Minyobates steyermarki 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Dendrobatidae

Scientific Name: Minyobates steyermarki (Rivero, 1971)
Common Name(s):
Spanish Sapito Rojo Del Yapacana
Dendrobates steyermarki Rivero, 1971
Taxonomic Source(s): Frost, D.R. 2014. Amphibian Species of the World: an Online Reference. Version 6 (27 January 2014). New York, USA. Available at: (Accessed: 27 January 2014).

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B2ab(iii) ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Needs updating
Assessor(s): Enrique La Marca, Celsa Señaris
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 probably less than 10km2, all individuals are in a single sub-population, and the extent of its forest habitat on the Cerro Yapacana is declining.

Geographic Range [top]

Range Description:This species is restricted to Cerro Yapacana, at elevations from 600-1,300m asl, in Amazonas state, Venezuela.
Countries occurrence:
Venezuela, Bolivarian Republic of
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:According to Gorzula and Señaris (1999) this frog is exceedingly common in bromeliads on the summit, and it is possible to collect hundreds in just a few hours. It is still found in great numbers.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It occurs in terrestrial bromeliads in montane tepui forest. Breeding probably takes place in bromeliads.

Threats [top]

Major Threat(s): Intensive open gold mining in the area is a major threat to the species' habitat. Barrio and Fuentes (1999) reported the illegal collection and exportation of some 150 specimens to Germany, and other collections for scientific purposes. Wildfires might also be a threat to the species' habitat.

Conservation Actions [top]

Conservation Actions: Cerro Yapacana is a Venezuelan natural monument, like most other tepuis in the region. Surveys are necessary to monitor the population trends of this species. Measures are also required to combat illegal trade of this species, and to regulate the mining activities so that the survival of the species is not jeopardised.

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
1. Forest -> 1.9. Forest - Subtropical/Tropical Moist Montane
2. Land/water management -> 2.1. Site/area management
3. Species management -> 3.1. Species management -> 3.1.1. Harvest management
3. Species management -> 3.1. Species management -> 3.1.2. Trade management

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education
3. Energy production & mining -> 3.2. Mining & quarrying
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

5. Biological resource use -> 5.1. Hunting & trapping terrestrial animals -> 5.1.1. Intentional use (species is the target)
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

9. Pollution -> 9.2. Industrial & military effluents -> 9.2.3. Type Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

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

♦  Pets/display animals, horticulture
 International : ✓ 

Bibliography [top]

Barrio Amorós, C.L. 2001. Amphibian decline in Venezuela - The state of knowledge. FrogLog: 2-4.

Barrio Amorós, C.L. 2004. Amphibians of Venezuela Systematic List, Distribution and References, An Update. Review of Ecology in Latin America 9(3): 1-48.

Barrio, C.L. and Fuentes, O. 1999. Sinopsis de la familia Dendrobatidae (Amphibia: Anura) de Venezuela. Acta Biologica Venezuelica: 1-10.

Frost, D.R. 1985. Amphibian Species of the World: A Taxonomic and Geographic Reference. Allen Press and the Association of Systematic Collections, Lawrence, Kansas.

Gorzula, S. 1988. Una nueva especie de Dendrobates (Amphibia: Dendrobatidae) del Macizo de Chimantá, Estado Bolívar, Venezuela. Memoria de la Sociedad de Ciencias Naturales La Salle: 143-149.

Gorzula, S. and Cerda, J. 1979. La herpetofauna del Territorio Federal Amazonas. MARNR.Serie Informes Científicos: 20.

Gorzula, S. and Señaris, J.C. 1998. Contribution to the herpetofauna of the Venezuelan Guayana I. A database. Scientiae Guaianae: 1-270.

IUCN. 2004. 2004 IUCN Red List of Threatened Species. Available at: (Accessed: 23 November 2004).

La Marca, E. 1992. Catalogo taxonomico, biogeografico y bibliografico de las ranas de Venezuela. Cuadernos Geograficos, Universidad de Los Andes: 1-197.

La Marca, E. 1995. Crisis de biodiversidad en anfibios de Venezuela: estudio de casos. In: Alonso-Amelot, M.E. (ed.), La Biodiversidad Neotropical y la Amenaza de las Extinciones, pp. 47-69. Universidad de Los Andes, Mérida.

La Marca, E. 1997. Lista actualizada de los anfibios de Venezuela. In: E. La Marca (ed.), Vertebrados Actuales y Fosiles de Venezuela, pp. 103-120. Museo de Ciencias y Tecnología de Mérida, Mérida.

Myers, C.W. 1987. New generic names for some Neotropical poison frogs (Dendrobatidae). Avulsos de Zoologia, Museu de Zoologia da Universidade de Sao Paulo 36(25): 301-306.

Rivero, J.A. 1971. Un nuevo e interesante Dendrobates (Amphibia, Salientia) del Cerro Yapacana de Venezuela. Kasmera: 389-396.

Rodríguez, J.P. and Rojas-Suárez, F. 1995. Libro Rojo de la Fauna Venezolana. Provita, Fundación Polar, Caracas.

Silverstone, P.A. 1975. A revision of the poison-arrow frogs of the genus Dendrobates Wagler. Natural History Museum of Los Angeles County Science Bulletin 21: 1-55.

Walls, J.G. 1994. Jewels of the Forests - Poison frogs of the Family Dendrobatidae. T.F.H. Publications, Inc., Neptune City, N.J.

Citation: Enrique La Marca, Celsa Señaris. 2004. Minyobates steyermarki. The IUCN Red List of Threatened Species 2004: e.T55202A11264562. . Downloaded on 26 April 2018.
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