Megophrys microstoma (Boulenger, 1903)

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

Ophryophryne microstoma Boulenger, 1903, Ann. Mag. Nat. Hist., Ser. 7, 12: 187. Syntypes: BMNH (4 specimens); 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.

Ophryophryne poilani Bourret, 1937, Annexe Bull. Gen. Instr. Publique, Hanoi, 1937: 8. Holotype: MNHNP 1948.113, according to Guibé, 1950 "1948", Cat. Types Amph. Mus. Natl. Hist. Nat.: 16. Type locality: "Dong-Tam-Ve, province de Quang-Tri (Annam)", Vietnam. Synonymy by Ohler, 2003, Alytes, 21: 31. This synonymy disputed by Stuart, Rowley, Neang, Emmett, and Sitha, 2010, Cambodian J. Nat. Hist., 2010: 38.

Megophrys (Ophryophryne) poilaniDubois, 1980, Bull. Mens. Soc. Linn. Lyon, 49: 472.

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.

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).

Dong-Tam-Ve Mountain Toad (Ophryophryne poilani [no longer recognized]: Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 86).

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

Narrow-mouthed Horned Frog (Chan-ard, 2003, Photograph. Guide Amph. Thailand: 86).


Northern Vietnam (Ha Giang, Lao Cai, Dien Bien, and Son La provinces southwards to Dak Lak and Lam Dong provinces) and adjacent southern Guangxi and Yunnan, as well as southern Guangdong, China; north-central Thailand; northern and eastern Laos; northeastern mountain regions of Cambodia.


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. Thailand is range according to Khonsue and Thirakhupt, 2001, Nat. Hist. J. Chulalongkorn Univ., 1: 75, although this needs to be confirmed. 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. See account by Ohler, 2003, Alytes, 21: 31-34. Chan-ard, 2003, Photograph. Guide Amph. Thailand: 86-87, provided a very brief account, map for Thailand, and photograph. Nguyen, Ho, and Nguyen, 2005, Checklist Amph. Rept. Vietnam: 15, provided specific localities for Vietnam (as both Ophryophryne poilani and Ophryophryne microstoma). Stuart, 2005, Herpetol. Rev., 36: 475, noted that the report for Laos (as Ophryophryne poilani) by Stuart, 1999, in Duckworth et al. (eds.), Wildlife in Lao PDR: 45, was based on Ophryophryne hansi. 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. Stuart, Rowley, Neang, Emmett, and Sitha, 2010, Cambodian J. Nat. Hist., 2010: 38, provided a record for northeastern Cambodia (as Ophryophryne poilani) and disputed the synonymy as well as documenting sympatry Ophryophryne hansi. 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. Fei and Ye, 2016, Amph. China, 1: 732–734, provided an account, photograph, and dot map for China, as Ophryophryne microstoma. 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.     

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