Description
Known only from the preserved holotype (Günther 1869). Adult male 17.4 mm SVL. Head dorsally flat. Snout angle of about 80 degrees (category 2 of Manamendra-Arachchi and Pethiyagoda et al. 2005), with sharp canthal edges and concave loreal regions. Interorbital space flat; internarial space concave. Tympanum discernible, oval-shaped, and vertically oriented, with prominent supratympanic fold. Pineal ocellus lacking. Vomerine teeth lacking. Lingual papilla not present. Lateral dermal fringe absent on fingers. Supernumerary tubercles present on palm and sole. Toes webbed medially. Calcar present. Tarsal tubercle present. Dorsum tuberculated; dorsal and lateral regions of head with glandular warts. Median dermal ridge runs from tip of snout to vent. Limbs have a few glandular warts dorsally. Upper flank smooth, with lower flank granular. Throat, chest, belly, and underside of thigh are all granular, but the chin is smooth. Male holotype lacks nuptial pads but has internal vocal slits (Manamendra and Pethiyagoda 2005).

Coloration in preservative: Uniform dark brown dorsum; limbs crossbarred (Manamendra and Pethiyagoda 2005).

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Sri Lanka

View distribution map in BerkeleyMapper.

Endemic to Sri Lanka, but the type locality is described only as "Ceylon" (Stuart et al. 2008). Habitat requirements are unknown (Stuart et al. 2008).

Life History, Abundance, Activity, and Special Behaviors
Known only from the holotype; Pseudophilautus nasutus has not been recorded since its description (Günther 1869). It is believed to have been a direct developer, like other species in the genus Pseudophilautus (Stuart et al. 2008).

Trends and Threats
The exact reason for this species' decline is not known, but it is believed that habitat loss was the major factor in its eventual extinction (Stuart et al. 2008).

Possible reasons for amphibian decline

General habitat alteration and loss

References

Günther, A. (1869). ''First account of species of tailless batrachians added to the collection of the British Museum.'' Proceedings of the Zoological Society of London, 1868, 478-499.

Manamendra-Arachchi, K., and Pethiyagoda, R. (2005). ''The Sri Lankan shrub-frogs of the genus Philautus Gistel, 1848 (Ranidae: Rhacophorinae), with description of 27 new species.'' Raffles Bulletin of Zoology, Supplement 12, 163-303.

Stuart, S., Hoffmann, M., Chanson, J., Cox, N., Berridge, R., Ramani, P., Young, B. (eds) (2008). Threatened Amphibians of the World. Lynx Edicions, IUCN, and Conservation International, Barcelona, Spain; Gland, Switzerland; and Arlington, Virginia, USA.

Species Account Citation: AmphibiaWeb 2010 Pseudophilautus nasutus <https://amphibiaweb.org/species/4438> University of California, Berkeley, CA, USA. Accessed Dec 3, 2024.

Citation: AmphibiaWeb. 2024. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 3 Dec 2024.

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