Bufo luetkenii Boulenger, 1891, Ann. Mag. Nat. Hist., Ser. 6, 8: 455. Syntypes: BMNH 1947.2.21.67 (formerly 91.6.17.2) + 2 ZMUC, according to M.S. Hoogmoed in Frost, 1985, Amph. Species World: 52. Type locality: "Cartago, Costa Rica"; type locality considered erroneous by Savage, 1974, Rev. Biol. Tropical, 22: 84, and Savage, 2002, Amph. Rept. Costa Rica: 209.
Cranopsis luetkenii — 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: 364.
Ollotis luetkeni — Frost, Grant, and Mendelson, 2006, Copeia, 2006: 558. by implication.
Ollotis leutkeni — Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 18. Incorrect subsequent spelling.
Incilius luetkeni — Frost, Mendelson, and Pramuk, 2009, Copeia, 2009: 418-419. By implication.
Yellow Toad (Liner, 1994, Herpetol. Circ., 23: 17; Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 42; Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 18).
Low elevations along the Pacific versant from central Costa Rica to extreme southern Chiapas, Mexico, in the vicinity of Tapachula; dry interior valleys of Guatemala and Honduras and Río San Juan drainage in Costa Rica.
In the former Bufo valliceps group of Martin, 1972, in Blair (ed.), Evol. Genus Bufo: 49. Erroneously included within Incilius valliceps (as Bufo valliceps) by Porter, 1970, Cat. Am. Amph. Rept., 94: 1. All of Porter's records for southeastern Guatemala, El Salvador, western Nicaragua, and northwestern Costa Rica are based on this species (J.M. Savage In Frost, 1985, Amph. Species World: 52). See Taylor, 1952, Univ. Kansas Sci. Bull., 35: 615-616, for account. See accounts by Savage, 2002, Amph. Rept. Costa Rica: 208-209 (who included Mexico in the range and noted confusion with Incilius valliceps in the literature), and McCranie and Wilson, 2002, Amph. Honduras: 184-187. Köhler, Vesely, and Greenbaum, 2005 "2006", Amph. Rept. El Salvador: 29-31, provided an account (as Bufo luetkeni, and for El Salvador) and a color photograph. McCranie, 2007, Herpetol. Rev., 38: 38, summarized the departmental distribution in Honduras. Mendelson, Mulcahy, Williams, and Sites, 2011, Zootaxa, 3138: 1-34, suggested that this species is a member of a monophyletic Incilius valliceps group and in a subgroup they referred to as the Lowland group (the name Incilius valliceps subgroup is available—DRF) that includes Incilius gemmifer, Incilius luetkeni, Incilius mazatlanensis, Incilius nebulifer, and Incilius valliceps.
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