Leptobrachella nahangensis (Lathrop, Murphy, Orlov & Ho, 1998)

Luong, Anh Mai, Do, Quyen Hanh, Hoang, Chung Van, Phan, Tien Quang, Nguyen, Truong Quang & Pham, Cuong The, 2022, New records of amphibians from Bac Kan Province, Vietnam, Biodiversity Data Journal 10, pp. 75595-75595 : 75595

Leptobrachella nahangensis (Lathrop, Murphy, Orlov & Ho, 1998)

Materials

Type status: Other material. Occurrence: catalogNumber: IEBR A.4885 ; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Leptobrachella nahangensis; class: Amphibia ; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: nahangensis; scientificNameAuthorship: Lathrop , Murphy , Orlov & Ho, 1998; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 696 m; verbatimLatitude: 22°16.418'N; verbatimLongitude: 105°30.483'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 25 August 2020; eventRemarks: collected by L. M. Anh, D. H. Quyen, and P. Q. Tien; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.4886 ; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Leptobrachella nahangensis; class: Amphibia ; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: nahangensis; scientificNameAuthorship: Lathrop , Murphy , Orlov & Ho, 1998; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 696 m; verbatimLatitude: 22°17.260'N; verbatimLongitude: 105°31.138'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 25 August 2020; eventRemarks: collected by L. M. Anh, D. H. Quyen, and P. Q. Tien; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.4887 ; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Leptobrachella nahangensis; class: Amphibia ; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: nahangensis; scientificNameAuthorship: Lathrop , Murphy , Orlov & Ho, 1998; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 697 m; verbatimLatitude: 22°16.807'N; verbatimLongitude: 105°31.748'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 26August 2020; eventRemarks: collected by L. M. Anh and D. H. Quyen; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.4888 ; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Leptobrachella nahangensis; class: Amphibia ; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: nahangensis; scientificNameAuthorship: Lathrop , Murphy , Orlov & Ho, 1998; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 697 m; verbatimLatitude: 22°16.807'N; verbatimLongitude: 105°31.748'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 26August 2020; eventRemarks: collected by L. M. Anh and D. H. Quyen; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.4889 ; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Leptobrachella nahangensis; class: Amphibia ; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: nahangensis; scientificNameAuthorship: Lathrop , Murphy , Orlov & Ho, 1998; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 746 m; verbatimLatitude: 22°17.587'N; verbatimLongitude: 105°30.562'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 24April 2021; eventRemarks: collected by H. V. Chung and P. Q. Tien; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.4890 ; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Leptobrachella nahangensis; class: Amphibia ; order: Anura ; family: Megophryidae ; genus: Leptobrachella ; specificEpithet: nahangensis; scientificNameAuthorship: Lathrop , Murphy , Orlov & Ho, 1998; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 762 m; verbatimLatitude: 22°16 ’.372’ N; verbatimLongitude: 105°31.150'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 28August 2020; eventRemarks: collected by P. Q. Tien; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen

Description

Size medium (SVL 39.2-41.3 mm in males; SVL 48.3-54.6 mm in females); head longer than wide (HL 16.5-18.7 mm, HW 14.8-15.3 mm in males; HL 19.0-21.6 mm, HW 17.7-20.0 mm in females); snout round, longer than eye diameter (RL 6.1-6.6 mm, ED 4.9-5.6 mm in males; RL 7.4-8.1 mm, ED 5.9-7.2 mm in females); nostrils situated dorsolaterally on snout, closer to the tip of snout than to eye (NS 2.1-2.6 mm, EN 3.2-4.2 mm in males; NS 2.6-3.0 mm, EN 4.4-5.7 mm in females); canthus round, flat in lateral view, loreal region oblique and concave; tympanum distinct, round; vomerine teeth absent; tongue notched posteriorly. Forelimbs: Forearm slender (FLL 9.1-11.0 mm in males; FLL 12.8-14.0 mm in females), hand length (HAL 22.5-24.2 mm in males; HAL 28.2-30.1 mm in females); relative finger lengths I <II <IV <III; tips of fingers slightly swollen; fingers free of webbing. Hind-limbs: Thigh length (FeL 18.4-20.2 mm in males; FeL 24.4-25.1 mm in females); tibia six times longer than wide in males (TbL 19.0-20.8 mm, TbW 3.2-3.4 mm), tibia five times longer than wide in females (TbL 23.2-25.3 mm, TbW 3.6-5.4 mm); relative toe lengths I <II <V <III <IV; toes with rudimentary webbing; tibio-tarsal articulation reaching to the eye when leg adpressed along body. Skin: Dorsal surface head and body smooth with small pustules and minute tubercles uniformly distributed; supratympanic fold distinct; flanks smooth, large tubercles near waist absent; throat, chest, belly and ventral surface of thighs smooth.

Colouration in life: Dorsal surface of body and limbs grey; dorsum covered with irregular, diffuse dark grey and black spots; flanks light grey with a series of large well defined black spots; a pair of vertical bars on upper lip; limbs and digits with transverse dark bars. Forearm and heels yellow-orange; belly pinkish-white (Fig. 6 ) (determination after Lathrop et al. (1998)).

Distribution

In Vietnam, L. nahangensis was previously known only from Tuyen Quang Province ( Nguyen et al. 2009, Frost 2021). The new record of the species from Bac Kan found approximately 19 km from the type locality in Tuyen Quang Province.

Ecology

Specimens were found on the trees along the stream, between 20:00 and 22:00 h. The surrounding habitat was mixed secondary forest of small hardwoods and shrubs.

Figures

Figure 6. The male specimen of Leptobrachella nahangensis (IEBR A. 4885; SVL 41.3 mm) in life.