Leptodactylus syphax Bokermann, 1969, Rev. Brasil. Biol., 29: 13. Holotype: WCAB 16141, by original designation; now MZUSP 73851, by museum records (W.R. Heyer, personal commun.). Type locality: "São Vicente (Gustavo Dutra), Cuiabá, 600 m, Mato Grosso, Brasil".
Basin White-lipped Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 82).
Whistling Foam Frog (Eterovick and Sazima, 2004, Anf. Serra do Cipó: 97).
Central to northeastern Brazil (Minas Gerais, Goiás, Mato Gross, Piauí, Paraíba, south to São Paulo); southern Paraguay; eastern Bolivia (Santa Cruz).
In the Leptodactylus pentadactylus group of Heyer, 1972, Contrib. Sci. Nat. Hist. Mus. Los Angeles Co., 231: 1-8, and Heyer, 1979, Smithson. Contrib. Zool., 301: 1-43. See Heyer, 1995, Proc. Biol. Soc. Washington, 108: 713-714, for discussion of distribution and Paraguay record. Köhler, 1995, Herpetofauna, Weinstadt, 17: 6-8, and De la Riva, Köhler, Lötters, and Reichle, 2000, Rev. Esp. Herpetol., 14: 43, provided the Bolivian citation. Silva and Facure, 2007, Herpetol. Rev., 38: 215, provided a record for Goiás, Brazil, and discussed the range. Brusquetti and Lavilla, 2006, Cuad. Herpetol., 20: 15, briefly discussed the range in Paraguay. Eterovick and Sazima, 2004, Anf. Serra do Cipó: 97-98, provided a photograph and brief account. Martins and Silva, 2009, Check List, 5: 433-435, provided a map of know localities and reported the first records for São Paulo, Brazil. Reviewed by Heyer, Heyer, and de Sá, 2010, Cat. Am. Amph. Rept., 868: 1-9. Andrade, Guimarães, Leite, and Leite, 2011, Check List, 7: 592-593, provided a range extension to Piauí, Brazil, and discussed the range.
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