Kaloula mediolineata Smith, 1917

Class: Amphibia > Order: Anura > Family: Microhylidae > Subfamily: Microhylinae > Genus: Kaloula > Species: Kaloula mediolineata

Callula mediolineata Smith, 1917, J. Nat. Hist. Soc. Siam, 2: 224. Syntypes: BMNH 1916.4.17.3 (now 1947.2.10.57, from Nong Pling, Paknampo) and, 1917.5.14.41–44 (now 1947.2.10.58–61, from Prachuap, Kirikam), according to museum records, and 1921.4.1.279–283, according to Parker, 1934, Monogr. Frogs Fam. Microhylidae: 82. Type locality: "Prachuap Kirikan, S. W. Siam [Thailand]".

Kaloula mediolineataParker, 1934, Monogr. Frogs Fam. Microhylidae: 81.

English Names

Siam Narrowmouth Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 90).

White-backed Bullfrog (Nutphund, 2001, Amph. Thailand: 161).

Stripe-back Bullfrog (Nutphund, 2001, Amph. Thailand: 161).

Median-striped Bullfrog (Chan-ard, 2003, Photograph. Guide Amph. Thailand: 98).

Middle Back-stripe Bullfrog (Nguyen, Ho, and Nguyen, 2005, Checklist Amph. Rept. Vietnam: 43).

Siam Bullfrog (Poyarkov, Nguyen, Popov, Geissler, Pawangkhanant, Neang, Suwannapoom, and Orlov, 2021, Russ. J. Herpetol., 28 (3A): 39). 


Southern mainland (non-peninsular) Thailand and into northern Cambodia (Phnom Kulen National Park) and southern Vietnam (Dac Lac Province and Phu Qui Island, Bin Thuan Province) through intervening Laos.

Geographic Occurrence

Natural Resident: Cambodia, Laos, Thailand, Vietnam


See accounts by Bourret, 1942, Batr. Indochine: 485–486, and Taylor, 1962, Univ. Kansas Sci. Bull., 43: 566–569. Heyer, 1971, Fieldiana, Zool., 58: 83–91, described the tadpole from Thailand. Orlov, Murphy, Ananjeva, Ryabov, and Ho, 2002, Russ. J. Herpetol., 9: 99, provided the Vietnam distribution without reference to voucher specimens. Nutphund, 2001, Amph. Thailand: 161, provided a brief characterization and photograph. Stuart, 1999, in Duckworth et al. (eds.), Wildlife in Lao PDR: 49, reported the species in Laos. Chan-ard, 2003, Photograph. Guide Amph. Thailand: 98–99, provided a very brief account, map for Thailand, and photograph. See statement of geographic range, habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 626. Chan-ard, Cota, and Makchai, 2011, Amph. E. Region Thailand: 40–41, provided a photograph and brief account for eastern Thailand, and (p. 130), detailed the distribution in Thailand. Phung, Nguyen, Rauhaus, and Ziegler, 2013, Herpetol. Notes, 6: 463–465, provided a record from Phu Qui Island, Binh Thuan Province, southern Vietnam. Niyomwan, Srisom, and Pawangkhanant, 2019, Field Guide Amph. Thailand: 214–215, provided a brief account (photographs, habitat, and range) for Thailand (in Thai). Geissler, Hartmann, Ihlow, Neang, Seng, Wagner, and Böhme, 2019, Cambodian J. Nat. Hist., 2019: 40–63, provided a record from Phnom Kulen National Park, northern Cambodia. Vassilieva, 2021, Zootaxa, 4952: 71–86, described larval morphology. 

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