Nyctimystes perimetri

Nyctimystes perimetri, also known as the archipelago big-eyed treefrog, is a species of frog in the family Pelodryadidae,[3] also treated as the subfamily Pelodryadinae in the family Hylidae.[1][4] It is endemic to Papua New Guinea and currently only known from the Louisiade Archipelago (Tagula and Rossel Islands), although it might also occur in the Owen Stanley Range of the mainland Papua New Guinea.[3] It has also been suggested that the Rossel Island population might represent a distinct species.[1]

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

Description

Adult males measure 48–52 mm (1.9–2.0 in) and adult females, based on a single specimen, about 67 mm (2.6 in) in snout–vent length. The tympanum is small but distinct; supratympanic fold is present. The canthus rostralis is distinct. The palpebral venation consists of oblique to near-vertical lines, with only few horizontal interconnections. The outer fingers are about half-webbed, whereas the toes are webbed to the base of the discs or slight less. Skin is minutely granular dorsally and coarsely granular ventrally. Preserved specimens are lead-colored dorsally, almost without any pattern. However, the limbs have some indistinct spotting and banding. The chest and the abdomen are unpigmented, or with some yellow pigment in the chest and the throat.[2]

Habitat and conservation

Nyctimystes perimetri occurs along small (about 1–2 m wide) tributary streams of large, forested lowland streams at elevations of 150–350 m (490–1,150 ft) above sea level. Breeding probably occurs in streams where the tadpoles develop. It is a common species in suitable habitat. There are no known threats to this species; habitat on Tegula and Rossel remains in reasonable condition, despite logging in the past.[1]

References
  1. Richards, S.; Allison, A. & Kraus, F. (2006). "Nyctimystes perimetri". IUCN Red List of Threatened Species. 2006: e.T55781A11354784. doi:10.2305/IUCN.UK.2006.RLTS.T55781A11354784.en. Retrieved 4 January 2019.
  2. 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.
  3. Frost, Darrel R. (2018). "Nyctimystes perimetri Zweifel, 1958". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 4 January 2019.
  4. "Hylidae". AmphibiaWeb. University of California, Berkeley. 2019. Retrieved 4 January 2019.
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