Phrissomidius guineensis is a species of beetle in the family Cerambycidae, and the only species in the genus Phrissomidius. It was described by Stephan von Breuning in 1939.Biolib.cz - Phrissomidius guineensis. Retrieved on 8 September 2014.

It's 15–17 mm long and 5–5.5 mm wide, and its type locality is Sierra Leone.

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