Sylvirana mortenseni (Boulenger, 1903)

Class: Amphibia > Order: Anura > Family: Ranidae > Genus: Sylvirana > Species: Sylvirana mortenseni

English Names

Koh Chang Island Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 108).

Mortensen's Frog (Chan-ard, 2003, Photograph. Guide Amph. Thailand: 132).


Southeastern and eastern Thailand through central Laos and southwestern and northern and central Cambodia, below 800 m elevation.


Prior to the revision of Frost, Grant, Faivovich, Bain, Haas, Haddad, de Sá, Channing, Wilkinson, Donnellan, Raxworthy, Campbell, Blotto, Moler, Drewes, Nussbaum, Lynch, Green, and Wheeler, 2006, Bull. Am. Mus. Nat. Hist., 297, placed in the Section Hylarana, subsection Hydrophylax, subgenus Sylvirana of Dubois, 1992, Bull. Mens. Soc. Linn. Lyon, 61: 326. See comment under Rana nigrovittata. Reported for southwestern Cambodia by Ohler, Swan, and Daltry, 2002, Raffles Bull. Zool., 50: 465–481. Chan-ard, 2003, Photograph. Guide Amph. Thailand: 132–133, provided a very brief account, map for Thailand, and photograph. Stuart and Emmett, 2006, Fieldiana, Zool., N.S., 109: 10, provided records for the Cadamom Mountains, southwestern Cambodia, and noted differences in observations from those made previously of this species by Ohler et al. (2002). Neang and Holden, 2008, Field Guide Amph. Cambodia: 82, provided a photograph, brief account of identification, ecology, and range in Cambodia. Fei, Ye, Jiang, and Xie, 2008, Acta Zootaxon. Sinica, 33: 199–206, provided a key to the close relatives of this species. See statement of geographic range, habitat, and conservation status (as Rana mortenseni) in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 633. Chan-ard, Cota, and Makchai, 2011, Amph. E. Region Thailand: 106–107, provided a photograph and brief account for the Eastern Region of Thailand, and (p.  146) detailed the range in Thailand. See account by Sheridan and Stuart, 2018, PLoS One, 13(3: e0192766): 16–23. See comments by Geissler, Hartmann, Ihlow, Neang, Seng, Wagner, and Böhme, 2019, Cambodian J. Nat. Hist., 2019: 40–63, on specimens collected in Phnom Kulen National Park, northern Cambodia. 

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