|Scientific Name:||Thorius minydemus 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: http://research.amnh.org/herpetology/amphibia/index.html.|
|Red List Category & Criteria:||Endangered B1ab(iii) ver 3.1|
|Assessor(s):||IUCN SSC Amphibian Specialist Group|
|Contributor(s):||Wake, D., Pineda, E., Parra-Olea, G., Hanken, J. & Aguilar-López, J.|
|Facilitator/Compiler(s):||Arias Caballero, P. & Hobin, L.|
Listed as Endangered because its extent of occurrence (EOO) is 479 km2, the population is severely fragmented and there is continuing decline in the extent and quality of its habitat in central Veracruz, Mexico.
|Previously published Red List assessments:|
|Range Description:||This species is known from the same area as in the last assessment: the mountains north and west of Xalapa City, central Veracruz, Mexico, at 2,100-2,500 m asl. No changes have been made to its range map, but its extent of occurrence (479 km2) and area of occupancy (130 km2) have been calculated.|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||It has apparently always been rare, although a very small number of specimens were found at Cerro Loma Alta (c. 1999) after intensive searching. A visit to Cerro Loma Alta in 2003 yielded no specimens and researchers noted serious habitat degradation had taken place since the previous visit. Sean Rovito found one specimen at La Joya in 2009. Recent studies (2010-2014) performed by Eduardo Pineda and his group at INECOL found 2 specimens, one at the type locality ("the vicinity of La Joya") and a second at Reserva San Juan del Monte, Veracruz. The population is believed to be severely fragmented and, due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.|
|Current Population Trend:||Decreasing|
|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.|
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Movement patterns:||Not a Migrant|
|Use and Trade:||There are no records of this species being utilized.|
|Major Threat(s):||The main threat is deforestation and alteration of the original forest habitat from logging, mining, agriculture (including slash and burn practices), 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 15 ha in 2004.|
It is necessary to reconnect the remaining forest patches with vegetation corridors and to implement educational programs about this species to eradicate the false idea that this amphibian is dangerous (E. Pineda & J.L. Aguilar-López pers. obs. Red List Assessment Workshop, June 2014). Protection of the species remaining habitat is already required.
In light of the small number of records, but severe threats, further field surveys at known sites and the wider region are needed to better understand the species distribution, and population monitoring is required to prevent numbers falling too low without futher intervention on behalf of the species.
|Citation:||IUCN SSC Amphibian Specialist Group. 2016. Thorius minydemus. The IUCN Red List of Threatened Species 2016: e.T59418A53986401.Downloaded on 24 October 2017.|
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