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| (A-B) Chirixalus pantaiselatan Munir, Hamidy, Kusrini, Kennedi, Ridha, Qayyim, Rafsanzani & Nishikawa, 2021 RAFFLES BULLETIN OF ZOOLOGY. 69; |
Abstract
The Old World tree frog genus Chirixalus is distributed from northeastern India, southern China, continental Southeast Asia to Sumatra and Java. The species of this genus were previously assigned to the genera Chiromantis or Philautus. Here, we describe a newly discovered species of Chirixalus from Java. Chirixalus pantaiselatan, new species, is a small rhacophorid frog (male snout-vent length = 25.3–28.9 mm) that can be distinguished from all congeners using a combination of morphological, molecular, and advertisement call characteristics.
Key words. bioacoustics, Chirixalus, citizen science, taxonomy
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| the current distribution map of Chirixalus sp. (open diamond) and Chirixalus trilaksonoi (open circle). The distribution map was generated based on voucher material stored at the Museum Zooloogicum Bogoriense and sightings recorded from the ARK project on iNaturalist. Living specimen of Chirixalus trilaksonoi photographed by Wahyu Trilaksono. |
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| Chirixalus pantaiselatan, new species, MZB. Amph 30547 in night-time (A) and MZB. Amph 30548 in the daytime (B), uncollected Chiromantis trilaksonoi (C), and Feihyla vittiger, MZB. Amph 27238 (D). C & D photographed by Farits Alhadi. |
Chirixalus pantaiselatan, new species
Diagnosis. The new species was assigned to the genus
Chirixalus based on the following external characters:
horizontal pupil, tongue free and deeply notched, distinct
tympanum, opposed fingers, toes webbed, tips of fingers and
toes dilated into disks, outer metatarsal separated by web,
terminal phalanges obtuse (Boulenger, 1893). The new species
can be distinguished from its congeners by the combination
of the following characters: snout truncate; SVL 25.3–28.9
mm in males; uniform lateral body colouration, without a
light dorsolateral stripe from canthus rostralis through upper
orbital to the body or a light lateral stripe from under orbital
to mid-body; brown dorsal colouration, with an indistinct
transverse dark brown patch on intercanthal and upper
eyelid to interorbital area continued by an indistinct irregular
hexagon-like shape covering the parietoscapular region, and
a diamond-like shape on suprascapular region to mid-body;
distinct dark brown tympanum; third finger disk diameter
about half that of tympanum and unique advertisement call
consisting of short (2–9 notes), medium (11–17 notes),
and long calls (22–46 notes). Calls are 185.71–1,644.28,
1,420.78–2,708.46, and 3,292.29–7,055.79 ms in duration,
respectively, with note durations of 4.14–18.03, 4.82–15.19,
and 4.78–24.88 ms, respectively. Dominant frequencies
ranging from 2.34–3.94, 2.53–3.75, and 2.72–3.94 kHz for
calls of short, medium, and long duration.
Etymology. The specific name is an Indonesian adjective
incorporating the words “Pantai,” meaning “coast,” and
“Selatan,” meaning “south.” This name refers to the locality
of this species in southern Java.
Indonesian Name. Katak-pucat pantaiselatan
Misbahul Munir, Amir Hamidy, Mirza Dikari Kusrini, Umar Fhadli Kennedi, Mohammad Ali Ridha, Dzikri Ibnul Qayyim, Rizky Rafsanzani and Kanto Nishikawa. 2021. A New Species of Chirixalus Boulenger, 1893 (Anura: Rhacophoridae) from the Lowland Forests of Java. RAFFLES BULLETIN OF ZOOLOGY. 69; 219–234
