Adelophryne tridactyla Duellman and Mendelson, 1995, Univ. Kansas Sci. Bull., 55: 350. Holotype: URP-WED 59953, by original designation. Type locality: "San Jacinto, 190 m, Departamento Loreto, Peru".
Syncope tridactyla — Silva and Meinhardt, 1999, J. Herpetol., 33: 162.
None noted.
Known from Amazonia in northern Loreto, Peru, Tabatinga, Amazonas, Brazil, and Pastaza Province, Ecuador.
Ortega-Andrade and Valencia, 2010, Herpetol. Notes, 3: 251-256, provided the first record for Ecuador and discussed the range.
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