Occidozyga lingnanica Lyu & Wang, 2022

Occidozyga lingnanica Lyu & Wang, 2022

Materials

Type status: Other material. Occurrence: catalogNumber: IB. A. 6400 ; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: 374BC282-71D4-55C0-B309-66CE094CE73D; Taxon: scientificNameID: Occidozyga lingnanica ; scientificName: Occidozyga lingnanica ; class: Amphibia; order: Anura ; family: Dicroglossidae ; genus: Occidozyga ; specificEpithet: lingnanica ; scientificNameAuthorship: Lyu & Wang, 2022; Location: country: Vietnam; countryCode: VN; stateProvince: Ha Nam; county: Kim Bang; municipality: Kim Bang; locality: Kim Bang SHCA ; verbatimElevation: 38 m; verbatimLatitude: 20 ° 48.274 ' N; verbatimLongitude: 105 ° 84.089 ' E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 22 April 2025; eventRemarks: collected by Nguyen QT, Pham TC, Phan QT, and Pham VA; Record Level: language: en; collectionCode: Amphibians; basisOfRecord: PreservedSpecimen

Type status: Other material. Occurrence: catalogNumber: IB A. 6401 ; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: E2D4B011-7C8B-5287-A48C-E1A05970D2D2; Taxon: scientificNameID: Occidozyga lingnanica ; scientificName: Occidozyga lingnanica ; class: Amphibia; order: Anura ; family: Dicroglossidae ; genus: Occidozyga ; specificEpithet: lingnanica ; scientificNameAuthorship: Lyu & Wang, 2022; Location: country: Vietnam; countryCode: VN; stateProvince: Ha Nam; county: Kim Bang; municipality: Kim Bang; locality: Kim Bang SHCA ; verbatimElevation: 38 m; verbatimLatitude: 20 ° 48.274 ' N; verbatimLongitude: 105 ° 84.089 ' E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 22 April 2025; eventRemarks: collected by Nguyen QT, Pham TC, Phan QT, and Pham VA; Record Level: language: en; collectionCode: Amphibians; basisOfRecord: PreservedSpecimen

Description

Morphological characters of the specimens from Ha Nam Province agreed well with the description of Lyu et al. (2022): SVL 22.2 mm in male (n = 1) and 28.4 mm in female (n = 1); head longer than wide (HW 7.8 mm, HL 8.2 mm in male; HW 8.7 mm, HL 8.9 mm in female); snout round in dorsal view and profile, longer than eye (RL 3.5 mm, ED 2.8 mm in male; RL 4.0 mm, ED 3.0 mm in female); interorbital distance 1.5–2.0 times broader than upper eyelid (UEW 1.5 mm, IOD 3.0 mm in male; UEW 2.1 mm, IOD 3.1 mm in female); tympanum hidden, edge invisible; vomerine teeth absent; tongue round posteriorly; external vocal sac present in males. Fore-limb slender (HAL 8.5 mm in male and 11.3 mm in female); fingers free of webbing, tips round and not dilated; relative finger lengths II = I < IV < III; nuptial pad present in male. Hind-limb slender, tibia longer than thigh (TbL 11.0 mm, FL 10.1 mm in male; TbL 14.0 mm, FL 12.8 mm in female); relative lengths I < II < V < III < IV; toe tips round, dilated into round discs; toes fully webbed; subarticular tubercles present; inner and outer metatarsal tubercles present; tibio-tarsal articulation reaching at the posterior margin of supratympanic fold. Dorsal surface of body and limb rough, with large tubercles, flanks with tubercles; a faint fold across head between orbits; supratympanic fold distinct; dorsolateral fold absent; ventral surface with flat tubercles; a fold across breast; and dense granules on the ventral tarsi. Colouration in life: Dorsal surface greyish-brown with irregular black speckles; a narrow transverse dark bar between orbits; mid-dorsal stripe yellowish-brown, but indistinct; limbs with dark brown transverse bars; throat dark grey with white mottling; chest and belly uniform creamy white (Figs 12 View Figure 12 , 13 View Figure 13 ).

Distribution

In Vietnam, this species is known from Ninh Binh Province (unpublished data). Elsewhere, this species is known from China (Frost 2025).

Ecology

Specimens of Occidozyga lingnanica were found on the ground near a small stream between 19: 00 h and 21: 30 h. Males were recorded calling at the site and tadpoles were detected in temporary water puddles. The surrounding habitat was a mixed secondary forest of small hardwood and shrubs.

Conservation

Conservation status. Not evaluated ( IUCN 2025).