Micryletta inornata (Boulenger, 1890)

Class: Amphibia > Order: Anura > Family: Microhylidae > Subfamily: Microhylinae > Genus: Micryletta > Species: Micryletta inornata

Microhyla inornata Boulenger, 1890, Proc. Zool. Soc. London, 1890: 37. Syntypes: including BMNH (according to Parker, 1934, Monogr. Frogs Fam. Microhylidae: 145) and BMNH (according to Inger, 1985, In Frost (ed.), Amph. Species World: 386). BMNH 1947.2.11.74 (formerly 1889.11.12.4) designated lectotype by Das, Garg, Hamidy, Smith, and Biju, 2019, PeerJ, 7(e7012): 19, Type locality: "Deli" or "Langahat", Sumatra, Indonesia. Lectotype from "Deli, Sumatra", Indonesia. 

Microhyla inornata inornataTaylor, 1962, Univ. Kansas Sci. Bull., 43: 543.

Microhyla inornata lineata Taylor, 1962, Univ. Kansas Sci. Bull., 43: 546. Holotype: EHT 35534, by original designation; now FMNH 178245 according to Marx, 1976, Fieldiana, Zool., 69: 58. Type locality: "10 km. West of Nakhon Si Thammarat", Thailand.

Micryletta inornataDubois, 1987, Alytes, 6: 4.

Micryletta lineata —  Zug and Mulcahy, 2020 "2019", Amph. Rept. S. Tanintharyi: 49. See comment. 

English Names

Deli Paddy Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 91).

Deli Little Pygmy Frog (Fei, 1999, Atlas Amph. China: 296).

Inornate Froglet (Chan-ard, 2003, Photograph. Guide Amph. Thailand: 106).


Known definitely only from Sumatra Island, Indonesia: (1)Tanjung Morawa in Deli Serdang Regency (“Deli”), North Sumatra Province; (2) Suka Makmue in Nagan Raya Regency,Aceh Province; and (3) Gumai Pasemah Wildlife Reserve in Lahat Regency, South Sumatra Province; see comment referencing records of cryptic species of Myanmar, uplands of Thailand, and extreme southern Yunnan (China) to Malaya and Sumatra; isolated population on Taiwan, China; reported (tentatively, see comment) from South Point on South Andaman Island (India).


Prior to the recollection of topotypic material and genetic assay by Alhadi, Hamidy, Farajallah, Munir, Atmaja, Garg, Biju, and Smith, 2019, Zootaxa, 4613: 111–126, the nominal species was thought to be widespread from India to southern China (and Taiwan) to Malaya and Sumatra. But now almost all literature and previous reports are now referrable to unnamed species or to the single synonym fomr Nakhon Si Thammart, Thailand. The authors (p. 116) provide a molecular tree of the 16S rRNA fragment that suggests that nominal Micryletta inornata is composed of at least five lineages, of which only the Sumatra population is assigned the name Micryletta inornata; other lineages being from (1) northern Vietnam and central Laos; (2) northern Thailand and northern Laos; (3) northern Vietnam; and (4) western Thailand. Pretty obviously this leaves a large amount of territory unassayed genetically (including the type locality region of Micryletta inornata lineata) so get ready for a number of new species to be named in the near future (DRF). Earlier literature should now be used with caution: See (as Microhyla inornataTaylor, 1962, Univ. Kansas Sci. Bull., 43: 543-548; and Berry, 1975, Amph. Fauna Peninsular Malaysia: 122-123. Yang, 1991, Amph. Fauna of Yunnan: 241-243 (as Microhyla inornata); and Fei, 1999, Atlas Amph. China: 296-297, provided accounts. See comment under Micrhyletta steinegeri. See brief account and photo by Manthey and Grossmann, 1997, Amph. Rept. Südostasiens: 66. Reported for southwestern Cambodia by Ohler, Swan, and Daltry, 2002, Raffles Bull. Zool., 50: 465-481. Stuart, 1999, in Duckworth et al. (eds.), Wildlife in Lao PDR: 49, commented on the range in Laos. Chan-ard, 2003, Photograph. Guide Amph. Thailand: 106-107, provided a very brief account, map for Thailand, and photograph. Nguyen, Ho, and Nguyen, 2005, Checklist Amph. Rept. Vietnam: 47, provided specific localities for Vietnam. Stuart, 2005, Herpetol. Rev., 36: 476, provided specific localities for Laos. Stuart and Emmett, 2006, Fieldiana, Zool., N.S., 109: 7, provided a record for the Cadamom Mountains, southwestern Cambodia. Das and Dutta, 2007, Hamadryad, 31: 154–181, noted several larval descriptions in the literature of varying completeness. Yang, 2008, in Yang and Rao (ed.), Amph. Rept. Yunnan: 125-126, provided a brief account (as Microhyla inornata) for Yunnan, China. Fei, Hu, Ye, and Huang, 2009, Fauna Sinica, Amph. 2: 917-920, provided an account and spot map for China. Fei, Ye, and Jiang, 2010, Colored Atlas of Chinese Amph.: 489, provided a brief account for China including photographs of specimens and habitat. Matsui, Hamidy, Belabut, Ahmad, Panha, Sudin, Khonsue, Oh, Yong, Jiang, and Nishikawa, 2011, Mol. Phylogenet. Evol., 61: 167-176, suggested on the basis of mtDNA that this nominal species may contain cryptic species, one of which may be more closely related to Microhyla steinegeriFei, Ye, and Jiang, 2012, Colored Atlas Chinese Amph. Distr.: 576, provided an account, photographs, and a range map for China. Guo, Yang, and Li, 2009, Colored Illust. Amph. Rept. Taiwan: 72–73, provided a brief account, photographs, and map. Harikrishnan and Vasudevan, 2018, Alytes, 36: 247–242, who commented on the distribution and natural history in the Andaman Islands, India, and suggested that the Andaman record should be considered tentative inasmuch as the single specimen is a juvenile as well as the more recent result that nominal Micryletta inornata is a species complex. Das, Garg, Hamidy, Smith, and Biju, 2019, PeerJ, 7(e7012): 1–32, described the lectotype and suggested that Micryletta inornata lineata from Myanmar and Thailand, represents a distinct species, most closely related to Micryletta erythropoda, but did not make the taxonomic change. They also noted unnamed species Micryletta cf. inornata A (from Laos, Vietnam, Thailand) and Micryletta cf. inornata B (Laos), both more closely related to Micryletta steinegeri than to Micryletta inornata. See comments by Geissler, Hartmann, Ihlow, Neang, Seng, Wagner, and Böhme, 2019, Cambodian J. Nat. Hist., 2019: 40–63, on specimens (as Micryletta cf inornata) collected in Phnom Kulen National Park, northern Cambodia.  Harikrishnan, Vasudevan, and Dutta, 2017, Das (ed.), Diversity Ecol. Amph. India: 85, doubted the record from the Andaman Island.  Munir, Hamidy, Matsui, Kusrini, and Nishikawa, 2020, Zool. Sci., Tokyo, 37: 295–301, discussed the species complex, naming another species from Sumatra and noting that Micryletta inornata lineata is closer to Micrylette erythropoda than to nominal Micryletta inornata. Zug and Mulcahy, 2020 "2019", Amph. Rept. S. Tanintharyi: 49, provided a brief account, as Micryletta lineata, for South Tanintharyi, peninsular Myanmar, and although this taxonomy is likely correct, the ranges of the constituent parts of the complex have yet to be delimited (DRF).  

External links:

Please note: these links will take you to external websites not affiliated with the American Museum of Natural History. We are not responsible for their content.