Nyctimystes narinosus

Nyctimystes narinosus, the common big-eyed treefrog, is a species of frog in the family Pelodryadidae,[2] or alternatively, subfamily Pelodryadinae in the family Hylidae.[1][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.[2] There is, however, some uncertainty about the western limit of this species.[2] Despite its vernacular name, Nyctimystes narinosus is not a common species.[1]

Nyctimystes narinosus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Pelodryadidae
Genus: Nyctimystes
Species:
N. narinosus
Binomial name
Nyctimystes narinosus
Zweifel, 1958
Synonyms[2]
  • Nyctimystes narinosa Zweifel, 1958[3]
  • Litoria narinosa (Zweifel, 1958)

Names

It is known as mabas in the Kalam language of Papua New Guinea.[5]

Description

The holotype, an adult female, measures 64 mm (2.5 in) in snout–vent length.[3] Males measure 48–59 mm (1.9–2.3 in) in snout–urostyle length.[6] The snout is high and blunt. The canthus rostralis is distinct. The tympanum is small but distinct,[3][6] partly obscured by the prominent supratympanic fold. The palpebral reticulum forms an irregular broken network of brown lines.[6] The fingers hava basal webbing whereas the toes are about three-quarters webbed.[3][6] 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.[6]

The male advertisement call is a very loud "whistle". The tadpole is large and black or dark.[6]

Habitat and conservation

Ecology of Nyctimystes narinosus is poorly known.[1][6] 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.[6] In the Schrader Mountains, it only occurs in Nothofagus forest, living high in the trees.[6] 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.[6]

References
  1. Richards, S. & Zweifel, R. (2004). "Nyctimystes narinosus". IUCN Red List of Threatened Species. 2004: e.T55777A11353592. doi:10.2305/IUCN.UK.2004.RLTS.T55777A11353592.en. Retrieved 11 September 2019.
  2. 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.
  3. Zweifel, Richard G. (1958). "Results of the Archbold Expeditions. No. 78. Frogs of the Papuan hylid genus Nyctimystes". American Museum Novitates. 1896: 1–51.
  4. "Hylidae". AmphibiaWeb. University of California, Berkeley. 2019. Retrieved 11 September 2019.
  5. Bulmer, Ralph N.H. and Michael Tyler. 1968. Karam classification of frogs. Journal of the Polynesian Society 77(4): 621–639.
  6. 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.
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