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Published online by Cambridge University Press: 19 May 2016
Olson (1970) erected the genus Goniorhynchus for a Lower Permian microsaur amphibian from Oklahoma. Carroll and Gaskill (1978) used this genus as the type of a new family, Goniorhynchidae. Schultze and Foreman (1981) noted that the name Goniorhynchus Olson, 1970, was preoccupied by Goniorhynchus Hampson, 1896, and they proposed the replacement name Rhynchonkos; however, they retained the family name as Goniorhynchidae.