Craugastor obesus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Craugastoridae

Scientific Name: Craugastor obesus (Barbour, 1928)
Eleutherodactylus obesus (Barbour, 1928)
Syrrhopus obesus Barbour, 1928
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:
Taxonomic Notes: This species was previously included in the genus Eleutherodactylus (Crawford and Smith 2005). It was removed from synonymy of Craugastor punctariolus (Campbell and Savage 2000).

Assessment Information [top]

Red List Category & Criteria: Critically Endangered (Possibly Extinct) D ver 3.1
Year Published: 2014
Date Assessed: 2013-07-14
Assessor(s): IUCN SSC Amphibian Specialist Group & NatureServe
Reviewer(s): Angulo, A.
Contributor(s): Jaramillo, C., Bolaños, F., Solís, F., Chaves, G., Savage, J., Fuenmayor, Q. & Ibáñez, R.
Facilitator/Compiler(s): Young, B.E. & Nowakowski , J.

Listed as Critically Endangered because, given recent survey efforts and lack of records, and the possibility that this species might have been impacted by chytridiomycosis, it is inferred that it is either possibly extinct or if there is still an extant population, that it is very small (<50 mature individuals). However, additional sampling effort is needed before it can be declared Extinct or re-assessed under a different criterion.

Date last seen: 1984
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs on the Atlantic slopes of south-eastern Costa Rica and north-western Panama at an altitude of 400-1,450 m asl. Its range, taken as a proxy for extent of occurrence (EOO), is estimated at 4,014 km2.

Countries occurrence:
Possibly extinct:
Costa Rica; Panama
Additional data:
Lower elevation limit (metres):400
Upper elevation limit (metres):1450
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is a rare species in Costa Rica, being recorded very infrequently. The last record for Costa Rica was in 1984, but there have been few surveys in this region (G. Chaves pers. comm. 2013). The last attempt to locate the species in Costa Rica was in 2009, but it was unsuccessful (F. Bolaños pers. comm. August 2010). In Panama it is believed to have experienced past declines in the Reserva Forestal Fortuna, Chiriquí. Recent sampling efforts within its range in Panama have not produced any new observations of C. obesus (Hertz et al. 2012). 

Current Population Trend:Unknown
Additional data:
Population severely fragmented:Unknown

Habitat and Ecology [top]

Habitat and Ecology:This species can be found in the spray zone on rocks, boulders, and cliff faces in the middle of moderate-sized cascading streams in lowland moist forest, premontane and lower montane wet forest and rainforest. It does not occur in modified habitats. It presumably breeds by direct development.
Systems:Terrestrial; Freshwater

Use and Trade [top]

Use and Trade:

There are no reports of this species being utilized.

Threats [top]

Major Threat(s): The main threat to this species is believed to be the disease chytridiomycosis, and it has already disappeared from one site where chytrid fungus was found.

Conservation Actions [top]

Conservation Actions: It has been recorded from Parque Internacional La Amistad (Costa Rica and Panama) and two protected areas in Panama. Given indications of population declines in Panama, this species should be monitored. Further research is needed into the range and ecology of this species, as well as the impact of chytridiomycosis. In Costa Rica, the species is known only from two localities, which are outside of protected areas (G. Chaves pers. comm. 2013).

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
suitability:Suitable season:resident major importance:Yes
1. Forest -> 1.9. Forest - Subtropical/Tropical Moist Montane
suitability:Suitable season:resident major importance:Yes
5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
suitability:Suitable season:resident major importance:Yes
2. Land/water management -> 2.1. Site/area management

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Conservation sites identified:No
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education
8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.2. Named species [ Batrachochytrium dendrobatidis ]
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
3. Monitoring -> 3.1. Population trends

Bibliography [top]

Campbell, J.A. and Savage, J.M. 2000. Taxonomic reconsideration of Middle American frogs of the Eleutherodactylus rugulosus group (Anura: Leptodactylidae): A reconnaissance of subtle nuances among frogs. Herpetological Monographs 14: 186-292.

Crawford, A.J. and Smith, E.N. 2005. Cenozoic biogeography and evolution in direct-developing frogs of Central America (Leptodactylidae: Eleutherodactylus) as inferred from a phylogenetic analysis of nuclear and mitochondrial genes. Molecular Phylogenetics and Evolution 25: 536-555.

Hertz, A., Lotzkat, S. Carrizo, A., Ponce, M., Köhler, G. and Streit, B.. 2012. Field notes on findings of threatened amphibian species in the central mountain range of western Panama. Amphibian and Reptile Conservation 6(2): 9-30.

IUCN. 2014. The IUCN Red List of Threatened Species. Version 2014.1. Available at: (Accessed: 12 June 2014).

Savage, J.M. 2002. The Amphibians and Reptiles of Costa Rica: A Herpetofauna between two Continents, between two Seas. University of Chicago Press, Chicago.

Citation: IUCN SSC Amphibian Specialist Group & NatureServe. 2014. Craugastor obesus. The IUCN Red List of Threatened Species 2014: e.T56799A3050126. . Downloaded on 14 August 2018.
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