Between 2003 and 2004, the area of forest habitat available at this locality was halved due to the expansion of mining activities; the remaining available habitat was only about 15ha in 2004.

Conservation Actions [top]

Conservation Actions: It has not been found in any protected areas, and habitat protection for this species is urgently needed.

Citation: Gabriela Parra-Olea, David Wake, James Hanken. 2008. Thorius minydemus. The IUCN Red List of Threatened Species 2008: e.T59418A11936485. . Downloaded on 27 June 2016.
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