Rhacophorus arvalis

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Rhacophorus arvalis
Rhacophorus arvalis (farmland green treefrog).jpg
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Rhacophoridae
Genus: Rhacophorus
Species: R. arvalis
Binomial name
Rhacophorus arvalis
Lue, Lai, and Chen, 1995[2]

Rhacophorus arvalis is a species of frog in the family Rhacophoridae.[1][3][4][5] It is endemic to western and southwestern Taiwan and is present in agricultural areas of Chiayi, Yunlin, and Tainan Counties.[1][3][4] Common name farmland green treefrog has been coined for it.[3]

Description[edit]

Rhacophorus arvalis is a medium-sized treefrog; adult males measure 39–46 mm (1.5–1.8 in) and adult females 60–64 mm (2.4–2.5 in) in snout–vent length. The tympanum is visible, but it is dorsally and posteriorly concealed by the thin supratympanic fold. The fingers and the toes have well-developed discs and are webbed; webbing is weakly developed between the fingers but more prominent between the toes. Skin is granulated. The dorsum varies from dark green, green, yellowish-green, to nearly yellow. The upper lip is white, and the white color continues as a white stripe on the flanks; flank below the white stripe is dark purple. The lower lip and edge of gular region are silver gray to white.[2]

Habitat and conservation[edit]

Rhacophorus arvalis occurs in disturbed lowland (elevations below 1,000 m (3,300 ft)) agricultural areas where traditional farming practices prevails; it inhabits bamboo forests, orchards, sugar-cane fields, scrubland, and cultivated fields.[1] Reproduction involves a lek-type mating system where males form a chorus group on twigs or leaves near canopy. Female selects a male and carries him down to the damp forest floor (usually a temporary pool[2]), digs a hole, lays foamy eggs in the nest, and then covers the nest with decomposed bamboo leaves or other plant material.[4] The development to metamorphosis takes about 40 days.[2]

The population of Rhacophorus arvalis is fragmented.[4] It is threatened by habitat loss caused by infrastructure development for industry and human settlement, and by agricultural pollution. Conservation measures include maintaining traditional agricultural practices.[1] Taiwan Wildlife Conservation Act classifies its as "endangered",[5] as do the IUCN Red List of Threatened Species.[1]

References[edit]

  1. ^ a b c d e f Lue Kuangyang & Chou Wenhao (2004). "Rhacophorus arvalis". The IUCN Red List of Threatened Species. IUCN. 2004: e.T58974A11863580. doi:10.2305/IUCN.UK.2004.RLTS.T58974A11863580.en. Retrieved 15 January 2018.
  2. ^ a b c d Lue, Kuang-Yang; Lai, June-Shiang & Chen, Yue-Shung (1995). "A new Rhacophorus (Anura: Rhacophoridae) from Taiwan". Journal of Herpetology. 29 (3): 338–345. doi:10.2307/1564982.
  3. ^ a b c Frost, Darrel R. (2018). "Rhacophorus arvalis Lue, Lai, and Chen, 1995". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 7 October 2018.
  4. ^ a b c d Lue, Kuang-Yang (11 February 2011). "Rhacophorus arvalis". BiotaTaiwanica. Archived from the original on 4 Mar 2016. Retrieved 16 August 2012.
  5. ^ a b Lee, Pei-Fen. K. T. Shao, ed. "Rhacophorus arvalis Lue, Lai, & Chen, 1995". Catalogue of life in Taiwan. Biodiversity Research Center, Academia Sinica, Taiwan. Retrieved 7 October 2018.