Monday, September 25, 2017

[Herpetology • 2017] A Taxonomic Revision of the Philautus (Anura: Rhacophoridae) of Sumatra with the Description of Four New Species; P. amabilis, P. polymorphus, P. thamyridion & P. ventrimaculatus

Philautus amabilis, P. thamyridion & P. ventrimaculatus
Wost, Riyanto, Hamidy, Kurniawan, Smith & Harvey, 2017 

This paper is the first taxonomic treatment of Sumatran Philautus since the early 20th century. We redescribe P. cornutus and P. petersi from new specimens, restrict P. petersi to Great Natuna Island, and reinstate the name P. larutensis for the populations on Borneo, Peninsular Malaysia, and Sumatra. We then synonymize P. similis with P. larutensis. We report Sumatran populations of P. kerangae and P. refugii, two species previously thought to be endemic to Borneo and discuss the presence of P. aurifasciatus on the island. We describe four new species of Philautus collected during large-scale herpetological surveys of Sumatra between 2013 and 2015 and propose a hypothesis of their relationship to the other Sunda Shelf Philautus on the basis of 16S ribosomal ribonucleic acid sequences. Additionally, we provide a key to the Philautus of Sumatra. In the course of this work we transfer P. vittiger from Java to the genus Chiromantis.

Keywords: Anuran taxonomy, Biodiversity, Biogeography, Sunda Shelf

Philautus amabilis, P. polymorphus, P. thamyridion & P. ventrimaculatus

Wost, Riyanto, Hamidy, Kurniawan, Smith & Harvey, 2017

 Previously Described Species 

• Philautus cornutus (Boulenger 1920)
• Philautus kerangae Dring 1987
• Philautus larutensis (Boulenger 1900)  
• Philautus petersi (Boulenger 1900) 
• Philautus refugii Inger and Stuebing 1996

New Species 

FIG. 10.—Philautus amabilis. MZB.Amph.26879, holotype, male, 20.79 mm snout–vent length (SVL), Bur Ni Telong Aceh (A and B). MZB.Amph.26887, female, 22.46 mm SVL, Gunung Marapi, Bengkulu (C and D). UTA-A 63816, male, 20.64 mm SVL, Gunung Sibuatan, Sumatera Utara (E and F).

• Philautus amabilis sp. nov.

Etymology.—The name amabilis is a masculine adjective from Latin meaning lovely. It is an apt description of this charming species.

FIG. 11.—Philautus polymorphus. MZB.Amph.26789, holotype, male 25.30 mm snout–vent length (SVL), Gunung Patah, Sumatera Selatan (A). MZB.Amph.26755, female, 25.89 mm SVL, Gunung Kerinci, Jambi (B). UTA-A 63953, female 28.93 mm SVL, Gunung Dempo, Sumatera Selatan (C). UTAA 63935, male, 21.28 mm SVL, Sumatera Barat Province, Gunung Marapi (D). MZB.Amph.26814, female, 26.04 mm SVL, Bukit Kaba, Bengkulu (E). UTAA 63909, female, 23.02 mm SVL, Gunung Daun, Bengkulu (F).

• Philautus polymorphus sp. nov.

Etymology.—The name polymorphus is a masculine adjective derived from the Greek words poly, meaning many, and morph, meaning shape or form. The name refers to the high levels of phenotypic variation displayed in this species.

FIG. 12.—Philautus thamyridion. MZB.Amph.26763, holotype, male 17.88 mm, Gunung Pesawaran, Lampung (A and B). UTA-A 63987, paratype, female, 19.82 mm snout–vent length (SVL), Gunung Pesawaran, Lampung (C). UTA-A 63976, female, 19.91 mm SVL, Gunung Daun, Bengkulu (D). MZB.Amph.26796, male, 17.37 mm SVL Gunung Patah, Sumatera Selatan (E). UTA-A 63982, male, 15.42 mm SVL, vicinity of Ngarip, Lampung, showing black spot surrounding vent and black coloration on inferior surface of tarsus (F).

• Philautus thamyridion sp. nov. 

Etymology.—The new name, thamyridion, is a masculine noun in apposition and is a diminutive of the proper name Thamyris, a boastful singer of Greek mythology. The name refers to this species’ small size and loud distinctive call.

FIG. 13.—Philautus ventrimaculatus. MZB.Amph.26815, holotype, female, 21.61 mm snout–vent length (SVL), Gunung Dempo, Sumatera Selatan (A and B). UTA-A 63882, paratype, female, 21.22 mm SVL, Gunung Dempo, Sumatera Selatan (C and D). UTA-A 63873, female, 16.87 mm SVL, Gunung Patah, Sumatera Selatan (E and F).  

• Philautus ventrimaculatus sp. nov. 

Etymology.—The specific name ventrimaculatus is a masculine adjective derived from the latin words venter, referring the stomach, and macula, meaning spot. The name is in reference to the distinctive pattern on the venter of this species.

Elijah Wost, Awal Riyanto, Amir Hamidy, Nia Kurniawan, Eric N. Smith and Michael B. Harvey. 2017. A Taxonomic Revision of the Philautus (Anura: Rhacophoridae) of Sumatra with the Description of Four New Species. Herpetological Monographs. 31(1); 70-113.  DOI: 10.1655/HERPMONOGRAPHS-D-16-00007 


Specimens of the newly described species — Philautus amabilis, Philautus polymorphus, Philautus thamyridion and Philautus ventrimaculatus — were collected from 2013 to 2015 in jungles over 1,000 meters above sea level.
Four new toads discovered in Sumatra   @Mongabay

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