Leptobrachium masatakasatoi Matsui, 2013

Dau, Vinh Quang, Pham, Cuong The, Nguyen, Truong Quang, Thai, Toan Canh, Tran, Anh Dinh & Pham, Anh Van, 2024, New records of amphibians from Ha Tinh Province, Vietnam, Biodiversity Data Journal 12, pp. e 122598-e 122598 : e122598-122598

Leptobrachium masatakasatoi Matsui, 2013

Materials

Type status: Other material. Occurrence: catalogNumber: HDU 03111; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: 2 CE 20 B 14 - 6 A 4 E- 5 F 9 F- 99 AF-C 88 DC 30 BA 948; Taxon: scientificNameID: Leptobrachium masatakasatoi ; scientificName: Leptobrachium masatakasatoi ; class: Amphibia; order: Anura ; family: Megophryidae ; genus: Leptobrachium ; specificEpithet: masatakasatoi ; scientificNameAuthorship: Matsui, 2013; Location: country: Vietnam; countryCode: VN; stateProvince: Ha Tinh; county: Ha Tinh; municipality: Vu Quang; locality: near Huong Quang Commune; verbatimElevation: 1294 m; verbatimLatitude: 18 ° 14 ' 13.67 " N; verbatimLongitude: 105 ° 25 ' 54.23 " E; verbatimCoordinateSystem: WGS 84; Event: eventDate: Jume; eventTime: 2013; eventRemarks: collected by V. Q. Dau and T. C. Thai; Record Level: language: en; collectionCode: Amphibians; basisOfRecord: PreservedSpecimen

Description

Morphological characters of the specimen from Ha Tinh Province matched descriptions of Matsui (2013) and Pham et al. (2016): Body elongate, SVL 58.6 mm in male (n = 1). Head wider than long (HL 25.6 mm, HW 26.1 mm); snout round, barely projecting beyond upper jaw (RL 10.5 mm), longer than horizontal diameter of eye (ED 8.2 mm); canthus sharp, straight; loreal region oblique, moderately concave; nostril lateral, closer to tip of snout than to eye (NS 4.8 mm, EN 5.7 mm); interorbital space flat, broader than upper eyelid and internarial distance (IOD 7.1 mm, UEW 6.4 mm, IN 4.4 mm); tympanum indistinct; vomerine teeth absent; tongue heart-shaped, notched posteriorly; vocal openings absent. Fore-limb long (HAL 33.7 mm); relative finger lengths II < IV <I < III; fingers without dermal fringe, free of webbing; tips of fingers round, slightly swollen; palmar tubercles two, oval; nuptial pads absent. Hind-limb slender, thigh longer than tibia (FL 26.7 mm, TbL 22.6 mm, TbL / SVL 38.5 %); relative toe lengths I < II < V < III < IV; tips of toes slightly swollen; webbing formula I 1 – 1 II 1 – 1 III 1 – 2 IV 2 – 1 V; tibiotarsal articulation reaching to posterior margin of tympanum when limb adpressed along body; inner metatarsal tubercle distinct, as long as of toe I.

Skin: Dorsal surface with fine network of ridges, tubercles present in the posterior region of sacrum, more distinct in anterior part of vent; upper lip without spines in male; supratympanic fold present, from posterior edge of eye to axilla; flanks granular; throat and chest asperities; belly and ventral surfaces of limbs smooth, except for granular thigh.

Colouration in life: Dorsal surface of head reddish-brown, with some dark spots on upper eyelid, back with irregularly black spots; supratympanic fold edged in black below; flank light brown with large black spots; anterior part of thigh with large dark spots; dorsal limb light brown with dark crossbars; ventral surface with irregular brown and cream markings (Fig. 2 ).

Distribution

In Vietnam, this species was recorded from Son La and Nghe An Provinces ( Pham et al. 2016, Do et al. 2017). Elsewhere, this species is known from Laos ( Frost 2024).

Ecology

The specimen was found on the ground near a small stream at 19: 15 h pm. The surrounding habitat was evergreen forest of large hardwood and shrubs.

Figures

Figure 2. Leptobrachium masatakasatoi (adult male) from Ha Tinh Province, Vietnam. Photo by V. Q. Dau.