Rhacophorus rhyssocephalus Wolf 1936
Year: 2025
Type: other
Abstract: Rhacophorus rhyssocephalus Wolf, 1936 urn:lsid:zoobank.org:act: 077AFB25-B249-4473-9C17-D3E76F557FC5 Neotype. MZB Amph 33593 (Figure 4B, 4E, 5), an adult female collected on 5 August 2023, from Sahendaruman Mountain, Ulungpeliang, Kecamatan Tamako, Kabupaten Kepulauan Sangihe, North Sulawesi, Indonesia (03 o 30.887’N, 125 o 32.487E; 446 masl) by Efendi Sabinhaliduna, Wahyu Trilaksono, Syahfitri Anita, Isaac Krone, Sina Amini, María José Navarrete Méndez, Mark Herr, Jimmy McGuire. Isoneotype. MZB Amph 33594 from the same locality as the neotype collected by Rio Jimmi Kapona and Muhammad Abdi. Locality and collection time are the same as for the neotype. Diagnosis. We assign R. rhyssocephalus to the genus Rhacophorus and not Leptomantis based on the following characters: large body size; dermal folds along limbs present; supercloacal fold present (Jiang et al. 2019). R. rhyssocephalus can be distinguished from its congeners by having several conspicuous bony ridges on the dorsal surface of its head; a ridge with a granular structure above each tympanum and a U-shaped bony ridge filled with coarse bony grains running along the medial orbital margins and joining posteriorly in the parietal region (Figure 4E). Description of Neotype. An adult female (Figure 4B); SVL 86.7 mm; head depressed, and slightly longer (HL/SVL= 0.36) than wide (HW/SVL= 0.35); snout rounded in lateral view, projecting beyond mandible, longer (SL/SVL = 0.18) than eye diameter (ED/SVL = 0.11); canthus rostralis rounded and clearly curved; loreal region concave; nostril oval and slightly protuberant, without flap of skin, positioned vertically, closer to tip of snout than to eye (EN/SL = 0.59); internarial distance (IND/SVL =0.08) about slightly less than half of interorbital distance (IOD/SVL = 0.13); eyes relatively large (ED/SVL = 0.11), protuberant, pupil horizontally elliptical, twice as large as tympanum diameter (TD/SVL = 0.05); circular, distinct tympanum, three times the distance between the eye and the tympanum distance (ETD/SVL = 0.02); well-developed rows of vomerine teeth; choana oval shaped; tongue notched posteriorly; vocal sac and vocal slit absent. ......continued on the next page Forelimbs slender, relatively robust, forearm length is shorter than hand length (FLL/HAL = 0.75), and about one-fifth the length of the SVL (FLL/SVL= 0.21); a small, rounded inner palmar tubercle (IPTL/SVL= 0.07), about a quarter of third finger length (Fin3L/SVL= 0.26), outer one absent; finger length formula I <II <IV <III; tips of all fingers expanded into large disks with circum-marginal grooves; disk of third finger (Fin3DW/SVL=0.08) wider than tympanum diameter (Fin3DW/TD= 1.43); fingers almost full webbed; webbing formula I 1½-1½ II 1-1 III 1-1 IV (Figure 5D); subarticular tubercles rounded, formula 1, 1, 2, 2. Hindlimbs relatively long, slender, tibiotarsal articulation extends to the posterior of nostril when fully stretched leg adpressed to body; thigh (THL/SVL= 0.45) shorter than tibia (TL/SVL= 0.55), and almost the same as foot length(FL/SVL= 0.44); relative length of toes I<II<V<III
Authors: Herlambang, Alamsyah Elang Nusa, Sabinhaliduna, Efendi, Trilaksono, Wahyu, Anita, Syahfitri, Riyanto, Awal, Hamidy, Amir, Krone, Isaac, Amini, Sina, Méndez, María José Navarrete, Herr, Mark, Mcguire, Jimmy A.
Language: English
Subfield: Global and Planetary Change
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6949550779
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