Leptobrachella bourreti ( Dubois, 1983 )

Luong, Anh Mai, Phan, Tien Quang, Nguyen, Truong Quang, Tran, Tung Thanh, Ngo, Hien Thu Thi, van Schingen-Khan, Mona, Ziegler, Thomas & Pham, Cuong The, 2025, New records and an updated checklist of the herpetofauna from Tay Yen Tu Nature Reserve, north-eastern Vietnam, Biodiversity Data Journal 13, pp. e 157862-e 157862 : e157862-

Leptobrachella bourreti ( Dubois, 1983)

Materials

Type status: Other material. Occurrence: catalogNumber: IB A. 6374 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: 7F4C9BA0-8609-531D-B1AC-7E14722D3659; Taxon: scientificNameID: Leptobrachella bourreti ; scientificName: Leptobrachella bourreti ; class: Amphibia; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: bourreti ; scientificNameAuthorship: Dubois, 1983; Location: country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay Yen Tu NR ; verbatimElevation: 392 m; verbatimLatitude: 21°09.756’N; verbatimLongitude: 106°49.302’E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 18 May 2015; eventRemarks: collected by Pham T. C, van Schingen-Khan M., and Barthel L.; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen

Type status: Other material. Occurrence: catalogNumber: IB A. 6375 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: A5624967-9981-529E-931B-56F7B5FFCC91; Taxon: scientificNameID: Leptobrachella bourreti ; scientificName: Leptobrachella bourreti ; class: Amphibia; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: bourreti ; scientificNameAuthorship: Dubois, 1983; Location: country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay Yen Tu NR ; verbatimElevation: 476 m; verbatimLatitude: 21°09.835’N; verbatimLongitude: 106°48.638’E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 20 November 2024; eventRemarks: collected by Pham C. T., Nguyen T. V., Phan T. Q., and Vu Q. M; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen

Type status: Other material. Occurrence: catalogNumber: IB A. 6376 ; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: C326FC76-7C0B-5CF9-86BD-397DF4AF40C6; Taxon: scientificNameID: Leptobrachella bourreti ; scientificName: Leptobrachella bourreti ; class: Amphibia; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: bourreti ; scientificNameAuthorship: Dubois, 1983; Location: country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay Yen Tu NR ; verbatimElevation: 476 m; verbatimLatitude: 21°09.835’N; verbatimLongitude: 106°48.638’’E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 20 November 2024; eventRemarks: collected by Pham C. T., Nguyen T. V., Phan T. Q., and Vu Q. M; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen

Type status: Other material. Occurrence: catalogNumber: IB A. 6377 ; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: BD1B4CEE-3741-515A-8681-BACE9AD73334; Taxon: scientificNameID: Leptobrachella bourreti ; scientificName: Leptobrachella bourreti ; class: Amphibia; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: bourreti ; scientificNameAuthorship: Dubois, 1983; Location: country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay Yen Tu NR ; verbatimElevation: 347 m; verbatimLatitude: 21°09.837’N; verbatimLongitude: 106°49.314’E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 25 March 2025; eventRemarks: collected by Luong A. M., Pham C. T., and Phan T. Q.; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen

Description

Morphological characters of the specimens from Tay Yen Tu NR agreed well with descriptions of Dubois (1983) and Ohler et al. (2011). Size small (SVL 25.7–26.2 mm in two males and SVL 32.0– 33.6 mm in two females); head longer than wide (HL 10.4–10.6 mm, HW 8.9–9.2 mm in males and HL 12.5–12.9 mm, HW 11.1–11.6 in females); snout not protruding, longer than eye diameter (RL 4.0 mm, ED 3.4–3.7 mm in males and RL 3.7–5.1 mm, ED 3.8–4.6 mm in females); nostrils round, closer to the tip of snout than to eye (NS 1.6–1.9 mm, EN 2.3–2.5 mm in males and NS 1.6–1.9 mm, EN 2.9–3.2 mm in females); canthus rostralis round, loreal region slightly concave, obtuse; tympanum distinct; vomerine teeth absent; tongue notched posteriorly. Fore-limbs: Forearm slender, upper arm length (UAL 6.0– 6.4 mm in males and UAL 7.2–8.2 mm in females), forearm length (FAL 13.6 mm in males and FAL 15.9–17.3 mm in females); relative finger lengths I <II <IV <III, tips of fingers enlarged; fingers free of webbing. Hind-limbs: Thigh slender (FeL 12.7–13.6 mm in males; FeL 14.2–16.1 mm in females); relative toe lengths I <II <V <III <IV; tips of toes not enlarged; webbing rudimentary; tibio-tarsal articulation reaching to the eye when leg adpressed along body. Skin: Dorsum smooth with some small flattened pustules; supratympanic fold distinct; throat, chest, belly and underside of limbs smooth. Colouration in life: Dorsal surface of head and body grey with dark marking; flank grey with black spots; dorsal surface of limbs grey with dark transverse bars; belly cream; throat and chest mottled with dark brown (Fig. 1 ).

Distribution

In Vietnam, this species has been recorded from Lao Cai, Lai Chau and Ha Giang Provinces ( Nguyen et al. 2009, Frost 2025). Elsewhere, this species has been recorded from China and Thailand ( Frost 2025).

Ecology

Specimens were found between 19: 30 h and 20: 30 h, on the ground or rocks in streams. The surrounding habitat was mixed secondary forest of medium and small hardwoods with bamboo and shrubs. Air temperatures at the sites ranged from 20.1 ° C to 25.7 ° C and relative humidity ranged 83 % to 95 %.

Figures

Figure 1. Leptobrachella bourreti (male, IB A. 6373).