Bufo juxtasper Inger, 1964, Fieldiana, Zool., 44: 154. Holotype: FMNH 77472, by original designation. Type locality: "on the banks of the Sungei Tawan, Kalabakan, Tawau District, Sabah", Malaysia (Borneo).
Phrynoidis juxtaspera — 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: 365.
Sungei Tawan Toad (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 42).
Giant River Toad (Das, Jankowski, Makmor, and Haas, 2007, Mitt. Hamburg. Zool. Mus. Inst., 104: 150; Das, 2007, Amph. Rept. Brunei: 28).
Borneo and Sumatra below 1600 m elevation.
In the Bufo asper group of Inger, 1972, in Blair (ed.), Evol. Genus Bufo: 107. See Inger, 1966, Fieldiana, Zool., 52: 69-70, for account. Confused by some authors with Bufo asper. See brief account and photo by Manthey and Grossmann, 1997, Amph. Rept. Südostasiens: 31-32. Malkmus, Manthey, Vogel, Hoffmann, and Kosuch, 2002, Amph. Rept. Mount Kinabalu: 77-80, provided an account. Das, Jankowski, Makmor, and Haas, 2007, Mitt. Hamburg. Zool. Mus. Inst., 104: 149, provided a brief description. Das, 2007, Amph. Rept. Brunei: 28, provided a photograph and a brief account (as Bufo juxtasper).
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