Trachycephalus resinifictrix (Goeldi, 1907)

Class: Amphibia > Order: Anura > Family: Hylidae > Subfamily: Hylinae > Genus: Trachycephalus > Species: Trachycephalus resinifictrix

Hyla resinifictrix Goeldi, 1907, Proc. Zool. Soc. London, 1907: 135. Holotype: BMNH 1947.2.23.24 (formerly 1907.2.23.1) according to Condit, 1964, J. Ohio Herpetol. Soc., 4: 94. Type locality: "Mission of San Antonio do Prata, at the River Maracanã (interior of the State of Pará)", Brazil.

Phrynohyas resinifictrixLutz, 1973, Brazil. Spec. Hyla: 248–250; Lescure, 1976, Bull. Mus. Natl. Hist. Nat. Paris, Ser. 3, Zool., 377: 503.

Trachycephalus resinifictrixFaivovich, Haddad, Garcia, Frost, Campbell, and Wheeler, 2005, Bull. Am. Mus. Nat. Hist., 294: 111.

English Names

Mission Golden-eyed Treefrog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 61).

Amazon Milk Frog (Trade name).

Blue Milk Frog (Trade name).

Kunawalu Casque-headed Frog (Kok and Kalamandeen, 2008, Intr. Taxon. Amph. Kaieteur Natl. Park: 210).


Eastern part of the Amazon Basin in Brazil and north into the Guianas; the status of populations (whether Trachycephalus cunauaru or Trachycephalus resinifictrix) of Venezuela (Amazon Basin), Ecuador, Peru, and southeastern Colombia (Amazonas) is provisional and requires genetic confirmation. 


Recognized as distinct from Phrynohyas venulosa by Lescure, 1976, Bull. Mus. Natl. Hist. Nat. Paris, Ser. 3, Zool., 377: 503, in which synonymy it had been placed by Duellman, 1956, Misc. Publ. Mus. Zool. Univ. Michigan, 96: 35; Zimmerman and Hödl, 1983, Zool. Anz., 211: 341–352, provided call differences between the two species as well. Zimmerman, 1983, Herpetologica, 39: 235–246, and Zimmerman and Bogart, 1984, Acta Amazonica, 14: 473–520, reported on vocalization. Rodríguez and Duellman, 1994, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 22: 42, provided a brief account for the Iquitos region of northeastern Peru as Phrynohyas resinifictrix. Lescure and Marty, 2000, Collect. Patrimoines Nat., Paris, 45: 196–197, provided a photo and brief account for French Guiana. See comments regarding distribution of Venezuelan population by Gorzula and Señaris, 1999 "1998", Scient. Guaianae, 8: 38–39. Kok and Kalamandeen, 2008, Intr. Taxon. Amph. Kaieteur Natl. Park: 210–211, provided an account. França and Venâncio, 2010, Biotemas, 23: 71–84, provided a record for the municipality of Boca do Acre, Amazonas, with a brief discussion of the range.See account for Suriname population by Ouboter and Jairam, 2012, Amph. Suriname: 196–199. See Cole, Townsend, Reynolds, MacCulloch, and Lathrop, 2013, Proc. Biol. Soc. Washington, 125: 419, for brief account and records for Guyana. Gordo, Toledo, Suárez, Kawashita-Ribeiro, Ávila, Morais, and Nunes, 2013, Herpetologica, 69: 468, referred specimens from the southern, eastern and central part of the range to Trachycephalus cunauaru. These authors suggested (and provided a map) that Trachycephalus resinifictrix sensu stricto is restricted to the eastern part of the Amazon basin and north into the Guianas. The range for Venezuela is arguable. Forti, Foratto, Márquez, Pereira, and Toledo, 2018, PeerJ, 6(e4813): 1–19, characterized the advertisement call. Fouquet, Vidal, and Dewynter, 2019, Zoosystema, 41: 370, suggested that populations on either side of the Amazon River remains untested. For identification of larvae (as Phrynohyas resinifictrix) in central Amazonia, Brazil, see Hero, 1990, Amazoniana, 11: 201–262. Metcalf, Marsh, Torres Pacaya, Graham, and Gunnels, 2020, Herpetol. Notes, 13: 753–767, reported the species from the Santa Cruz Forest Reserve, Loreto, northeastern Peru. Señaris and Rojas-Runjaic, 2020, in Rull and Carnaval (eds.), Neotrop. Divers. Patterns Process.: 571–632, commented on range and conservation status in the Venezuelan Guayana. Taucce, Costa-Campos, Carvalho, and Michalski, 2022, Eur. J. Taxon., 836: 96–130, reported on distribution, literature, and conservation status for Amapá, Brazil.   

External links:

Please note: these links will take you to external websites not affiliated with the American Museum of Natural History. We are not responsible for their content.