Search tool	Example of search string in box	What that means to the database
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	Hyl*	Will find all uses of "Hyl . . ." anywhere in a record: e.g., Hylarana, Hyla, Hylidae, Hylinae, Hylaedactyla.
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	*Hyla	Will find all uses of ". . . hyla" anywhere in a record: e.g., Hyla, Hylidae, Plectrohyla, Ptychadena hylaea, Adenomera hylaedactyla
	Hyla	Will find all records that contain stand-alone uses of Hyla: e.g., Hyla, Hyla arenicolor
Strings of words without quotation marks	Lithobates pipiens	Interprets this as "Lithobates OR pipiens" so will find the union of all records that contain either "Lithobates" or "pipiens": e.g., Lithobates omiltemanus, Hylorana pipiens
Strings of word with quotation marks	"Lithobates pipiens"	Interprets this as "Lithobates AND pipiens" so will return all records that have the character string "Lithobates pipiens" anywhere within a record: e.g., all members of the Lithobates pipiens complex.
AND statement. Means that the results of the search must include both words held together by an AND	Lithobates AND pipiens	Same as "Lithobates pipiens"
OR statement. Means that the results of the search will all records that have either of the terms held together by an OR	Lithobates OR "Costa Rica"	Recovers all records that contain the word "Lithobates" or "Costa Rica": 402 records inasmuch as this will include all records for the entire amphibian fauna of Costa Rica
Combining Boolean operators within the Basic Search box (AND, OR, NOT, quotation marks)	Lithobates AND "Costa Rica" NOT forreri	Recovers only records that contain the word Lithobates AND "Costa Rica", but excludes any record that contains the word "forreri" in any part of the record: 9 records
Printable HELP file

Search tool	Example of search string in box	What that means to the database
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	Hyl*	Will find all uses of "Hyl . . ." anywhere in a record: e.g., Hylarana, Hyla, Hylidae, Hylinae, Hylaedactyla.
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	*Hyla	Will find all uses of ". . . hyla" anywhere in a record: e.g., Hyla, Hylidae, Plectrohyla, Ptychadena hylaea, Adenomera hylaedactyla
Single word	Hyla	Will find all records that contain stand-alone uses of Hyla: e.g., Hyla, Hyla arenicolor
Strings of words without quotation marks	Lithobates pipiens	Interprets this as "Lithobates OR pipiens" so will find the union of all records that contain either "Lithobates" or "pipiens": e.g., Lithobates omiltemanus, Hylorana pipiens
Strings of word with quotation marks	"Lithobates pipiens"	Interprets this as "Lithobates AND pipiens" so will return all records that have the character string "Lithobates pipiens" anywhere within a record: e.g., all members of the Lithobates pipiens complex.
AND statement. Means that the results of the search must include both words held together by an AND	Lithobates AND pipiens	Same as "Lithobates pipiens"
OR statement. Means that the results of the search will all records that have either of the terms held together by an OR	Lithobates OR "Costa Rica"	Recovers all records that contain the word "Lithobates" or "Costa Rica": 402 records inasmuch as this will include all records for the entire amphibian fauna of Costa Rica
Combining Boolean operators within the Basic Search box (AND, OR, NOT, quotation marks)	Lithobates AND "Costa Rica" NOT forreri	Recovers only records that contain the word Lithobates AND "Costa Rica", but excludes any record that contains the word "forreri" in any part of the record: 9 records
Printable HELP file

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) microstoma — Dubois, 1980, Bull. Mens. Soc. Linn. Lyon, 49: 473; Mahony, Foley, Biju, and Teeling, 2017, Mol. Biol. Evol., 34: 755.

Ophryophryne microstoma — Dubois, 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).

Distribution

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

Comment

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).

External links:

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For access to general information see Wikipedia
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For access to relevant technical literature search Google Scholar
For images search CalPhoto Images and Google Images
To search the NIH genetic sequence database, see GenBank
For additional information see AmphibiaWeb report
For information on conservation status and distribution see the IUCN Redlist
For information on distribution, habitat, and conservation see the Map of Life
For related information on conservation and images as well as observations see iNaturalist
For additional information specific to China see Amphibia China
For access to available specimen data for this species, from over 350 scientific collections, go to Vertnet.