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Description

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Oreophryne notata is easily distinguished from all congeners with the following combination of characters: small size (2>4>1, with the first finger one-half the length of the second. All fingers have well-developed terminal disks. The relative lengths of the toes are: 4>5>3>2>1, with the fifth toe only slightly longer than the third. The clavicle is that of a typical Oreophryne, with the procoracoid reaching the scapula as a narrow cartilaginous band. The dorsal coloration is grayish brown to tan. The only marking (other than the U-shape) is a “slightly darker area on and between the posterior half of the eyelids and faint traces of lumbar ocelli.” (Zweifel 2003). The face is darker than the dorsum and makes the inverted U shape more visible since it is white. Hindlimbs have a reddish tinge. The ventral surface is translucent gray with lighter speckles (Zweifel, 2003)[3539].

Reference

Zweifel, R.G. (2003). ''A new species of Microhylid frog, Genus Oreophryne, from Papua New Guinea.'' American Museum Novitates, 3419, 1-8.

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Distribution and Habitat

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Oreophryne notata has been reported from two localities about 325 km apart in the highlands of Papua New Guinea: Ialibu, in Southern Highlands Province, and Tabibul, Western Province. This species has only recently been described, so the full extent of its range is not known. The two reported localities are at 1920 m and 550 m in elevation, respectively. The type locality, Ialibu, is gently rolling country, with many small, low-gradient streams and rocky rivers. Much of the area is now grassland, though unlogged forest was within 2.5 km of Ialibu at the time of the holotype collection (Zweifel 2003).
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Life History, Abundance, Activity, and Special Behaviors

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Oreophryne notata calls from perches in forested areas, on leaves about a meter above the ground. The call is considered to be a series of “peeping” notes. At an ambient temperature of 15.4ºC, a call lasting 5.3 sec produced 21 notes, mostly unpulsed, with a duration of 0.10-0.13 sec each at a rate of 3.9 notes/sec. The dominant frequency was 3500-3600 Hz (Zweifel, 2003)[3539].
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Oreophryne notata

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Oreophryne notata is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and known from two localities, Ialibu, its type locality in the Southern Highlands Province, and Tabubil in the Western Province.[1][3] It might occur more widely.[1] The specific name notata is from Latin nota meaning a "mark" or "letter" and refers to the diagnostic U-like pattern on the lores.[2]

Description

Males grow to 19 mm (0.7 in) and females to 21 mm (0.8 in) in snout–vent length. The snout is almost truncate in dorsal view but vertical, slightly rounded in profile. The tympanum is small and indistinct, but the eyes are comparatively large. The fingers and toes have no webbing but bear well-developed terminal disks. The dorsum has gray-brown or tan ground color and shows only faint markings. The facial region is slightly darker than the dorsal ground color and has a characteristic, inverted U-shaped white mark just anterior to the eye. The hind legs have a reddish tint. The ventral surfaces are pale translucent gray with lighter flecks.[2]

The male advertisement call is a series of peeping notes with dominant frequency of 3500–3600 Hz.[2] Development is presumably direct, without free-living tadpole stage, as in other members of this genus.[1]

Habitat and conservation

Oreophryne notata is known from tropical rainforests at elevations of 550–1,920 m (1,800–6,300 ft) above sea level. They occur on vegetation above the ground, in shrubs and trees such as Pandanus. Males call at night.[1][2] The threats to this little known species are not known. It is not known to occur in any protected area.[1]

References

  1. ^ a b c d e f IUCN SSC Amphibian Specialist Group (2020). "Oreophryne notata". IUCN Red List of Threatened Species. 2020: e.T57926A152552877. doi:10.2305/IUCN.UK.2020-3.RLTS.T57926A152552877.en. Retrieved 15 November 2021.
  2. ^ a b c d e Zweifel, Richard G. (2003). "A new species of microhylid frog, genus Oreophryne, from Papua New Guinea". American Museum Novitates (3419): 1–8. doi:10.1206/0003-0082(2003)419<0001:ANSOMF>2.0.CO;2. hdl:2246/2848. S2CID 81157563.
  3. ^ a b Frost, Darrel R. (2018). "Oreophryne notata Zweifel, 2003". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 1 April 2018.
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Oreophryne notata: Brief Summary

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Oreophryne notata is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and known from two localities, Ialibu, its type locality in the Southern Highlands Province, and Tabubil in the Western Province. It might occur more widely. The specific name notata is from Latin nota meaning a "mark" or "letter" and refers to the diagnostic U-like pattern on the lores.

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