Nyctimystes narinosus, the common big-eyed treefrog, is a species of frog in the subfamily Pelodryadinae of the family Hylidae.[3][4] It is endemic to New Guinea and occurs in the Wahgi-Sepik Dividing Range and the Schrader Mountains, on both sides of the border between Papua (Indonesia) and Papua New Guinea.[3] There is, however, some uncertainty about the western limit of this species.[3] Despite its vernacular name, Nyctimystes narinosus is not a common species.[1]
| Nyctimystes narinosus | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Anura |
| Family: | Hylidae |
| Genus: | Nyctimystes |
| Species: | N. narinosus
|
| Binomial name | |
| Nyctimystes narinosus Zweifel, 1958
| |
| Synonyms[3] | |
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Description edit
The holotype, an adult female, measures 64 mm (2.5 in) in snout–vent length.[2] Males measure 48–59 mm (1.9–2.3 in) in snout–urostyle length.[5] The snout is high and blunt. The canthus rostralis is distinct. The tympanum is small but distinct,[2][5] partly obscured by the prominent supratympanic fold. The palpebral reticulum forms an irregular broken network of brown lines.[5] The fingers hava basal webbing whereas the toes are about three-quarters webbed.[2][5] The dorsum is usually chocolate brown, sometimes paler. There is a varying amount of cream to bright orange decoration consisting of scattered blotches and broad dorsolateral bands that reach the lores; this color may occasionally cover the entire dorsum. The brown coloration fades on the flanks to an off-white belly with brown speckling, with denser speckling on the throat. The lips are spotted, The iris is mid-brown. Males have a subgular vocal sac.[5]
The male advertisement call is a very loud "whistle". The tadpole is large and black or dark.[5]
Habitat and conservation edit
Ecology of Nyctimystes narinosus is poorly known.[1][5] It is a high-altitude species, being found at elevations of 1,500–2,500 m (4,900–8,200 ft) above sea level[1] or higher.[5] In the Schrader Mountains, it only occurs in Nothofagus forest, living high in the trees.[5] If similar to other Nyctimystes, the eggs are laid in torrential streams.[1]
Nyctimystes narinosus is a low-density species. It is not known to occur in any protected areas.[1] It is consumed locally.[5]
References edit
- ^ a b c d e f IUCN SSC Amphibian Specialist Group (2020). "Nyctimystes narinosus". IUCN Red List of Threatened Species. 2020: e.T55777A152543378. doi:10.2305/IUCN.UK.2020-3.RLTS.T55777A152543378.en. Retrieved 15 November 2021.
- ^ a b c d Zweifel, Richard G. (1958). "Results of the Archbold Expeditions. No. 78. Frogs of the Papuan hylid genus Nyctimystes". American Museum Novitates (1896): 1–51. hdl:2246/4567.
- ^ a b c d Frost, Darrel R. (2019). "Nyctimystes narinosus Zweifel, 1958". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 11 September 2019.
- ^ "Hylidae". AmphibiaWeb. University of California, Berkeley. 2019. Retrieved 11 September 2019.
- ^ a b c d e f g h i j Menzies, James (2014). "Notes on Nyctimystes species (Anura, Hylidae) of New Guinea: the Nyctimystes narinosus species group with descriptions of two new species". Transactions of the Royal Society of South Australia. 138 (1): 135–143. doi:10.1080/03721426.2014.10887197. S2CID 85211633.