Gracixalus trieng, also known as the Trieng tree frog or Trieng bushfrog, is a species of frog in the family Rhacophoridae.[2][3] It is endemic to Vietnam and is only known from the area of its type locality, Ngoc Linh Nature Reserve in Đắk Glei District, Kon Tum Province.[2] Mount Ngoc Linh and adjacent peaks form an isolated high-elevation area and the species is unlikely to exist elsewhere.[1]
| Gracixalus trieng | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Anura |
| Family: | Rhacophoridae |
| Genus: | Gracixalus |
| Species: | G. trieng
|
| Binomial name | |
| Gracixalus trieng | |
  | |
| Gracixalus trieng is only known from the Đắk Glei District in central Vietnam | |
Etymology
editThe specific name trieng refers to the local Trieng people who assisted the describers of this species in their field work.[1]
Description
editAdult males measure 37–41 mm (1.5–1.6 in) in snout–vent length (SVL). Adult females are unknown; two juveniles measured 20–24 mm (0.8–0.9 in) in SVL. The body is robust. The snout is rounded. The tympanum and supratympanic fold are distinct. The fingers are narrow and bear well-developed discs; there is basal webbing between the fingers II–IV. The toes bear well-developed discs and are webbed. Skin texture varies from almost completely smooth to having scattered low tubercles. The typical diurnal coloration is dark brown dorsally and dark pinkish brown ventrally, with distinct dark brown dorsal markings, where the typical nocturnal coloration is mostly pale yellow dorsally and pale pink ventrally, without the distinct dorsal markings.[1]
Advertisement call is unknown, but males do have a vocal sac.[1]
Habitat
editGracixalus trieng inhabits montane evergreen forest at elevations of 1,716–2,055 m (5,630–6,742 ft) above sea level; searches at lower elevations did not reveal this species. All adult males were found in tree holes, the breeding habitat of this species. Also juvenile frogs are arboreal.[1]
Conservation
editAs of November 2021, this species has not been included in the IUCN Red List of Threatened Species.[4] However, Rowley and colleagues suggest that it would qualify as "endangered" because of its restricted range (extent of occurrence likely less than 1000 km2), within which deforestation leading to habitat loss is occurring.[1]
Further reading
edit- Rowley, Jodi (20 May 2020). "An unusual tree frog discovered in the mountains of Vietnam". Australian Museum. — Includes photographs of the frog and its habitat
References
edit- ^ a b c d e f g Rowley, Jodi J. L.; Le, Duong Thi Thuy; Hoang, Huy Duc; Cao, Trung Tien & Dau, Vinh Quang (2020). "A new species of phytotelm breeding frog (Anura: Rhacophoridae) from the Central Highlands of Vietnam". Zootaxa. 4779 (3): 341–354. doi:10.11646/zootaxa.4779.3.3. S2CID 219778820.
- ^ a b c Frost, Darrel R. (2021). "Gracixalus trieng Rowley, Le, Hoang, Cao, and Dau, 2020". Amphibian Species of the World: An Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 14 November 2021.
- ^ "Gracixalus trieng". AmphibiaWeb. University of California, Berkeley. 2021. Retrieved 14 November 2021.
- ^ "IUCN Red List of Threatened Species". Retrieved 14 November 2021.