Oreophryne minuta

Oreophryne minuta is a species of frog in the family Microhylidae. It is endemic to Papua, Western New Guinea, and only known from its type locality in the Derewo River basin, in the mountains to the southeast of Cenderawasih Bay.[3] It is a very small frog (maximum size 11.5 mm (0.5 in)), and at the time of species description, the smallest Oreophryne species.[2]

Oreophryne minuta
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Microhylidae
Genus: Oreophryne
Species:
O. minuta
Binomial name
Oreophryne minuta
Richards and Iskandar, 2000[2]

Description

Adult males in the type series measure 9.2–11.5 mm (0.4–0.5 in) in snout–vent length; females are unknown. The snout is bluntly pointed in dorsal view and bluntly rounded in lateral profile. The tympanum is indistinct. The fingers and the toes have no webbing. The tips have faint terminal grooves but are not expanded into discs. Skin is smooth. The dorsum has scattered low tubercles forming an hourglass pattern. There are two distinctly larger tubercles on the mid-dorsum behind eyes. Alcohol-preserved specimens are pale brown to brown and have a dark band running from the tip of the snout through the eye, becoming a patchy lateral band.[2]

The male advertisement call consists of a series of distinctly pulsed, rapidly repeated notes lasting about 1–3 seconds and repeat at a rate of 6 s−1. The dominant frequency is about 6900–7500 Hz.[2]

Habitat and conservation

Oreophryne minuta is known from montane tropical rainforest at about 2,000 m (6,600 ft) above sea level. The types were collected from an extremely wet, boulder-filled gully. They were calling at night from within thick clumps of moss that covered the boulders and low tree branches, none higher than 2 m (7 ft) above the ground.[1][2]

Threats to this species are unknown. It is not known to occur in any protected areas.[1]

Derewo River basin in Western New Guinea
Derewo River basin in Western New Guinea
Oreophryne minuta is only known from the Derewo River basin, Western New Guinea

References
  1. IUCN SSC Amphibian Specialist Group (2020). "Oreophryne minuta". IUCN Red List of Threatened Species. 2020: e.T57923A152552788. doi:10.2305/IUCN.UK.2020-3.RLTS.T57923A152552788.en. Retrieved 16 November 2021.
  2. Richards, S. J. & Iskandar, D. T. (2000). "A new minute Oreophryne (Anura: Microhylidae) from the mountains of Irian Jaya, Indonesia". Raffles Bulletin of Zoology. 48: 257–262.
  3. Frost, Darrel R. (2018). "Oreophryne minuta Richards and Iskandar, 2000". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 4 April 2018.
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