Phonodus is an extinct genus of procolophonid parareptile.

It is known from a single skull found from the Early Triassic Katberg Formation in South Africa.

It is the oldest known member of the subfamily Leptopleuroninae, and was likely the result of a procolophonid migration into the Karoo Basin from Laurasia after the Permo-Triassic extinction event.

Because Phonodus had large maxillary teeth underneath a large antorbital buttress (a bony prominence in front of the eye), and a lack of ventral temporal emargination along the side of the skull, it probably had a durophagous diet.

[1] A cladogram after Modesto et al. (2010):[1] Pentaedrusaurus ordosianus Neoprocolophon asiaticus Phonodus dutoitorum Sclerosaurus armatus Scoloparia glyphanodon Leptopleuron lacertinum Soturnia caliodon Hypsognathus fenneri