Athemistus assimilis is a species of beetle in the family Cerambycidae. It was described by Stephan von Breuning in 1939. It is known from Australia.BioLib.cz - Athemistus assimilis. Retrieved on 8 September 2014.

It is 11 mm long and 4 mm wide, and its type locality is Cooktown, Queensland.

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