Nanohyla petrigena
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Microhylidae
Genus: Nanohyla
Species:
N. petrigena
Binomial name
Nanohyla petrigena
(Inger and Frogner, 1979)
Synonyms[2]
  • Microhyla petrigena Inger and Frogner, 1979

Nanohyla petrigena is a species of frog in the family Microhylidae.[2] It is found in northern and central Borneo (Brunei, southeastern Sabah and central Sarawak, Malaysia, and central Kalimantan, Indonesia) and in the Sulu Archipelago of the Philippines. The common names pothole narrow-mouthed frog and Kapit rice frog have been coined for the species.[1][2]

Taxonomy

N. petrigena was formerly placed in the genus Microhyla, but a 2021 study using morphological and phylogenetic evidence moved nine species (including N. petrigena) to a new genus, Nanohyla.[2][3]

Description

Nanohyla petrigena is a small frog: adult males measure 14–16 mm (0.6–0.6 in) and adult females 15–18 mm (0.6–0.7 in) in snout–vent length.[4] Its hands have only three fingers. The dorsum is colored in shades of brown. There are dark markings on the shoulder and a light band on the flank. The venter is dark with an irregular white blotch.[5]

The male advertisement call is a single, pulsed note, emitted in series consisting of maximally 15 notes. Call repetition rate is about 0.7 per second, declining towards the end of the series.[4]

Habitat and conservation

Nanohyla petrigena occurs in lowland primary rainforests at elevations below 700 m (2,300 ft).[1] It lives in leaf litter. Breeding takes place in small pot-holes on rocky banks of clear streams and rivers and appears to be restricted to certain nights.[1][4] The egg masses float on the surface of these pools.[4] The tadpoles feed in mid-water.[5]

This species appears not to be able to adapt to modified habitats. It is threatened by habitat loss caused by logging and conversion in palm oil plantations; the type locality has already been destroyed and species has likely disappeared from there. However, the species occurs in several protected areas.[1]

References

  1. 1 2 3 4 5 IUCN SSC Amphibian Specialist Group (2018). "Nanohyla petrigena". IUCN Red List of Threatened Species. 2018: e.T57889A58478677. doi:10.2305/IUCN.UK.2018-2.RLTS.T57889A58478677.en. Retrieved 15 November 2021.
  2. 1 2 3 4 Frost, Darrel R. (2021). "Nanohyla petrigena (Inger and Frogner, 1979)". Amphibian Species of the World: An Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 15 January 2021.
  3. ↑ Gorin, Vladislav A.; Scherz, Mark D.; Korost, Dmitriy V. & Poyarkov, Nikolay A. (2021-12-01). "Consequences of parallel miniaturisation in Microhylinae (Anura, Microhylidae), with the description of a new genus of diminutive South East Asian frogs". Zoosystematics and Evolution. 97 (1): 21–54. doi:10.3897/zse.97.57968.
  4. 1 2 3 4 Dehling, J. M. (2010). "Advertisement calls of two species of Microhyla (Anura: Microhylidae) from Borneo". Salamandra. 46 (2): 114–116.
  5. 1 2 Haas, A.; Das, I. & Hertwig, S.T. (2017). "Microhyla petrigena Pothole Narrow-mouthed Frog". Frogs of Borneo. Retrieved 2 March 2019.
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