Microhyla butleri Boulenger 1900

Microhyla butleri Boulenger, 1900 Materials Type status: Other material. Occurrence: catalogNumber: IB A. 6390; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: DE429952-0943-5A9D-BCA1-CFD0B7A7E8D4; Taxon: scientificNameID: Microhyla butleri; scientificName: Microhyla butleri; class: Amphibia; order: Anura; family: Microhylidae; genus: Microhyla; specificEpithet: butleri; scientificNameAuthorship: Boulenger, 1900; Location: country: Vietnam; countryCode: VN; stateProvince: Ha Nam; county: Kim Bang; municipality: Kim Bang; locality: Kim Bang SHCA; verbatimElevation: 29 m; verbatimLatitude: 20 ° 47.882 ' N; verbatimLongitude: 105 ° 82.237 ' E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 25 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. 6391; individualCount: 1; sex: female; lifeStage: adult; occurrenceID: 90C68A34-8714-5B24-BC3C-D4423AC1EA71; Taxon: scientificNameID: Microhyla butleri; scientificName: Microhyla butleri; class: Amphibia; order: Anura; family: Microhylidae; genus: Microhyla; specificEpithet: butleri; scientificNameAuthorship: Boulenger, 1901; Location: country: Vietnam; countryCode: VN; stateProvince: Ha Nam; county: Kim Bang; municipality: Kim Bang; locality: Kim Bang SHCA; verbatimElevation: 29 m; verbatimLatitude: 20 ° 47.882 ' N; verbatimLongitude: 105 ° 82.237 ' E; verbatimCoordinateSystem: WGS 84; Event: eventDate: 25 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 descriptions of Bourret (1942), Manthey and Grossmann (1997), Bain and Nguyen (2004) and Hecht et al. (2013): SVL 22.1 mm in male (n = 1) and 26.8 mm in female (n = 1); snout round, pronounced, longer than eye (RL 2.9 mm, ED 2.5 mm in male; RL 3.7 mm, ED 2.8 mm in female); interorbital distance 1.6–1.9 times broader than upper eyelid (UEW 1.6 mm, IOD 2.5 mm in male; UEW 1.7 mm, IOD 3.2 mm in female); tympanum invisible; vomerine teeth absent; tongue roundly spatulate and free at the rear half of its length; external vocal sac present in males. Fore-limb slender (HAL 10.4 mm in male and 10.9 mm in female); fingers free of webbing, with slightly developed discs. Hind-limb slender, tibia longer than thigh (TbL 13.4 mm, FL 11.3 mm in male; TbL 14.0 mm, FL 12.5 mm in female); toes with small discs, basally webbed; subarticular tubercle prominent; inner and outer metatarsal tubercles present; tibio-tarsal articulation reaching between eye and tip of snout. Dorsal skin with tiny tubercles on the dorsum and tibia; ventral skin smooth, cloacal region granular. Colouration in life: dorsal surface of head grey, dorsal surface of body brown; a grey stripe extending from eye to shoulder; limbs with dark transverse bars; ventral surface whitish (Figs 2, 3). Distribution In Vietnam, this species is known from Lao Cai and Ha Giang Provinces in the north, southwards to Dong Nai Province and Ho Chi Minh City (Nguyen et al. 2009, Hecht et al. 2013). Elsewhere, this species is known from China, Myanmar, Laos, Thailand, Cambodia, Indonesia, Malaysia and Singapore (Frost 2025). Ecology Specimens of Microhyla butleri were found on the ground near a small puddle between 20: 15 h and 20: 45 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. LC (Least Concern) (IUCN 2025).