Isthmohyla angustilineata
| Kingdom |
Phylum |
Class |
Order |
Family |
| ANIMALIA |
CHORDATA |
AMPHIBIA |
ANURA |
HYLIDAE |
| Scientific Name: |
Isthmohyla angustilineata |
| Species Authority: |
(Taylor, 1952) |
| Taxonomic Notes: |
This species was previously included in the genus Hyla but has recently been moved to the new genus Isthmohyla (Faivovich et al. 2005). |
Assessment Information
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| Red List Category & Criteria: |
Critically Endangered
A2ae
ver 3.1
|
| Year Published: |
2004 |
| Assessor/s: |
Frank Solís, Roberto Ibáñez, Alan Pounds, Federico Bolaños, Gerardo Chaves |
| Reviewer/s: |
Global Amphibian Assessment Coordinating Team (Simon Stuart, Janice Chanson, Neil Cox and Bruce Young) |
| Contributor/s: |
|
Justification:
Listed as Critically Endangered because of a drastic population decline, estimated to be more than 80% over the last three generations, inferred from the apparent disappearance of most of the population, perhaps due to chytridiomycosis.
|
Geographic Range
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| Range Description: |
This species occurs in the Cordillera de Tilarán, Cordillera Central, and Cordillera de Talamanca of Costa Rica and western Panama, from 1,500-2,040m asl (Savage 2002). |
| Countries: |
Native: Costa Rica; Panama |
| Range Map: |
Click here to open the map viewer and explore range. |
Population
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| Population: |
This is generally an uncommon species. The population is decreasing, but threats to the species remain unknown. In Costa Rica, the species has disappeared from Cerro Chompipe and Tapanti. It declined drastically in Monteverde, but a few individuals persisted until at least the late 1990s, and the particular site where they were found has not been visited since; there is a chance that it still survives at Monteverde. In Panama there is a scarcity of information on its distribution and abundance, though it appears to have declined, and the most recent record is from Parque Internacional La Amistad, in Chiriquí Province, in 1991.
|
| Population Trend: |
Decreasing
|
Habitat and Ecology
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| Habitat and Ecology: |
It is a nocturnal tree frog of humid lower montane rainforest. Breeding usually takes place in small puddles and water-filled depressions. Males call from leaves and twigs above the forest flood. Tadpoles are benthic (Savage 2002).
|
| Systems: |
Terrestrial; Freshwater |
| Major Threat(s): |
The reasons for the population decline of this species are not known with certainty, though it is likely to be due to chytridiomycosis, perhaps in association with climate change.
|
Conservation Actions
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| Conservation Actions: |
The current known range of this species falls entirely within protected areas (Parque Internacional La Amistad, Panama, and at least three protected areas in Costa Rica). Further survey work is required to determine the population status and trends of this species. In view of the threat of chytridiomycosis, ex-situ populations might need to be established.
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