Occidozyga shiwandashanensis Chen, Peng, Liu, Huang, Liao and Mo, 2022

Tran, Tung Thanh, Hoang, Chung Van, Luong, Anh Mai, Nguyen, Truong Quang, Ziegler, Thomas & Pham, Cuong The, 2023, Integrative taxonomic analyses reveal first country records of Occidozyga shiwandashanensis Chen, Peng, Liu, Huang, Liao & Mo, 2022 and Hylarana latouchii (Boulenger, 1899) (Anura, Dicroglossidae, Ranidae) from Vietnam, Biodiversity Data Journal 11, pp. 109726-109726 : 109726

Occidozyga shiwandashanensis Chen, Peng, Liu, Huang, Liao and Mo, 2022

Materials

Type status: Other material. Occurrence: catalogNumber: IEBR A.5199 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: 82BB7128-5289-5DB2-8D23-EA77CC01D1F1; Taxon: scientificNameID: Occidozyga shiwandashanensis; scientificName: Occidozyga shiwandashanensis; class: Amphibia ; order: Anura ; family: Dicroglossidae ; genus: Occidozyga ; specificEpithet: shiwandashanensis; scientificNameAuthorship: Chen , Peng , Liu , Huang , Liao and Mo , 2022; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay yen Tu Nature Reserve ; verbatimElevation: 400 m; verbatimLatitude: 21°09.662'N; verbatimLongitude: 106°49.236'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 22 May 2015; eventRemarks: collected by C. T. Pham; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.5200 ; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: D0631131-0D25-5669-8B67- 6AD 0E87FC1E3; Taxon: scientificNameID: Occidozyga shiwandashanensis; scientificName: Occidozyga shiwandashanensis; class: Amphibia ; order: Anura ; family: Dicroglossidae ; genus: Occidozyga ; specificEpithet: shiwandashanensis; scientificNameAuthorship: Chen , Peng , Liu , Huang , Liao and Mo , 2022; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay yen Tu Nature Reserve ; verbatimElevation: 360 m; verbatimLatitude: 21°10.757'N; verbatimLongitude: 106°42.623'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 12 June 2007; eventRemarks: collected by T. T. Tran; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.5201 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: C2F27082-CD49-52F9-B464-F6A442067019; Taxon: scientificNameID: Occidozyga shiwandashanensis; scientificName: Occidozyga shiwandashanensis; class: Amphibia ; order: Anura ; family: Dicroglossidae ; genus: Occidozyga ; specificEpithet: shiwandashanensis; scientificNameAuthorship: Chen , Peng , Liu , Huang , Liao and Mo , 2022; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay yen Tu Nature Reserve ; verbatimElevation: 445 m; verbatimLatitude: 21°09.861'N; verbatimLongitude: 106°48.885'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 16 June 2007; eventRemarks: collected by T. T. Tran; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.5202 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: A7BF3B31-E034-554B-A63D-644C6BDF4114; Taxon: scientificNameID: Occidozyga shiwandashanensis; scientificName: Occidozyga shiwandashanensis; class: Amphibia ; order: Anura ; family: Dicroglossidae ; genus: Occidozyga ; specificEpithet: shiwandashanensis; scientificNameAuthorship: Chen , Peng , Liu , Huang , Liao and Mo , 2022; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay yen Tu Nature Reserve ; verbatimElevation: 330 m; verbatimLatitude: 21°10.131'N; verbatimLongitude: 106°48.727'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 16 June 2007; eventRemarks: collected by T. T. Tran; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen Type status: Other material. Occurrence: catalogNumber: IEBR A.5203 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: 3A267451-403C-5584-8EEA-CB325CB7EF4A; Taxon: scientificNameID: Occidozyga shiwandashanensis; scientificName: Occidozyga shiwandashanensis; class: Amphibia ; order: Anura ; family: Dicroglossidae ; genus: Occidozyga ; specificEpithet: shiwandashanensis; scientificNameAuthorship: Chen , Peng , Liu , Huang , Liao and Mo , 2022; Location : country: Vietnam; countryCode: VN; stateProvince: Bac Giang; locality: Tay yen Tu Nature Reserve ; verbatimElevation: 341 m; verbatimLatitude: 21°09.796'N; verbatimLongitude: 106°49.293'E; verbatimCoordinateSystem: WGS84; Event: eventDate: 16 June 2007; eventRemarks: collected by T. T. Tran; Record Level: language: en; collectionCode: Amphibia; basisOfRecord: PreservedSpecimen

Description

Morphometrics of the specimens are provided in Suppl. material 4. Morphological characters of the specimens from Bac Giang Province agreed well with the original description of Chen et al. (2022). Size medium (SVL 28.1 mm in males, SVL 36.2-39.5 mm in females); head wider than long (HL/HW 0.86 in males, HL/HW 0.86-0.91 in females); snout round in dorsal and lateral views, projecting slightly over lower jaw; canthus rostralis broadly round; loreal region vertical and slightly concave; snout slightly shorter than eye diameter (ED/RL 1.06 in males, ED/RL 1.04-1.10 in females); internarial distance wider than interorbital distance and upper eyelid width (IND 2.7 mm, IOD 1.8 mm, UEW 2.5 mm in males; IND 2.9-3.6 mm, IOD 2.0-2.4 mm, UEW 2.3-2.8 mm in females); tympanum hidden; vomerine teeth absent; tongue fleshy, round posteriorly.

Fore-limbs robust, upper arm length shorter than forearm length (UAL/SVL 0.17, FAL/SVL 0.40 in males; UAL/SVL 0.15-0.16, FAL/SVL 0.37-0.39 in females); fingers free of webbing, relative finger lengths II<I <IV <III; tips of fingers pointed; dermal fringes absent; subarticular tubercles present, formula 1, 1, 2, 2; palmar tubercles prominent, round; inner and outer metatarsal present; nuptial pad on finger I present in male.

Hind-limbs short, thigh longer than tibia (FeL/SVL 0.43, TbL/SVL 0.41 in males; FeL/SVL 0.43-0.45, TbL/SVL 0.41-0.43 in females; tibia approximately 2.5 times longer than wide (TbL/TbW 2.48 in males, TbL/TbW 2.40-2.59 in females); tips of toes round, slightly expanded into disc; relative toe lengths I <II <V <III <IV; toes fully webbed; subarticular tubercles present, formula 1, 1, 2, 3, 2; inner metatarsal tubercle elongate; outer metatarsal tubercle absent; tibio-tarsal articulation reaching posterior edge of eye.

Skin: Dorsal surface shagreened with small, raised tubercles, more prominent and dense on tibia; distinctly raised supratympanic fold stretching from corner of eye to shoulder; dorsolateral fold absent; ventral surface of throat, chest, abdomen and thighs scattered with small glands.

Colouration in life: Dorsum pale brown with irregular pale dark spots with a light yellow vertebral stripe; dorsal surface of hind limbs pale brown with dark crossbars; ventral surface creamy-white with brown spots on lateral margin and throat; ventral surface of limbs yellow-white with dense brown spots; ventral surfaces of palm and feet brown; pupil reddish-brown; iris pale brown (Fig. 4 ) (determination after Chen et al. (2022)).

Distribution

The species was previously known only from the Shiwandashan Mountain, Fangcheng, Guangxi, China ( Chen et al. 2022). The new record of this species in Bac Giang Province of Vietnam is approximately 180 km distant from the type locality in China.

Ecology

The specimens were found between 19:00 h and 23:00 h on the ground, in small ponds and in small streams. The surrounding habitat was mixed secondary evergreen forest consisting of larger and medium hardwoods, shrubs and arrowroot. The females contained yellowish-cream eggs with melanic poles. The specimens from Bac Giang Province were found at elevations of 300-400 m a.s.l., lower than the known altitude range in Guangxi, China (550-650 m a.s.l.) ( Chen et al. 2022).

Notes

The specimen from Vietnam slightly differs from the type series from China by having the snout slightly shorter than eye diameter (vs. eye diameter less than snout length) and the presence of a light yellow vertebral stripe on the dorsum.

Figures

Figure 4. Occidozyga shiwandashanensis (IEBR A. 5199) from Bac Giang Province, Vietnam. A dorsolateral view; B ventral view.