Ophryophryne microstoma Boulenger, 1903

Class: Amphibia > Order: Anura > Family: Megophryidae > Subfamily: Megophryinae > Genus: Ophryophryne > Species: Ophryophryne microstoma

Ophryophryne microstoma Boulenger, 1903, Ann. Mag. Nat. Hist., Ser. 7, 12: 187. Syntypes: BMNH (4 specimens), by museum records, these being BMNH 1947.2.22.50–53 (1903.4.29.104–107); BMNH 1947.2.22.52 (formerly 1903.4.29.106) designated lectotype by Ohler, 2003, Alytes, 21: 31. Type locality: "Man-son Mountains, Tonkin, altitude 3000–4000 feet", Vietnam.

Megophrys (Ophryophryne) microstomaDubois, 1980, Bull. Mens. Soc. Linn. Lyon, 49: 473; Mahony, Foley, Biju, and Teeling, 2017, Mol. Biol. Evol., 34: 755. 

Ophryophryne microstomaDubois, 1987 "1986", Alytes, 5: 23; Lyu, Zeng, Wang, Liu, Huang, Li, and Wang, 2021, Zootaxa, 4927: 40.

English Names

Asian Mountain Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 86; Nguyen, Ho, and Nguyen, 2005, Checklist Amph. Rept. Vietnam: 15).

Narrow-mouthed Horned Toad (Fei, 1999, Atlas Amph. China: 124).

Tonkin Mountain Toad (Poyarkov, Nguyen, Popov, Geissler, Pawangkhanant, Neang, Suwannapoom, and Orlov, 2021, Russ. J. Herpetol., 28 (3A): 34). 


Northern Vietnam (Ha Giang, Lao Cai, Dien Bien, Hai Phong, Ninh Binh, Quang Ninh, Bac Giang, and Son La provinces southwards to Dak Lak, Tuyen Quang, and Lam Dong provinces) and adjacent southern Guangxi and Yunnan, as well as southern Guangdong, China, and Chiang Mai and Nan provinces, Thailand. See comment. 

Geographic Occurrence

Natural Resident: China, People's Republic of, Thailand, Vietnam


See Liu and Hu, 1962, Acta Zool. Sinica, 14 (Supplement): 80–82; Bourret, 1942, Batr. Indochine: 161–162; Yang, 1991, Amph. Fauna of Yunnan: 64–65; Ye, Fei, and Hu, 1993, Rare and Economic Amph. China: 176; and Fei, 1999, Atlas Amph. China: 124–125, for accounts.  Zhang and Wen, 2000, Amph. Guangxi: 51, provided an account for Guangxi. Orlov, Murphy, Ananjeva, Ryabov, and Ho, 2002, Russ. J. Herpetol., 9: 84, noted that records exist for northern and eastern Laos (but see below). See account by Ohler, 2003, Alytes, 21: 31–34 (who considered Ophryophryne poilani and Ophryophryne microstoma to be synonymous).Nguyen, Ho, and Nguyen, 2005, Checklist Amph. Rept. Vietnam: 15, provided specific localities for Vietnam (as both Ophryophryne poilani and Ophryophryne microstoma).Bain, Nguyen, and Doan, 2007, Herpetol. Rev., 38: 108, provided records from Thua Thien-Hue and Lao Cai Provinces, Vietnam, and briefly discussed the range. Yang, 2008, in Yang and Rao (ed.), Amph. Rept. Yunnan: 34–35, provided a brief account for Yunnan, China. Fei, Hu, Ye, and Huang, 2009, Fauna Sinica, Amph. 2: 472–477, provided an account for China and spot map. Fei, Ye, and Jiang, 2010, Colored Atlas of Chinese Amph.: 218–219, provided a brief account including photographs. Fei, Ye, and Jiang, 2012, Colored Atlas Chinese Amph. Distr.: 247, provided an account, photographs, and a range map for China. Hecht, Pham, Nguyen, Nguyen, Bonkowski, and Ziegler, 2013, Biodiversity J., 4: 507–552, reported a record from Tay Yen Tu Nature Reserve, Bac Giang Province, northeastern Vietnam and discussed the range. Poyarkov, Duong, Orlov, Gogoleva, Vassilieva, Nguyen, Nguyen, Nguyen, Che, and Mahony, 2017, ZooKeys, 672: 49–120, provided genetically confirmed records from Fulong, Guangxi Province, China, and  Lao Cai Province, Vietnam. Fei and Ye, 2016, Amph. China, 1: 732–734, provided an account, photograph, and dot map for China, as Ophryophryne microstoma. Poyarkov, Nguyen, Duong, Gorin, and Yang, 2018, PeerJ, 6 (e5771): 17, provided records for Cat Ba National Park, Hai Phong Province, and Cuc Phuong National Park, Ninh Binh Province, Vietnam. Luong, Nguyen, Le, Nguyen, and Nguyen, 2019, Herpetol. Notes, 12: 375–387, provided records from Dien Bien Province, Vietnam, and discussed the range and natural history. Pham, Pham, Doan, Ziegler, and Nguyen, 2019, Biodiversity Data J., 7 (e39140): 1–18, reported the species from Son La Province, northwestern Vietnam. Makchai, Chuaynkern, Safoowong, Chuachat, and Cota, 2020, Amph. N. Thailand: 104, provided a brief account, photographs, and a range map for Thailand. Pham, Do, Ngo, Tran, Ziegler, and Nguyen, 2020, Check List, 16: 1025–1041, provided a record from Hai Ha District, Quang Ninh Province, Vietnam, on the Guangxi, China, border. Le, Luong, Pham, Phan, Nguyen, Ziegler, and Nguyen, 2021, Bonn Zool. Bull., 70: 201–219, provided natural history notes and a record from Tuyen Quang Province, Vietnam. According to Poyarkov, Nguyen, Popov, Geissler, Pawangkhanant, Neang, Suwannapoom, and Orlov, 2021, Russ. J. Herpetol., 28 (3A): 35, suggested that localities from Thailand refer to Ophryophryne pachyproctus (Duong et al., in press). 

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