Rhacophorus orlovi Ziegler & Koehler , 2001

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

Rhacophorus orlovi Ziegler & Koehler, 2001

Materials

Type status: Other material. Occurrence: catalogNumber: IEBR A.4900 ; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Rhacophorus orlovi; class: Amphibia ; order: Anura ; family: Rhacophoridae ; genus: Rhacophorus ; specificEpithet: orlovi; scientificNameAuthorship: Ziegler & Köhler, 2001; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 723 m; verbatimLatitude: 22°16.450'N; verbatimLongitude: 105°30.712'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 25August 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.4901 ; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Rhacophorus orlovi; class: Amphibia ; order: Anura ; family: Rhacophoridae ; genus: Rhacophorus ; specificEpithet: orlovi; scientificNameAuthorship: Ziegler & Köhler, 2001; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 723 m; verbatimLatitude: 22°16.450'N; verbatimLongitude: 105°30.712'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 25August 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.4902 ; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Rhacophorus orlovi; class: Amphibia ; order: Anura ; family: Rhacophoridae ; genus: Rhacophorus ; specificEpithet: orlovi; scientificNameAuthorship: Ziegler & Köhler, 2001; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 696 m; verbatimLatitude: 22°16.328'N; verbatimLongitude: 105°30.503'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 24April 2021; 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.4903 ; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Rhacophorus orlovi; class: Amphibia ; order: Anura ; family: Rhacophoridae ; genus: Rhacophorus ; specificEpithet: orlovi; scientificNameAuthorship: Ziegler & Köhler, 2001; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Kan; locality: Nam Xuan Lac HSCA ; verbatimElevation: 696 m; verbatimLatitude: 22°16.328'N; verbatimLongitude: 105°30.503'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 24 April 2021; 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.4904 ; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Rhacophorus orlovi; class: Amphibia ; order: Anura ; family: Rhacophoridae ; genus: Rhacophorus ; specificEpithet: orlovi; scientificNameAuthorship: Ziegler & Köhler, 2001; 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 40.6-42.8 mm in males; SVL 48.7-57.6 mm in females); head longer than wide (HL 14.9-16.4 mm, HW 14.5-15.7 mm in males; HL 19.0-22.8 mm, HW 18.3-20.9 mm in females); snout slightly pointed, longer than eye diameter (RL 6.4-7.1 mm, ED 4.6-5.6 mm in males; RL 7.5-9.5 mm, ED 6.1-7.5 mm in females); nostrils oval, closer to the tip of snout than to eye (NS 32.4-3.0 mm, EN 4.1-4.7 mm in males; NS 3.6-3.8 mm, EN 2.3-6.1 mm in females); canthus rostralis well-developed, slightly constricted, loreal region concave; tympanum distinct, round; vomerine teeth absent; tongue deeply notched posteriorly. Forelimbs: Forearm slender (FLL 8.1-9.0 mm in males; FLL 12.0-12.4 mm in females), hand length (HAL 21.1-21.7 mm in males; HAL 26.8-32.2 mm in females); relative finger lengths I <II <IV <III, tips of fingers enlarged into discs; webbing formula I1- 1½ II1-2III1-1IV. Hind-limbs: Thigh slender (FeL 20.8-21.7 mm in males; FeL 26.5-30.3 mm in females); tibia six times longer than wide (TbL 22.3-25.1 mm, TbW 3.4-3.7 mm in males; TbL 27.8-31.4 mm, TbW 4.4-5.2 mm in females); relative toe lengths I <II <III <V <IV; webbing formula I ½-1II⅓-1III½ -1IV1-⅓V; tibio-tarsal articulation reaching to the position between the eye and nostril when leg adpressed along body. Skin: Dorsal surface of head, body and upper part of flanks smooth; supratympanic fold distinct; limbs without distinct dermal flaps and folds, except for a weakly developed fold along outer edge of 4th finger and 5th toe; weak tubercles and protuberances on outer edge of tarsus; throat, chest smooth; belly, ventral surface of limbs granular.

Colouration in life: Dorsal surface of head and body reddish-brown with some darker markings; flanks light brown with dark brown reticulation and yellow spots; ventral light grey with some indistinct small dark spots; limbs dorsally light reddish-brown with dark crossbars (Fig. 11 ) (determination after Ziegler and Köhler (2001), Ostroshabov et al. (2013)).

Distribution

In Vietnam, R. orlovi was known from Dien Bien and Son La Provinces in the North to Gia Lai Province in the Central Highlands ( Nguyen et al. 2009). Elsewhere, this species has been recorded from Laos ( Frost 2021).

Ecology

Specimens were found on trees along the trail, between 20:00 and 21:00 h, 2-3 m from the ground. The surrounding habitat consisted of mixed secondary forest composed of small hardwoods and vines.

Figures

Figure 11. The male specimen of Rhacophorus orlovi (IEBR A. 4900; SVL 40.6 mm) in life.