Alcalus tasanae (Smith, 1921)

Class: Amphibia > Order: Anura > Family: Ceratobatrachidae > Subfamily: Alcalinae > Genus: Alcalus > Species: Alcalus tasanae

Rana pullus Smith, 1921, J. Fed. Malay States Mus., 10: 197. Syntypes: BMNH (11 specimens), by original designation. Type locality: "Tasan, 25 miles S. W. Chumporn, Peninsular Siam [Thailand]". Preoccupied by Rana gracilis var. pulla Stoliczka, 1870.

Rana tasanae Smith, 1921, J. Nat. Hist. Soc. Siam, 4: 193. Replacement name for Rana pullus Smith, 1921.

Rana (Discodeles) tasanaeSmith, 1930, Bull. Raffles Mus., 3: 102; Bourret, 1942, Batr. Indochine: 376.

Ingerana (Ingerana) tasanaeDubois, 1987 "1986", Alytes, 5: 65.

Alcalus tasanae — Yan, Jiang, Jin, Suwannapoom, Li, Vindum, Brown, and Che, 2016, Zool. Res., Kunming, 37: 11–12. 

English Names

Tasan Eastern Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 99).

Tha San Frog (Nutphund, 2001, Amph. Thailand: 102).

Tasan Frog (Chan-ard, 2003, Photograph. Guide Amph. Thailand: 112).

Tha San Dwarf Cascadefrog (Zug and Mulcahy, 2020 "2019", Amph. Rept. S. Tanintharyi: 30). 

Tasan Dwarf Frog (Poyarkov, Nguyen, Popov, Geissler, Pawangkhanant, Neang, Suwannapoom, and Orlov, 2021, Russ. J. Herpetol., 28 (3A): 21). 


Northern (Kachin), western (Kanchanaburi) and central peninsular Thailand (Chumphon, Ranong, Surat Thani, and Phag Nga provinces), into adjacent Tenasserim (Tanintharyi), Myanmar, ca. 1000 m elevation.


Closely related to Rana beddomii according to the original publication. See comment under Rana beddomii. Discussed by Bourret, 1942, Batr. Indochine: 376–377. See account by Taylor, 1962, Univ. Kansas Sci. Bull., 43: 456–459. Nutphund, 2001, Amph. Thailand: 102, provided a brief characterization (as Rana tasanae) and photograph (which Ohler, 2003, Alytes, 21: 101, did not consider identifiable beyond the association with the genus Limnonectes). Chan-ard, 2003, Photograph. Guide Amph. Thailand: 112–113, provided a very brief account, map for Thailand, and photograph. See photograph, map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 481. Chan-ard, Cota, and Makchai, 2011, Amph. E. Region Thailand: 133, detailed the distribution in Thailand. Yan, Jiang, Jin, Suwannapoom, Li, Vindum, Brown, and Che, 2016, Zool. Res., Kunming, 37: 9, reported the species from Kachin and Tanintharyi states, Myanmar. Mulcahy, Lee, Miller, Chand, Thura, and Zug, 2018, ZooKeys, 757: 85–162, a record from Tanintharyi Division, Myanmar. Zug and Mulcahy, 2020 "2019", Amph. Rept. S. Tanintharyi: 30–31, provided a brief account for South Tanintharyi, peninsular Myanmar. 

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